Install Flat, Foam, or Single Ply Roofing Cost in Washington in 2026
Most Install Flat, Foam, or Single Ply Roofing projects in Washington cost between $12,500 and $39,000. The typical price is $21,000.
Labour and materials in Washington run about 13% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Architectural asphalt versus metal, tile or slate
- Roof pitch and number of stories
- Tear-off of one or more existing layers
- Decking replacement found once the old roof is off
Usually included
- Tear-off and disposal
- Underlayment, drip edge and flashing
- Shingles and ridge vent
- Manufacturer material warranty
Usually extra
- Deck replacement beyond a few sheets
- Gutters
- Structural repair
Unit prices in Washington
| Quality tier | Cost per square |
|---|---|
| Budget | $565 |
| Mid-range | $945 |
| High-end | $1,750 |