QuickLinks -- Click here to rapidly navigate through this document

---

---

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-Q

ý	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2005
or
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                             to

Commission File Number: 1-6620

---

GRIFFON CORPORATION
(Exact name of registrant as specified in its charter)

DELAWARE (State or other jurisdiction of incorporation or organization)		11-1893410 (I.R.S. Employer Identification No.)
100 JERICHO QUADRANGLE, JERICHO, NEW YORK (Address of principal executive offices)		11753 (Zip Code)
(516) 938-5544 (Registrant's telephone number, including area code)

---

        Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter time that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý    No o

        Indicate by check mark whether registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act). Yes ý    No o

        Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date. 29,145,422 shares of Common Stock as of April 30, 2005.

---

---

---

FORM 10-Q

CONTENTS

					Page
Part I   —	Financial Information (Unaudited)
	Condensed Consolidated Balance Sheets at March 31, 2005 and September 30, 2004				1
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended March 31, 2005 and 2004				3
	Condensed Consolidated Statements of Cash Flows for the Six Months ended March 31, 2005 and 2004				5
	Notes to Condensed Consolidated Financial Statements				6
	Management's Discussion and Analysis of Financial Condition and Results of Operations				11
	Quantitative and Qualitative Disclosures about Market Risk				15
	Controls & Procedures				15
Part II —	Other Information
	Item 1:		Legal Proceedings		16
	Item 2:		Unregistered Sales of Equity Securities and Use of Proceeds		16
	Item 3:		Defaults upon Senior Securities		16
	Item 4:		Submission of Matters to a Vote of Security Holders		16
	Item 5:		Other Information		17
	Item 6:		Exhibits		17
	Signature				18

---

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

See notes to condensed consolidated financial statements.

1

---

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

See notes to condensed consolidated financial statements.

2

---

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

			Three Months Ended March 31,
			2005			2004
Net sales			$	322,473,000		$	317,636,000
Cost of sales				245,153,000			225,607,000
	Gross profit			77,320,000			92,029,000
Selling, general and administrative expenses				69,717,000			70,841,000
	Income from operations			7,603,000			21,188,000
Other income (expense):
	Interest expense			(2,057,000	)		(2,049,000	)
	Interest income			572,000			290,000
	Other, net			(17,000	)		(81,000	)
				(1,502,000	)		(1,840,000	)
	Income before income taxes			6,101,000			19,348,000
Provision for income taxes (Notes 6 and 7)				832,000			7,159,000
	Income before minority interest			5,269,000			12,189,000
Minority interest				(1,125,000	)		(3,527,000	)
	Net income		$	4,144,000		$	8,662,000
Basic earnings per share of common stock (Note 3)			$	.14		$	.29
Diluted earnings per share of common stock (Notes 3 and 7)			$	.13		$	.27

See notes to condensed consolidated financial statements.

3

---

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

			Six Months Ended March 31,
			2005			2004
Net sales			$	662,647,000		$	656,138,000
Cost of sales				497,035,000			466,489,000
	Gross profit			165,612,000			189,649,000
Selling, general and administrative expenses				140,175,000			141,649,000
	Income from operations			25,437,000			48,000,000
Other income (expense):
	Interest expense			(4,165,000	)		(4,090,000	)
	Interest income			1,155,000			481,000
	Other, net			1,229,000			615,000
				(1,781,000	)		(2,994,000	)
	Income before income taxes			23,656,000			45,006,000
Provision for income taxes (Notes 6 and 7)				7,327,000			16,652,000
	Income before minority interest			16,329,000			28,354,000
Minority interest				(2,993,000	)		(6,577,000	)
	Net income		$	13,336,000		$	21,777,000
Basic earnings per share of common stock (Note 3)			$	.45		$	.73
Diluted earnings per share of common stock (Notes 3 and 7)			$	.43		$	.69

See notes to condensed consolidated financial statements.

