Tariffs, Metal, and Fasteners: Why Your Q2 Bids Are Already Behind

July 27, 2026 · 4 min read · By the RoofTree Digest desk

Steel, aluminum, and copper tariffs are reshaping roofing costs faster than most bid sheets can keep up — here's what to reprice now.

The tariff math finally caught up with the trade

If your material costs feel like they're moving under your feet, they are. Section 232 tariffs on steel and aluminum have sat at 50% since mid-2025 and show no sign of rolling back. Copper's now at 50% too, with prices hitting a record $5.69/lb. And in case anyone was hoping this stayed contained to raw metal, Commerce expanded Section 232 coverage to more than 400 derivative product categories — meaning flashing, drip edge, fasteners, and prefab metal panels all get hit with the same 50% tariff as the raw material itself.

This isn't a one-line-item problem anymore. It's a whole-assembly problem.

Metal roofing takes the biggest hit

Standing seam and metal panel systems are absorbing the worst of it — roughly a 60% cost increase tied directly to steel and aluminum tariffs. The numbers back it up: aluminum mill shapes PPI jumped 33% year-over-year as of January 2026, and steel mill products rose 20.7% — the steepest climb since early 2022.

Translation for your estimating software: a standing seam steel job that priced at $10-$12/SF two years ago is now starting closer to $12-$15/SF. If you're still quoting off last year's unit costs, you're bidding yourself into a loss.

Other categories are moving too, just not as violently:

TPO/single-ply membranes: up 12-18%
Tile: up 8-15%
Asphalt shingles: up 6-10%, on top of another 4-8% from manufacturer hikes landing this spring

The April shingle hikes are stacking, not replacing

GAF, Owens Corning, CertainTeed, and Atlas all announced coordinated increases this spring — 4-8% across the board, effective between March 23 and April 15. These aren't isolated moves; they're layering on top of tariff-driven cost pressure that was already baked into distributor pricing. If you quoted a shingle job in February and it hasn't broken ground yet, go back and check your material cost assumption before you sign anything.

Here's the wrinkle worth watching closely: ARMA reported U.S. asphalt shingle shipments fell 9.9% year-over-year in Q1 2026. Manufacturers are raising prices into falling demand — a classic demand-destruction signal. That tells you two things. First, homeowners are deferring reroofs where they can. Second, manufacturers likely aren't done raising prices, because they're protecting margin on lower volume, not chasing market share.

Fasteners and chemicals: the quiet killers

Everybody's watching shingle and metal pricing. Fewer contractors are watching their fastener and adhesive lines closely enough, and that's a mistake. Screws, nails, bolts, and structural fasteners are up 30-50% year-over-year thanks to the same expanded Section 232 coverage.

Meanwhile, chemical inputs are getting hammered even harder in percentage terms:

MDI (the adhesive/sealant component used across roofing systems) faces 60% anti-dumping duties on Chinese imports
TCPP flame retardants are facing tariffs of 272.7%

Those numbers look absurd on paper, but they show up in real line items on your sealant, adhesive, and foam board invoices. If your supplier hasn't flagged these increases yet, they're coming.

Lumber: soft, but don't get comfortable

Framing lumber actually pulled back to $872.03/MBF in January 2026, down 3.44% from Q4 2025 — decent news if you're doing sheathing replacement or full deck tear-offs. But Q2 2026 saw a 5.11% spike, with prices up 4.21% year-over-year, marking nine straight quarters of year-over-year growth. That's not a market correcting — that's a market with a floor.

The Canadian softwood tariff, sitting at 14.54%, is that floor. Domestic mills have little incentive to sell below $400/MBF, and with the tariff stacked on top, realistic 2026 planning range is $440-$540/MBF. Don't budget lumber assuming January's dip is the new normal.

The bigger picture

Zoom out and the trend line is unambiguous: construction material prices are 43.4% higher than February 2020, and NAHB has building materials up 34% since December 2020. Construction input prices are still climbing month over month. Roofing isn't an outlier — it's riding the same wave as the rest of the trade, just with metal and fasteners as the sharpest edge right now.

Bottom line

Reprice metal jobs immediately. If your standing seam numbers don't reflect $12-15/SF baseline, you're leaving money on the table or walking into a loss.
Lock material costs at contract signing, not at bid time. The gap between quote and install date is where margin disappears right now.
Watch fastener and adhesive invoices line by line. These costs are rising faster than headline shingle percentages and are easy to miss.
Don't assume falling shingle demand means falling shingle prices. Manufacturers are protecting margin on lower volume — expect list prices to keep climbing even as shipments drop.
Lumber has a floor near $440/MBF. Budget accordingly on tear-off and resheathing scopes.

This is a margin-management year, not a volume-growth year. Price like it.