Trex Company, Inc. (the “Company”) is the world’s largest manufacturer of wood-alternative decking and railing products, which are marketed under the brand name Trex^®. The Company is incorporated in Delaware. The principal executive offices are located at 160 Exeter Drive, Winchester, Virginia 22603, and the telephone number at that address is (540) 542-6300. The Company operates in one business segment.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the accompanying condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments (consisting of normal and recurring adjustments) considered necessary for a fair presentation have been included in the accompanying condensed consolidated financial statements. The consolidated results of operations for the six months ended June 30, 2013 are not necessarily indicative of the results that may be expected for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements as of December 31, 2012 and 2011 and for each of the three years in the period ended December 31, 2012 included in the annual report of Trex Company, Inc. on Form 10-K, as filed with the Securities and Exchange Commission.

The Company’s critical accounting policies are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.

Inventories, at LIFO (last-in, first-out) value, consist of the following (in thousands):

Under the LIFO method, reductions in inventory cause a portion of the Company’s cost of sales to be based on historical costs rather than current year costs. The Company recognized no benefit during the six months ended June 30, 2013 compared to a $0.9 million benefit during the six months ended June 30, 2012 due to a reduction in inventory.

An actual valuation of inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs. Since inventory levels and costs are subject to factors beyond management’s control, interim results are subject to the final year-end LIFO inventory valuation.

Accrued expenses consist of the following (in thousands):

The Company’s outstanding debt consists of a revolving credit facility.

Revolving Credit Facility

On January 6, 2012, the Company entered into an Amended and Restated Credit Agreement (the “Credit Agreement”) with Branch Banking and Trust Company (“BB&T”), Wells Fargo Capital Finance, LLC and BB&T Capital Markets (the “Lenders”). Under the Credit Agreement, the Lenders agreed to provide the Company with one or more revolving loans in a collective maximum principal amount of $100 million. The Credit Agreement replaced the previous revolving credit facility in its entirety.

On February 26, 2013, the Company, as borrower; BB&T, as Administrative Agent and as a Lender; and Wells Fargo Capital Finance, LLC, as a Lender; entered into a First Amendment (“First Amendment”) to their Amended and Restated Credit Agreement dated as of January 6, 2012. Pursuant to the First Amendment, the Credit Agreement was amended to temporarily increase the maximum amount of the revolving loans from $100 million to $125 million during the period from February 26, 2013 through and including June 30, 2013, and reduce certain interest rate margins and costs. In conjunction with the First Amendment, the Revolver Notes executed by the Company to each of BB&T and Wells Fargo dated as of January 6, 2012 were amended and restated.

Amounts drawn under the Credit Agreement are subject to a borrowing base consisting of certain accounts receivables, inventories, machinery and equipment and real estate. At June 30, 2013, the Company had no outstanding borrowings under its revolving credit facility and available borrowing capacity of approximately $78.4 million.

Compliance with Debt Covenants and Restrictions

The Company’s ability to make scheduled principal and interest payments and to borrow and repay amounts under any outstanding revolving credit facility, and continue to comply with any loan covenants depends primarily on the Company’s ability to generate sufficient cash flow from operations.

As of June 30, 2013, the Company was in compliance with all of the covenants contained in its debt agreements. Failure to comply with the loan covenants might cause lenders to accelerate the repayment obligations under the credit facility, which may be declared payable immediately based on a default.

The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities to approximate the fair value of the respective assets and liabilities at June 30, 2013 and December 31, 2012.

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share and per share data):

Diluted earnings per share is computed using the weighted average number of shares determined for the basic earnings per share computation plus the dilutive effect of common stock equivalents using the treasury stock method. The computation of diluted earnings per share excludes the following potentially dilutive securities because the effect would be anti-dilutive:

The Company has one stock-based compensation plan, the 2005 Stock Incentive Plan (the “Plan”). The Plan is administered by the Compensation Committee of the Company’s Board of Directors. Stock-based compensation is granted to officers, directors and certain key employees in accordance with the provisions of the Plan. The Plan provides for grants of stock options, stock appreciation rights (“SARs”), restricted stock and performance share awards. As of June 30, 2013, the total aggregate number of shares of the Company’s common stock that may be issued under the Plan is 3,150,000.

The fair value of each SAR is estimated on the date of grant using a Black-Scholes option-pricing formula. For SARs issued in the six months ended June 30, 2013 and 2012, respectively, the assumptions shown in the following table were used:

The following table summarizes the Company’s stock-based compensation grants for the six months ended June 30, 2013:

The following table summarizes the Company’s stock-based compensation expense for the three and six months ended June 30, 2013 and 2012 (in thousands):

Total unrecognized compensation cost related to unvested awards as of June 30, 2013 was $6.7 million. The cost of these unvested awards is being recognized over the requisite vesting period of each award.