4

---

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

					Six Months Ended March 31,
					2005			2004
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income					$	13,336,000		$	21,777,000
	Adjustments to reconcile net income to net cash provided by operating activities:
		Depreciation and amortization				15,272,000			14,097,000
		Minority interest				2,993,000			6,577,000
		Provision for losses on accounts receivable				867,000			928,000
		Change in assets and liabilities:
			Decrease in accounts receivable and contract costs and recognized income not yet billed			18,537,000			24,211,000
			(Increase) decrease in inventories			4,467,000			(19,339,000	)
			(Increase) decrease in prepaid expenses and other assets			2,497,000			(4,638,000	)
			Decrease in accounts payable, accrued liabilities and income taxes			(27,040,000	)		(3,285,000	)
			Other changes, net			3,586,000			2,789,000
	Total adjustments					21,179,000			21,340,000
		Net cash provided by operating activities				34,515,000			43,117,000
CASH FLOWS FROM INVESTING ACTIVITIES:
	Acquisition of property, plant and equipment					(22,533,000	)		(24,333,000	)
	Acquisition of minority interest in subsidiary					(3,883,000	)		—
	Acquired businesses					(9,235,000	)		—
	(Increase) decrease in equipment lease deposits					3,314,000			(10,831,000	)
		Net cash used in investing activities				(32,337,000	)		(35,164,000	)
CASH FLOWS FROM FINANCING ACTIVITIES:
	Purchase of shares for treasury					(7,946,000	)		(15,211,000	)
	Proceeds from issuance of long-term debt					7,778,000			3,774,000
	Payments of long-term debt					(9,040,000	)		(8,200,000	)
	Decrease in short-term borrowings					(44,000	)		—
	Distributions to minority interest					(988,000	)		(4,992,000	)
	Exercise of stock options					4,137,000			4,610,000
	Other, net					—			(61,000	)
		Net cash used in financing activities				(6,103,000	)		(20,080,000	)
Effect of exchange rates on cash and cash equivalents						533,000			851,000
NET DECREASE IN CASH AND CASH EQUIVALENTS						(3,392,000	)		(11,276,000	)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD						88,047,000			69,816,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD					$	84,655,000		$	58,540,000

See notes to condensed consolidated financial statements.

5

---

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(1)

Basis of Presentation—

        The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement have been included. Operating results for the three-month and six-month periods ended March 31, 2005 are not necessarily indicative of the results that may be expected for the year ending September 30, 2005. The balance sheet at September 30, 2004 has been derived from the audited financial statements at that date. For further information, refer to the consolidated financial statements and footnotes thereto included in the company's annual report to shareholders for the year ended September 30, 2004.

(2)

Inventories—

        Inventories, stated at the lower of cost (first-in, first-out or average) or market, are comprised of the following:

(3)

Earnings per share (EPS) and accounting for stock-based compensation—

        Basic EPS is calculated by dividing income by the weighted average number of shares of common stock outstanding during the period. The weighted average number of shares of common stock used in determining basic EPS was 29,387,000 and 29,900,000 for the three months ended March 31, 2005 and 2004, respectively, and 29,318,000 and 29,860,000 for the six months ended March 31, 2005 and 2004, respectively.

        Diluted EPS is calculated by dividing income by the weighted average number of shares of common stock outstanding plus additional common shares that could be issued in connection with potentially dilutive securities. Holders of the company's 4% convertible subordinated notes are entitled to convert their notes into the company's common stock upon the occurrence of certain events described in Note 2 of Notes to Consolidated Financial Statements in the company's annual report to shareholders for the year ended September 30, 2004.

        The weighted average number of shares of common stock used in determining diluted EPS was 31,179,000 and 31,773,000 for the three months ended March 31, 2005 and 2004, respectively, and 31,172,000 and 31,753,000 for the six months ended March 31, 2005 and 2004, respectively, and reflects additional shares issuable in connection with stock option and other stock-based compensation plans. Shares potentially issuable upon conversion of the notes are determined using the "treasury stock" method (see Note 7) and had no effect for the three and six-month periods ended March 31, 2004 and an insignificant effect on the calculation of diluted earnings per share for the three and six-month periods ended March 31, 2005.

6

---

        Statement of Financial Accounting Standards No. 123, "Accounting for Stock-Based Compensation", as amended by Statement of Financial Accounting Standards No. 148, "Accounting for Stock-Based Compensation—Transition and Disclosure", permits an entity to continue to account for employee stock-based compensation under APB Opinion No. 25, "Accounting for Stock Issued to Employees", or adopt a fair value based method of accounting for such compensation. Prior to the effective date of Statement of Financial Accounting Standards No. 123R, "Share-Based Payment", the company has accounted for stock-based compensation under Opinion No. 25 (see Note 7 for a discussion of the new accounting standard that requires fair value measurement and recognition of compensation cost in connection with stock options). Accordingly, no compensation expense has been recognized in connection with options granted. Had compensation expense for options granted been determined based on the fair value at the date of grant in accordance with Statement No. 123, the company's net income and earnings per share would have been as follows:

