Owens Corning called its second quarter “strong results.” Adjusted EBITDA fell 6%, adjusted EPS fell 7%, and six-month adjusted EBITDA is down 19%. The number contractors should care about isn’t in the quarter at all. It’s in the guidance.
The company told investors on August 5 that it “anticipates inflationary impact from the Iran conflict to result in incremental costs of approximately $40 million in the third quarter,” on top of roughly $30 million absorbed in the second. Third-quarter guidance puts revenue at $2.6 to $2.7 billion with adjusted EBITDA margin of 20 to 22%, down from 24%.
Why This Company’s Cost Commentary Matters More Than It Used To
Owens Corning spent two years reshaping itself. It bought Masonite to enter doors, then sold its century-old glass reinforcements business on April 30, 2026 for $370 million in net cash proceeds. What’s left is a residential-focused building products company concentrated in exactly the two categories contractors buy in volume: shingles and insulation.
Roofing held up in the quarter at $1.313 billion of sales and a 34% EBITDA margin. Insulation grew 4% to $971 million, though margin slipped from 24% to 22%. Doors dropped 7% to $513 million with margin falling from 14% to 11%, which is an uncomfortable trajectory for a business acquired at a premium.
Per-share results were also flattered by buybacks. Diluted share count fell from 85.5 million to 80.6 million, roughly 6% fewer shares absorbing the earnings, after the company repurchased 1.7 million shares for $200 million and paid $64 million in dividends.
The Channel Signal Is the One to Watch
Buried in the outlook: “heavier second-quarter inventory stocking is expected to impact third-quarter distributor purchases.” Translated, distributors pre-bought ahead of price increases and sell-through was weaker than sell-in.
That combination has a specific consequence at the jobsite. Availability of particular SKUs and colors can tighten regionally even while the broader market looks soft, because distributors work down what they already have rather than reorder. Roofers pricing fall work should confirm stock, not assume it.
The pricing direction is not ambiguous. A manufacturer telling investors it faces another $40 million of input inflation and guiding its own margin down 200 to 400 basis points is not a manufacturer preparing to discount. Historically that sequence precedes list-price letters. Estimators pricing 2027 residential and light-commercial work should treat current shingle and insulation allowances as a floor. On tax-credit deals with fixed capital stacks, like the $98 million Addison Park senior community in Maryland, there is nowhere for that escalation to go.
Doors may be the exception. A segment shrinking 7% a quarter at 11% margins, with network optimization underway, is a segment where a buyer has leverage.