The Company’s effective tax rate for the six months ended June 30, 2013 and 2012 was 1.0% and 0.9% respectively, which resulted in expense of $0.3 million and $0.2 million, respectively.

The Company continues to maintain a valuation allowance against its net deferred tax asset, the effect of which is to substantially reduce the Company’s effective tax rate as the tax expense or benefit recorded at the statutory tax rate is offset by a corresponding expense or benefit resulting from the change in the valuation allowance. As a result of the Company’s valuation allowance, its annual effective tax rate, and changes to it, is primarily a function of the Company’s expectations of the cash taxes paid to various jurisdictions as a result of taxable income exceeding available net operating loss carry-forwards or alternative minimum tax calculations. The Company expects cash taxes paid to be materially consistent with amounts paid in the prior period. The Company will analyze its position in subsequent reporting periods, considering all available positive and negative evidence, in determining the expected realization of its deferred tax assets.

The Company operates in multiple tax jurisdictions and, in the normal course of business, its tax returns are subject to examination by various taxing authorities. Such examinations may result in future assessments by these taxing authorities, and the Company has accrued a liability when it believes that it is more likely than not that benefits of tax positions will not be realized. The Company believes that adequate provisions have been made for all tax returns subject to examination. As of June 30, 2013, tax years 2009 through 2013 remain subject to examination by federal and certain state tax jurisdictions.

The Company’s operating results have historically varied from quarter to quarter, in part due to seasonal trends in the demand for Trex^®. The Company has historically experienced lower net sales during the fourth quarter because holidays and adverse weather conditions in certain regions reduce the level of home improvement and construction activity.

Contract Termination Costs

In anticipation of relocating its corporate headquarters, the Company entered into a lease agreement in 2005. The Company reconsidered and decided not to move its headquarters. The lease, which extends through June 30, 2019, obligates the Company to lease 55,047 square feet. As of June 30, 2013, the Company has executed subleases for the entire 55,047 square feet it currently leases. However, a sublease for 4,028 square feet expires on July 31, 2013. The Company is currently marketing this space to find a suitable tenant. The remaining subleases expire in late 2014 to 2019. The Company estimates that the present value of the estimated future sublease rental receipts, net of transaction costs, will be less than the Company’s remaining minimum lease payment obligations under its lease for the office space and has recorded a liability for the expected shortfall.

To estimate future sublease receipts for the periods beyond the term of the existing subleases, the Company has assumed that the existing subleases will be renewed or new subleases will be executed at rates consistent with rental rates in the current subleases. However, management cannot be certain that the timing of future subleases or the rental rates contained in future subleases will not differ from current estimates. Factors such as the availability of commercial office space, poor economic conditions and subtenant preferences will influence the terms achieved in future subleases. The inability to sublet the office space in the future or unfavorable changes to key management assumptions used in the estimate of the future sublease receipts may result in material charges to selling, general and administrative expenses in future periods.

As of June 30, 2013, the minimum payments remaining under the Company’s lease relating to its reconsidered corporate relocation over the years ending December 31, 2013, 2014, 2015, 2016 and 2017 are $0.8 million, $1.7 million, $1.7 million, $1.8 million and $1.8 million, respectively, and $2.8 million thereafter. The minimum receipts remaining under the Company’s existing subleases over the years ending December 31, 2013, 2014, 2015, 2016 and 2017 are $0.7 million, $1.6 million, $0.7 million, $0.7 million and $0.7 million, respectively, and $1.1 million thereafter.

The following table provides information about the Company’s liability related to the lease (in thousands):

Product Warranty

The Company warrants that its products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use. (With respect to TrexTrim™ and Trex Reveal™ Railing, the warranty period is 25 years for both residential and commercial use.) With respect to the Company’s Transcend^®, Enhance^® and Universal Fascia product, the Company further warrants that the product will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold (provided the stain is cleaned within seven days of appearance). This warranty extends for a period of 25 years for residential use and 10 years for commercial use. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price.