			Three Months Ended March 31,						Six Months Ended March 31,
			2005			2004			2005			2004
Net income, as reported			$	4,144,000		$	8,662,000		$	13,336,000		$	21,777,000
Deduct total stock-based employee compensation expense determined under fair value based method for all awards, net of related tax effects				(1,854,000	)		(496,000	)		(2,375,000	)		(1,083,000	)
Pro forma net income			$	2,290,000		$	8,166,000		$	10,961,000		$	20,694,000
Earnings per share:
	Basic—as reported		$	.14		$	.29		$	.45		$	.73
	Basic—pro forma		$	.08		$	.27		$	.37		$	.69
	Diluted—as reported		$	.13		$	.27		$	.43		$	.69
	Diluted—pro forma		$	.07		$	.25		$	.35		$	.65

(4)

Business segments and acquisitions—

        The company's reportable business segments are as follows—Garage Doors (manufacture and sale of residential and commercial/industrial garage doors, and related products); Installation Services (sale and installation of building products primarily for new construction, such as garage doors, garage door openers, manufactured fireplaces and surrounds, flooring and cabinets); Electronic Information and Communication Systems (communication and information systems for government and commercial markets) and Specialty Plastic Films (manufacture and sale of plastic films and film laminates for baby diapers, adult incontinence care products, disposable surgical and patient care products and plastic packaging).

7

---

        Information on the company's business segments is as follows:

			Garage Doors			Installation Services			Specialty Plastic Films			Electronic Information and Communication Systems			Totals
Revenues from external customers—
Three months ended
	March 31, 2005		$	105,104,000		$	66,483,000		$	94,533,000		$	56,353,000		$	322,473,000
	March 31, 2004			91,457,000			72,307,000			106,613,000			47,259,000			317,636,000
Six months ended
	March 31, 2005		$	235,291,000		$	138,736,000		$	185,865,000		$	102,755,000		$	662,647,000
	March 31, 2004			207,650,000			148,975,000			210,614,000			88,899,000			656,138,000
Intersegment revenues—
Three months ended
	March 31, 2005		$	5,070,000		$	25,000		$	—		$	—		$	5,095,000
	March 31, 2004			4,636,000			25,000			—			—			4,661,000
Six months ended
	March 31, 2005		$	10,590,000		$	61,000		$	—		$	—		$	10,651,000
	March 31, 2004			10,303,000			62,000			—			—			10,365,000
Segment profit—
Three months ended
	March 31, 2005		$	749,000		$	1,287,000		$	6,220,000		$	3,397,000		$	11,653,000
	March 31, 2004			3,964,000			1,692,000			15,142,000			3,669,000			24,467,000
Six months ended
	March 31, 2005		$	11,398,000		$	2,576,000		$	14,818,000		$	5,921,000		$	34,713,000
	March 31, 2004			17,224,000			4,698,000			28,082,000			5,699,000			55,703,000

        Following is a reconciliation of segment profit to amounts reported in the consolidated financial statements:

        Unallocated amounts include general corporate expenses not attributable to any reportable segment. Goodwill at March 31, 2005 includes $12.9 million attributable to the garage doors segment, $21.8 million to the electronic information and communication systems segment and $27.3 million to the specialty plastic films segment. During the first quarter of fiscal 2005 the ownership interest in the company's subsidiary in Brazil was increased from 60% to 90%. This additional investment of approximately $3.9 million increased goodwill of the specialty plastic films segment by $2.5 million. During the second quarter of fiscal 2005 the electronic information and communication systems segment acquired two businesses for an aggregate of approximately $9.5 million that complement

8

---

existing communications product lines and enhance the segment's research and development and customer support capabilities. These acquisitions increased goodwill by approximately $7.5 million. The purchase price of these businesses was allocated to goodwill and to acquired assets and liabilities based upon preliminary estimates. These allocations and estimates are subject to revision when the company receives further information, including appraisals and other analyses. The remainder of the increase in goodwill was due to specialty plastic films' currency translation adjustments.

(5)

Comprehensive income and defined benefit pension expense—

        Comprehensive income, which consists of net income and foreign currency translation adjustments, was $2.1 and $7.7 million for the three-month periods and $16.8 and $24.0 million for the six-month periods ended March 31, 2005 and 2004.

