Owens Corning Q2 2026 Earnings: Flat Sales Came With Lower Margins

Owens Corning (NYSE: OC) reported Q2 2026 net sales from continuing operations of $2.756 billion, up less than 1% from $2.747 billion, while diluted EPS from continuing operations declined 2% to $3.84 from $3.91. For the quarter ended June 30 and reported August 5, continuing-operations net earnings attributable to OC fell 7% to $310 million and adjusted EBITDA margin narrowed to 24% from 26%, although full-company operating cash flow increased 22% to $398 million. Roofing and Insulation recorded higher sales, but EBITDA and margins declined across all three segments.

Core earnings data

The quarter featured broadly unchanged revenue but weaker profitability. Cost of sales increased faster than revenue, reducing gross profit, while lower operating expenses only partially offset the pressure. Cash generation moved in the opposite direction, with both operating and free cash flow improving.

Gross and operating margins above are calculated from the reported figures and are approximate. Adjusted EBITDA, adjusted EPS, and free cash flow are non-GAAP measures. Operating and free cash flow include discontinued operations, unlike the continuing-operations earnings measures.

Business and segment performance

Roofing and Insulation generated higher sales but converted less revenue into EBITDA. Doors posted the largest contraction, with sales, EBITDA, and margin all declining.

Roofing remained the largest earnings contributor, but its $10 million sales increase was accompanied by a $16 million EBITDA decline. Insulation delivered the fastest segment sales growth, yet its margin fell by two percentage points. Doors represented the clearest operating pressure, with EBITDA falling more sharply than revenue.

Owens Corning said it had achieved $135 million of enterprise run-rate cost synergies through work connected with the Doors business, exceeding its $125 million target for mid-2026. It also remains on track for another $75 million of structural cost improvements through network optimization and operating efficiencies. The reported Doors results show that segment profitability nevertheless remained under pressure during the quarter.

Segment figures are presented as reported and do not sum exactly to enterprise net sales.

Higher cost of sales narrowed margins while cash flow improved

Net sales increased by only $9 million, while cost of sales rose by $74 million to $1.963 billion. That reduced gross profit by $65 million and explains most of the contraction in profitability. Total operating expenses fell by $42 million to $311 million, partly reflecting the absence of the prior-year $24 million loss on a business sale and lower marketing and administrative expenses, limiting the decline in operating income to $23 million.

Cash flow provided a counterweight to the earnings pressure. Operating cash flow increased by $71 million and free cash flow rose by $70 million. Because Owens Corning defines free cash flow as operating cash flow less capital spending, the figures indicate capital expenditures of about $199 million in Q2 2026 and $198 million a year earlier. The improvement therefore came from higher operating cash generation rather than lower capital spending.

At June 30, cash and cash equivalents were $271 million, down from $345 million at December 31, 2025. Receivables increased to $1.508 billion from $937 million, while inventories decreased slightly to $1.455 billion from $1.472 billion. Combined current and long-term debt was approximately $5.125 billion, essentially unchanged from approximately $5.122 billion at year-end.

Owens Corning returned $264 million to shareholders during the quarter, consisting of $200 million of share repurchases and $64 million of dividends. The company repurchased 1.7 million shares and had 10.8 million shares remaining under its existing repurchase authorizations.

Continuing operations and full-company results diverged

Owens Corning completed the sale of its glass reinforcements business on April 30, making the distinction between continuing and discontinued operations important. Continuing operations generated $310 million of net earnings attributable to OC, but total net earnings attributable to OC were $226 million because discontinued operations produced an $84 million after-tax loss. A year earlier, discontinued operations contributed $29 million of earnings, and total net earnings attributable to OC were $363 million.

Earnings guidance

Owens Corning expects Q3 revenue of $2.6 billion to $2.7 billion, slightly below the prior year, with an adjusted EBITDA margin of 20% to 22%. Both ranges are below the Q2 actual levels of $2.756 billion and 24%, respectively.

Management expects discretionary remodeling and residential new construction to remain under pressure. Heavier distributor inventory stocking during Q2 is also expected to reduce Q3 Roofing purchases. The company assumes storm demand will be consistent with historical averages, North American non-residential construction will remain stable, and core European markets will gradually improve.

The anticipated $40 million of incremental Q3 costs creates an additional margin headwind at the same time that residential demand and distributor purchases are expected to remain pressured.

Recent insider transactions

The supplied six-month insider summary shows 168,162 shares classified as purchases across 42 transactions and 2,626 shares sold across two transactions, resulting in net purchases of 165,536 shares. However, the latest transaction list is dominated by stock awards, which should be distinguished from open-market purchases.

The transaction values shown are reported dollar amounts, not share quantities. The two listed sales should not be interpreted together with compensation-related awards as a single directional signal about management’s outlook.

Risks investors need to watch

• Residential demand pressure: Continued weakness in discretionary remodeling and new residential construction could limit sales growth, particularly in businesses exposed to repair and new-build activity.
• Distributor purchasing patterns: Heavy Roofing inventory stocking in Q2 is expected to reduce distributor purchases in Q3, creating a near-term revenue headwind even if end-market demand does not deteriorate further.
• Cost inflation: Approximately $40 million of incremental Q3 costs associated with inflationary effects from the Iran conflict could pressure an adjusted EBITDA margin already expected to decline sequentially.
• Broad segment margin contraction: EBITDA margins fell in Roofing, Insulation, and Doors during Q2. Sustained cost pressure or weaker volume could make margin recovery more difficult.
• Execution of cost initiatives: The additional $75 million of planned structural cost improvements remains important to supporting earnings as market conditions stay pressured.

Summary

Owens Corning’s Q2 2026 sales were nearly unchanged, but higher cost of sales and weaker segment profitability reduced gross margin, adjusted EBITDA, and continuing-operations earnings. Improved operating cash flow and achieved cost synergies provided some support, while the glass reinforcements divestiture widened the difference between continuing and total-company results. The main issues for the next quarter are distributor purchasing after Q2 inventory stocking, residential demand, the expected $40 million cost headwind, and whether further structural savings can help stabilize margins.