Historically, the Company has not had material numbers of claims submitted or settled under the provisions of its product warranties, with the exception of claims related to material produced at its Nevada facility prior to 2007 that exhibits surface flaking. The Company continues to receive and settle surface flaking claims and maintains a warranty reserve to provide for the settlement of these claims. In 2009, the Company agreed to a settlement of a class action lawsuit covering the surface defect, stipulating its responsibilities with regard to such claims. Estimating the warranty reserve for surface flaking claims requires management to estimate (1) the average cost to settle each claim and (2) the number of claims to be settled with payment, both of which are subject to variables that are difficult to estimate.

The cost per claim varies due to a number of factors, including the size of affected decks, the type of replacement material used, the cost of production of replacement material and the method of claim settlement. Although the cost per claim does vary, it is less volatile and more predictable than the number of claims to be settled with payment, which is inherently uncertain.

The key component driving the Company’s potential liability is the number of claims that will ultimately require payment. To estimate the ultimate count of future paid claims, the Company utilizes actuarial techniques to quantify both the expected number of claims to be received and the percentage of those claims that will ultimately require payment. Estimates for both of these elements (number and percentage of claims that will ultimately require payment) are quantified using a range of assumptions derived from the recent claim count history and the identification of factors influencing the claim counts, including the downward trend in received claims due to the passage of time since production of the suspect material. For each of the various parameters used in its analysis, the assumed values that drive the results represent the Company’s best estimate for the ultimate number of claims to be settled with payment.

A number of factors make estimates of the number of claims to be received inherently uncertain. The Company believes that production of the suspect material was confined to material produced from its Nevada facility prior to 2007, but is unable to determine the amount of suspect material produced or the exact time it takes for surface flaking to become evident in the suspect material and materialize as a claim. Furthermore, the aforementioned 2009 class action settlement and related public notices led to a significant spike in claims received in 2009 and disrupted the claims data and settlement patterns. Lastly, the Company is not aware of any analogous industry data that might be referenced in predicting future claims to be received.

The number of surface flaking claims received peaked in 2009 in conjunction with the class action settlement and then declined significantly in 2010 and 2011, consistent with the Company’s belief that the effect of the 2009 spike in claims was largely an acceleration of claims previously expected to be filed in future periods. As a result of the effects of the class action settlement and because the suspect material had not been produced since prior to 2007, the Company anticipated that the rate of decline in claims received would accelerate and the number of claims received would continue to decline significantly in 2012.

Due to extensive use of decks during the summer outdoor season, variance to annual claims expectations is typically observed during the latter part of the Company’s fiscal year. During the third quarter of 2012, based on an analysis of additional claims activity, the Company observed that the actual rate of decline in claims received in 2012 would fall short of its anticipated rate of decline. As a result, the Company revised its estimate of the future claims to be received to reflect a rate of decline that incorporated levels experienced in 2012. Although the number of claims received continues to decline each year, the effect of reducing the anticipated rate of decline increases the number of claims expected in future years. As a result of these changes in estimate, the Company recorded an increase to the warranty reserve of $20 million during the three months ended September 30, 2012.

The Company monitors surface flaking claims activity each quarter for indications that its estimate of the number of claims expected requires revision. Through the six months ended June 30, 2013, both the number of claims received and the cost per claim are unfavorable, while the number of claims settled with payment against the reserve is favorable. At June 30, 2013 the Company believes that claims information received to date provides evidence that its warranty reserve is sufficient to cover future surface flaking payment obligations.

The Company’s analysis is based on currently known facts and a number of assumptions. However, projecting future events such as the number of claims to be received, the number of claims that will require payment and the average cost of claims could cause the actual warranty liabilities to be higher or lower than those projected which could materially affect the Company’s financial condition, results of operations or cash flow. The Company estimates that the number of claims received will continue to decline over time. If the level of claims received does not diminish consistent with its expectations or if the cost to settle claims increases, it could result in additional increases to the warranty reserve and reduced earnings in future periods. The Company estimates that a 10% change in the expected number of remaining claims to be settled with payment or the expected cost to settle claims may result in approximately a $3.0 million change in the warranty reserve.

The following is a reconciliation of the Company’s warranty reserve (in thousands):

Legal Matters

As reported in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012, on January 19, 2009, a purported class action case was commenced against the Company in the Superior Court of California, Santa Cruz County, by the lead law firm of Lieff, Cabraser, Heimann & Bernstein, LLP and certain other law firms (the “Lieff Cabraser Group”) on behalf of Eric Ross and Bradley S. Hureth and similarly situated plaintiffs. These plaintiffs generally allege certain defects in the Company’s products, and that the Company has failed to provide adequate remedies for defective products. On February 13, 2009, the Company removed this case to the United States District Court, Northern District of California. On January 21, 2009, a purported class action case was commenced against the Company in the United States District Court, Western District of Washington by the law firm of Hagens Berman Sobol Shapiro LLP (“Hagens Berman”) on behalf of Mark Okano and similarly situated plaintiffs, generally alleging certain product defects in the Company’s products, and that the Company has failed to provide adequate remedies for defective products. This case was transferred by the Washington Court to the California Court as a related case to the Lieff Cabraser Group’s case.