        Defined benefit pension expense was recognized as follow:

(6)

Provision for income taxes—

        The provision for income taxes for the quarter and six months ended March 31, 2005 was reduced to reflect a lower projected annual effective tax rate. The lower rate encompasses revised projections of the company's domestic and foreign tax positions for fiscal 2005 as a result of the effects of the raw material price escalation and reassessments of other income tax matters.

(7)

Recent accounting pronouncements—

        The Emerging Issues Task Force consensus on Issue 04-8, "The Effect of Contingently Convertible Instruments on Diluted Earnings per Share," became effective for the company's first quarter of fiscal 2005 and requires contingently convertible debt to be included in the calculation of diluted earnings per share even though related market based contingencies have not been met. Holders of the company's 4% convertible subordinated notes are entitled to convert their notes upon the occurrence of certain events and on the terms described in Note 2 of Notes to Consolidated Financial Statements in the company's annual report to shareholders for the year ended September 30, 2004. Shares potentially issuable upon conversion are included in the calculation of diluted earnings per share using the "treasury stock" method. Adoption of Issue 04-8 did not affect the company's fiscal 2004 or previously reported diluted earnings per share amounts since the issuance of the notes in July 2003.

        In October 2004 the American Jobs Creation Act of 2004 (the "Act") was signed into law. The new law provides for phased elimination of the Foreign Sales Corporation/Extraterritorial Income tax deduction over 2005 and 2006, and also creates a new deduction for qualified domestic production activities that is phased in from 2006 through 2010. The Act also creates a temporary incentive for multinational corporations to repatriate earnings of foreign subsidiaries. The Financial Accounting

9

---

Standards Board (FASB) has issued staff positions FAS 109-1, "Application of FASB Statement No. 109, Accounting for Income Taxes, to the Tax Deduction on Qualified Production Activities Provided by the American Jobs Creation Act of 2004" and FAS 109-2, "Accounting and Disclosure Guidance for the Foreign Earnings Repatriation Provision within the American Jobs Creation Act of 2004." FAS 109-1 requires that tax benefits attributable to deductions for qualified domestic production activities should be recognized in the financial statements in the period in which the deductions are taken in the company's tax return. Adoption of FAS 109-1 had no effect on existing deferred tax assets and liabilities. FAS 109-2 provides additional time beyond the financial reporting period containing the Act's enactment date for companies to evaluate the effects of the Act in applying SFAS 109 with respect to the repatriation of undistributed foreign earnings. The company's evaluation of the potential impact of this complex legislation on its plans for reinvestment or repatriation of undistributed foreign earnings is not yet completed and additional interpretations are expected from the Department of the Treasury. Accordingly, the company is not yet in a position to decide on whether, and to what extent, it might repatriate undistributed foreign earnings pursuant to the Act. The company anticipates that its evaluation will be completed by the third quarter of fiscal 2005.

        The FASB has also issued Statement of Financial Accounting Standards Nos. 151, "Inventory Costs"; 152, "Accounting for Real Estate Time-Sharing Transactions"; 153, "Exchanges of Nonmonetary Assets"; and Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations." SFAS 151 requires that abnormal amounts of idle facility expense, freight, handling costs and spoilage be recognized as period charges and becomes effective in fiscal 2006. SFAS 152 requires that real estate time-sharing transactions be accounted for pursuant to the AICPA Statement of Position, "Accounting for Real Estate Time-Sharing Transactions" rather than SFAS 66 and SFAS 67 and becomes effective in fiscal 2006. SFAS No. 153 replaces the exception from fair value measurement for nonmonetary exchanges of similar productive assets with an exception for exchanges that do not have commercial substance and becomes effective in fiscal 2006. Interpretation 47 clarifies when certain asset retirement obligations should be recognized and becomes effective in fiscal 2006. The company does not believe that the adoption of SFAS 151, SFAS 152, SFAS 153 and Interpretation 47 will have a material effect on the company's consolidated financial position, results of operations or cash flows.

        The FASB also issued SFAS 123R, "Share-Based Payment." SFAS 123R requires that compensation costs relating to share-based payment transactions be recognized in the financial statements based upon fair value, eliminates the option to continue to account for such compensation under APB Opinion No. 25 and, pursuant to SEC Release 33-8568, becomes effective in the first quarter of fiscal 2006. The company intends to adopt this pronouncement using modified prospective application and previously reported operating results and earnings per share amounts will remain unchanged. As permitted by SFAS 123, the company currently accounts for compensation costs related to stock options under Opinion 25. Upon adoption, SFAS 123R will result in additional compensation cost recognized in the income statement (see Note 3), and changes the manner of presenting certain tax benefits in the statement of cash flows. Operating results of future periods will be affected by compensation cost attributable to the fair value of unvested options at the date of SFAS 123R adoption (approximately $600,000 for unvested options outstanding as of March 31, 2005) and the fair value of subsequent option grants as determined pursuant to SFAS 123R. Fair value and related compensation cost for stock options under SFAS 123R will be based upon a number of estimates including the expected term of the option, risk-free interest rates for the expected term, expected dividend-yield of the underlying stock and the expected volatility in the price of the underlying stock. Fair value and related compensation cost estimates for stock options will also be dependent on the number of options granted and the market price of the underlying stock at the date of grant.

10

---

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION

AND RESULTS OF OPERATIONS

OVERVIEW

        Net sales for the quarter ended March 31, 2005 were $322,473,000, up from $317,636,000 for the second quarter of fiscal 2004. Income before income taxes was $6,101,000 compared to $19,348,000 last year. Net income was $4,144,000 compared to $8,662,000 last year.

        Operating results in the second quarter were impacted by the continued raw material price escalation in the specialty plastic films and garage doors segments. Although the company has continued to raise selling prices in both of these segments, the raw material cost increases have not been fully recovered. In specialty plastic films, raw material (resin) costs increased over first quarter levels in North America and advanced more sharply in Europe. Overall, resin prices increased by approximately 5% compared to the first quarter and by approximately 40% compared to last year. It is estimated that resin cost movement produced a negative impact on operating results of approximately $2 to $3 million in the quarter. In the garage doors segment, coil and hardware steel costs increased, with coil steel costs increasing over first quarter levels by approximately 27% and hardware steel costs rising over 60% during the last twelve months. The upsurge in steel costs negatively impacted the quarter's operating results by approximately $4 to $5 million. Raw material prices appear to have stabilized in both segments and the company anticipates improved operating results in the near term.

        Due primarily to product design changes by its major customer, specialty plastic films experienced lower unit volume that also reduced profitability. The customer is using a narrower, printed film product designed to meet its changing needs, instead of the film laminate product previously supplied by the segment. The conversion to the new printed film began in 2004 and has now been completed.

        The specialty plastic films segment continued to execute its capital expansion program. It is expected that a new production line will come on-stream in Europe in the third quarter, and additional expenditures in connection with capacity additions in Europe and Brazil will be made throughout the remainder of 2005. These investments, which incorporate engineering and technology upgrades, are expected to provide for future geographic expansion and development of new markets.

RESULTS OF OPERATIONS

        See Note 4 of Notes to Condensed Consolidated Financial Statements.

THREE MONTHS ENDED MARCH 31, 2005

        Operating results (in thousands) by business segment were as follows for the three-month periods ended March 31:

11

---

Garage Doors

        Net sales of the garage doors segment increased by $14.1 million compared to last year. The sales growth was principally due to selling price increases ($10 million) that partially passed the effect of raw material cost increases to customers. The remainder of the sales increase was primarily due to favorable product mix.

        Operating profit of the garage door segment decreased $3.2 million compared to last year. Gross margin percentage fell to 25.3% for the quarter compared to 32.1% last year. Selling price increases did not fully recover the cost increases, negatively impacting the segment's gross margin and operating profit by $4 to $5 million. Favorable product mix positively affected gross margin and operating profit by approximately $2 million. Selling, general and administrative expenses were approximately the same as last year but, as a percentage of sales, declined to 24.6% from 28.0% last year due to the sales increase.

Installation Services

        Net sales of the installation services segment decreased by $5.8 million compared to last year. The lower sales resulted from a weaker construction environment in certain of the segment's markets, increased competition and the elimination towards the end of last year of an underperforming location.

        Operating profit of the installation services segment decreased $.4 million compared to last year. Gross margin percentage decreased to 26.5% from 27.7% last year principally due to higher costs attributable to products with significant steel content (garage doors and fireplaces) and narrower margins due to the competitive market conditions. Selling, general and administrative expenses decreased compared to the prior year principally due to the lower sales and the elimination of an underperforming location. Selling, general and administrative expenses as a percentage of sales was 24.6% compared to 25.5% last year.