On July 30, 2009, the U.S. District Court for the Northern District of California preliminarily approved a settlement of the claims of the lawsuit commenced by the Lieff Cabraser Group involving surface flaking of the Company’s product, and on March 15, 2010, it granted final approval of the settlement.

On March 25, 2010, the Lieff Cabraser Group amended its complaint to add claims relating to alleged defects in the Company’s products and alleged misrepresentations relating to mold growth. Hagens Berman has alleged similar claims in its original complaint. In its Final Order approving the surface flaking settlement, the District Court consolidated these pending actions relating to the mold claims, and appointed Hagens Berman as lead counsel in this case. On December 3, 2010, Hagens Berman filed an amended consolidated complaint in the United States District Court, Northern District of California relating to the mold growth claims (now on behalf of Dean Mahan and other named plaintiffs).

On December 15, 2010, a purported class action case was commenced against the Company in the United States District Court, Western District of Kentucky, by Cohen & Malad, LLP (“Cohen & Malad”) on behalf of Richard Levin and similarly situated plaintiffs in Kentucky, and on June 13, 2011, a purported class action was commenced against the Company in the Marion Circuit/Superior Court of Indiana by Cohen & Malad on behalf of Ellen Kopetsky and similarly situated plaintiffs in Indiana. On June 28, 2011, the Company removed the Kopetsky case to the United States District Court, Southern District of Indiana. On August 11, 2011, a purported class action was commenced against the Company in the 50^th Circuit Court for the County of Chippewa, Michigan on behalf of Joel and Lori Peffers and similarly situated plaintiffs in Michigan. On August 26, 2011, the Company removed the Peffers case to the United States District Court, Western District of Michigan. On April 4, 2012, a purported class action was commenced against the Company in Superior Court of New Jersey, Essex County by the lead law firm of Stull, Stull & Brody (the “Stull Group”) on behalf of Caryn Borger, M.D. and similarly situated plaintiffs in New Jersey. On May 1, 2012, the Company removed the Borger case to the United States District Court, District of New Jersey. The plaintiffs in these purported class actions generally allege certain defects in the Company’s products and alleged misrepresentations relating to mold growth.

On April 5, 2013, the Company signed a settlement agreement with Hagens Berman that would settle the case pending in the United States District Court, Northern District of California on a nationwide basis, and the parties filed for preliminary approval of such settlement (the “nationwide settlement”). The material terms of the nationwide settlement as set forth in the settlement agreement (and as modified as discussed later) are as follows:

The settlement agreement provides that the nationwide settlement would apply to any Trex first-generation non-shelled composite decking product purchased between August 1, 2004 and the date of preliminary approval of the nationwide settlement.

On April 19, 2013, Cohen & Malad and the Stull Group filed respective briefs with the Court objecting to the nationwide settlement. On May 28, 2013, the Court filed an Order requesting the parties to address certain issues raised by the Court with the proposed nationwide settlement. On June 14, 2013, the Company and Hagens Berman filed a joint brief with the Court agreeing to certain modifications of the settlement agreement to address the Court’s Order. The hearing for preliminary approval of the nationwide settlement is scheduled for August 23, 2013. The nationwide settlement is not final until the Court approves the settlement agreement. Although the Company agreed with Hagens Berman to modify the settlement agreement, the Court may, in its sole discretion, determine not to accept the nationwide settlement. If the Court does not approve the nationwide settlement, the settlement agreement will not be binding on the parties.

The Company denies all liability with respect to the facts and claims alleged. However, the Company is aware of the substantial burden, expense, inconvenience and distraction of continued litigation, and agreed to settle the litigation to avoid these. As of June 30, 2013, the Company has accrued a $3.4 million liability related to this litigation. It is reasonably possible that the Company may incur costs in excess of the recorded amounts; however, the Company expects that the total net cost to resolve the lawsuit will not exceed approximately $10 million.

The Company has other lawsuits, as well as other claims, pending against it which are ordinary routine litigation and claims incidental to the business. Management has evaluated the merits of these other lawsuits and claims, and believes that their ultimate resolution will not have a material effect on the Company’s consolidated financial condition, results of operations, liquidity or competitive position.