Specialty Plastic Films

        Net sales of the specialty plastic films segment decreased $12.1 million compared to last year. The decrease was principally due to lower unit volume ($18 million) related to product design changes by the segment's major customer, partly offset by the effect ($6 million) of selling price adjustments to partially pass increased raw material costs to customers.

        Operating profit of the specialty plastic films segment decreased $8.9 million compared to last year. Gross margin percentage decreased to 19.9% from 26.7% last year. The lower gross margin and operating profit reflected the effect ($6 to $7 million) of lower unit volume and the negative impact ($2 to $3 million) of higher raw material costs. Selling, general and administrative expenses were relatively flat compared to last year but as a percentage of sales increased to 13.3% from 12.5% last year due to the sales decrease.

Electronic Information and Communication Systems

        Net sales of the electronic information and communication systems segment increased $9.1 million compared to last year. The sales increase was principally attributable to growth in international radar programs.

        Operating profit of the electronic information and communication systems segment decreased $.3 million principally due to operating costs associated with acquired companies. Gross margin percentage decreased to 22.8% from 26.0% last year, principally due to lower margins on certain development programs and higher margins last year on certain commercial product lines. The effect of the lower gross margin percentage was offset by the sales increase. Selling, general and administrative

12

---

expenses increased over last year principally due to the acquisitions but as a percentage of sales was 17.1% compared to 18.4% last year due to the sales increase.

Provision for income taxes

        The provision for income taxes for the quarter ended March 31, 2005 was reduced to reflect a lower projected annual effective tax rate. The lower rate encompasses revised projections of the company's domestic and foreign tax positions for fiscal 2005 as a result of the effects of the raw material price escalation and reassessments of other income tax matters.

SIX MONTHS ENDED MARCH 31, 2005

        Operating results (in thousands) by business segment were as follows for the six-month periods ended March 31:

Garage Doors

        Net sales of the garage doors segment increased by $27.9 million compared to last year. The sales growth was principally due to selling price increases ($20 million) that partially passed the effect of raw material cost increases to customers. The remainder of the sales increase was primarily due to favorable product mix.

        Operating profit of the garage doors segment decreased $5.8 million compared to last year. Gross margin percentage in the first six months of fiscal 2005 was 27.6% compared to 33.2% for last year's first half. Selling price increases did not keep pace with the cost increases, negatively impacting the segment's gross margin and operating profit by approximately $7 to $8 million. Favorable product mix positively affected gross margin and operating profit by approximately $4 million. Selling, general and administrative expenses increased primarily due to higher marketing and distribution costs compared to last year but, as a percentage of sales, declined to 23.0% from 25.3% last year due to the sales increase.

Installation Services

        Net sales of the installation services segment decreased by $10.2 million compared to last year. The lower sales resulted from a weaker construction environment in certain of the segment's markets, increased competition and last year's elimination of an underperforming location.

        Operating profit of the installation services segment decreased $2.1 million compared to last year. Narrower margins due to the competitive market conditions and higher costs attributable to products with significant steel content (garage doors and fireplaces) reduced the gross margin percentage to 26.3% from 27.8% last year and negatively impacted operating profit. These decreases were partly offset by lower selling, general and administrative expenses primarily due to the sales decrease and the

13

---

elimination of an underperforming location. Selling, general and administrative expenses as a percentage of sales was 24.6% compared to 24.7% last year.

Specialty Plastic Films

        Net sales of the specialty plastic films segment decreased $24.7 million compared to last year. The decrease was principally due to lower unit volume ($38 million) related to product design changes by the segment's major customer, partly offset by the effect ($10 million) of selling price adjustments to partially pass increased raw material costs to customers.

        Operating profit of the specialty plastic films segment decreased $13.3 million compared to last year. Gross margin percentage decreased to 20.7% from 25.6% last year. The lower gross margin and operating profit reflected the effect (approximately $13 million) of lower unit volume and the negative impact ($6 to $7 million) of higher raw material costs, partly offset by the positive effect of exchange rate differences and other items ($5 million). Operating profit was positively affected ($2 million) by lower selling, general and administrative expenses which as a percentage of sales increased to 13.2% from 12.5% last year due to the sales decrease.

Electronic Information and Communication Systems

        Net sales of the electronic information and communication systems segment increased $13.9 million compared to last year. The sales increase was principally attributable to growth in defense and international radar programs.

        Operating profit of the electronic information and communication systems segment increased $.2 million compared to last year. Gross margin percentage decreased to 21.9% from 24.1% last year, principally due to lower margins on certain development programs and higher margins last year on certain commercial product lines. The effect of the lower gross margin percentage was offset by the sales increase. Selling, general and administrative expenses increased over last year principally due to acquisitions but as a percentage of sales was 16.5% compared to 18.1% last year due to the sales increase.

Provision for income taxes

        The provision for income taxes for the six months ended March 31, 2005 was reduced to reflect a lower projected annual effective tax rate. The lower rate encompasses revised projections of the company's domestic and foreign tax positions for fiscal 2005 as a result of the effects of the raw material price escalation and reassessments of other income tax matters.

LIQUIDITY AND CAPITAL RESOURCES

        Cash flow generated by operations for the six months ended March 31, 2005 was $34.5 million compared to $43.1 million last year and working capital was $266.5 million at March 31, 2005. Operating cash flows decreased compared to last year due primarily to reduced profitability and changes in operating assets and liabilities.

        During the six months ended March 31, 2005 the company had capital expenditures of approximately $22.5 million, the majority of which were in connection with specialty plastic films' capital expansion program. Additional expenditures in connection with this segment's capacity additions in Europe and Brazil will be made throughout 2005. The company acquired two businesses for the electronic information and communications segment for an aggregate of approximately $9.5 million and also made an additional $3.9 million investment in specialty plastic films' subsidiary in Brazil, increasing its ownership interest from 60% to 90%.

14

---

        Financing cash flows included purchases of stock for treasury of $7.9 million to acquire approximately 331,000 shares of the company's common stock. Approximately 1,700,000 additional shares are available for purchase pursuant to the company's stock buyback program, and additional purchases under the plan will be made, depending upon market conditions, at prices deemed appropriate by management.

        Anticipated cash flows from operations, together with existing cash, bank lines of credit and lease line availability, should be adequate to finance presently anticipated working capital and capital expenditure requirements and to repay long-term debt as it matures.

CRITICAL ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS

        The company's significant accounting policies are set forth in Note 1 of Notes to Consolidated Financial Statements in the company's annual report to shareholders for the year ended September 30, 2004. A discussion of those policies that require management judgment and estimates and are most important in determining the company's operating results and financial condition are discussed in Management's Discussion and Analysis of Financial Condition and Results of Operations contained in the 2004 Annual Report.

        The Financial Accounting Standards Board has issued a number of financial accounting standards, staff positions and emerging issues task force consensus. See Note 7 of Notes to Condensed Consolidated Financial Statements for a discussion of these matters.

FORWARD-LOOKING STATEMENTS

        All statements other than statements of historical fact included in this report, including without limitation statements regarding the company's financial position, business strategy, and the plans and objectives of the company's management for future operations, are forward-looking statements. When used in this report, words such as "anticipate", "believe", "estimate", "expect", "intend" and similar expressions, as they relate to the company or its management, identify forward-looking statements. Such forward-looking statements are based on the beliefs of the company's management, as well as assumptions made by and information currently available to the company's management. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors, including but not limited to, business and economic conditions, competitive factors and pricing pressures, capacity and supply constraints. Such statements reflect the views of the company with respect to future events and are subject to these and other risks, uncertainties and assumptions relating to the operations, results of operations, growth strategy and liquidity of the company. Readers are cautioned not to place undue reliance on these forward-looking statements. The company does not undertake any obligation to release publicly any revisions to these forward-looking statements to reflect future events or circumstances or to reflect the occurrence of unanticipated events.

QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

        Management does not believe that there is any material market risk exposure with respect to derivative or other financial instruments that is required to be disclosed.

CONTROLS AND PROCEDURES

        Under the supervision and with the participation of our Chief Executive Officer ("CEO") and Chief Financial Officer ("CFO"), the company's disclosure controls and procedures were evaluated as of the end of the period covered by this report. Based on that evaluation, the company's CEO and CFO concluded that the company's disclosure controls and procedures were effective.

15

---

        During the period covered by this report there were no changes in the company's internal control over financial reporting which are reasonably likely to materially affect the company's ability to record, process, summarize and report financial information except as described below. In connection with the preparation of the consolidated financial statements for the second quarter of fiscal 2005, the company ascertained that there was an inventory valuation error in determining the garage door segment's cost of goods sold. This inventory valuation error was caused by unprecedented increases in the segment's raw material costs and a control deficiency in the application of raw material purchase price variances. The correction of this error was included in the press release which previously reported operating results for the second quarter of 2005. However, the company has since determined to reflect the adjustment to correct cost of goods sold in the first quarter of 2005 by restating that period's operating results. The company concluded that the error was not a material weakness at March 31, 2005 because additional control procedures, including the timely review of raw material purchase price variances, were implemented during the period covered by this report, which procedures are designed to provide reasonable assurance that such an error will not recur. Based on the above, the company concludes that its disclosure controls and procedures were effective at March 31, 2005.

Limitations on the Effectiveness of Controls

        We believe that a control system, no matter how well designed and operated, cannot provide absolute assurance that the objectives of the control system are met, and no evaluation of controls can provide absolute assurance that all controls issues and instances of fraud, if any, within a company have been detected. Our disclosure controls and procedures are designed to provide a reasonable assurance of achieving their objectives and our Chief Executive Officer and Chief Financial Officer have concluded that our controls and procedures are effective at the "reasonable assurance" level.

PART II—OTHER INFORMATION

Item 1    Legal Proceedings

        None

Item 2    Unregistered Sales of Equity Securities and Use of Proceeds

(c)

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

---

(1)

Includes 73,514 shares acquired in connection with the exercise of stock options.



(2)

All purchases were made in open market transactions. The company's stock buyback program has been in effect since 1993, under which a total of 15.4 million shares have been purchased for $191.0 million.

Item 3    Defaults upon Senior Securities

        None

Item 4    Submission of Matters to a Vote of Security Holders

(a)

The Registrant held its Annual Meeting of Stockholders on February 16, 2005.

16

---

(b)

Not applicable



(c)

Five directors were elected at the Annual Meeting to serve until the Annual Meeting of Stockholders in 2008. The names of these directors and votes cast in favor of their election and shares withheld are as follows:

Item 5    Other Information

        None

Item 6    Exhibits

Exhibit 31.1—Certification pursuant to Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 31.2—Certification pursuant to Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act 2002.

Exhibit 32—Certifications pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

17

---

SIGNATURE

        Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		GRIFFON CORPORATION
		By	/s/  ERIC EDELSTEIN       Eric Edelstein Executive Vice President and Chief Financial Officer (Principal Financial Officer)

Date: May 12, 2005

18

---

QuickLinks

CONTENTS
GRIFFON CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)
GRIFFON CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)
GRIFFON CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)
GRIFFON CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)
GRIFFON CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)
GRIFFON CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
PART II—OTHER INFORMATION
SIGNATURE

QuickLinks -- Click here to rapidly navigate through this document

Exhibit 31.1

CERTIFICATION

I, Harvey R. Blau, Chairman of the Board and Chief Executive Officer of Griffon Corporation, certify that:

1.

I have reviewed this quarterly report on Form 10-Q of Griffon Corporation;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.

The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)

Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

c)

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.

The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 12, 2005

		By	/s/  HARVEY R. BLAU
			Harvey R. Blau Chairman of the Board and Chief Executive Officer (Principal Executive Officer)

---

QuickLinks

CERTIFICATION

QuickLinks -- Click here to rapidly navigate through this document

Exhibit 31.2

CERTIFICATION

I, Eric Edelstein, Executive Vice President and Chief Financial Officer of Griffon Corporation, certify that:

1.

I have reviewed this quarterly report on Form 10-Q of Griffon Corporation;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.

The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)

Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

c)

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.

The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 12, 2005

		By	/s/  ERIC EDELSTEIN
			Eric Edelstein Executive Vice President and Chief Financial Officer (Principal Financial Officer)

---

QuickLinks

CERTIFICATION

QuickLinks -- Click here to rapidly navigate through this document

Exhibit 32

CERTIFICATIONS PURSUANT TO
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

        I, Harvey R. Blau, Chief Executive Officer of Griffon Corporation, hereby certify that the Form 10-Q of Griffon Corporation for the period ended March 31, 2005 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of Griffon Corporation.

/s/  HARVEY R. BLAU
Name: Harvey R. Blau
Date: May 12, 2005

        I, Eric Edelstein, Chief Financial Officer of Griffon Corporation, hereby certify that the Form 10-Q of Griffon Corporation for the period ended March 31, 2005 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of Griffon Corporation.

/s/  ERIC EDELSTEIN
Name: Eric Edelstein
Date: May 12, 2005

        A signed original of this written statement required by Section 906 has been provided to Griffon Corporation and will be retained by Griffon Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

---

QuickLinks

CERTIFICATIONS PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002