Flat Roofs That Don't Hold Grudges — or Water
Low-slope sections fail from ponding and bad seams, not age. We install membrane systems engineered to drain, seam-tested before we leave.
- ✓ Free inspection & photo report
- ✓ Fixed, line-item bids
- ✓ 15-year written warranty
- ★ 4.9 · 80+ Google reviews
- 500+ projects completed
- Licensed & bonded in WA + OR
- 15-year written warranty
Is this you?
Ponding after every rain
Water sitting 48+ hours is actively shortening the membrane's life. Drainage is fixable.
Blisters, bubbles, or open seams
The membrane is telling you where it's going to fail. Early re-seaming is cheap; saturated insulation isn't.
Addition or garage with a tired roll roof
1990s torch-down is on borrowed time. Modern TPO outperforms it on every axis.
Small commercial building
We handle low-slope on shops, offices, and multifamily up to mid-size.
Membranes matched to the roof, not the truck stock
TPO for most residential low-slope: heat-welded seams stronger than the sheet itself. PVC where kitchen exhaust or chemicals hit the roof. Modified bitumen where foot traffic or budget calls for it. Tapered insulation to kill ponding at the source, and walk pads anywhere HVAC techs will tread.
How we do it
- 1
Core sample & moisture scan
We find out what's wet underneath before quoting — recover vs. tear-off is a moisture decision, not a sales one.
- 2
Drainage plan
Tapered layout, scuppers, or drains — every fix designed so water leaves the roof.
- 3
Install & seam test
Heat-welded, probe-tested seams. The test happens before the crew leaves, not after the first storm.
Low-slope pricing
Residential low-slope sections typically run $8,000–$20,000 depending on area, insulation condition, and drainage work. Saturated insulation discovered on tear-off is the main variable — our core samples up front keep that surprise rare.
Flat & Low-Slope Roofing: straight answers
TPO, PVC, or torch-down — what's the difference?
TPO and PVC are single-ply membranes with welded seams; PVC resists grease and chemicals better. Torch-down (modified bitumen) is the older multi-layer approach — still valid for some roofs, but welded single-ply wins on seam integrity, which is where flat roofs fail.
Can a flat roof really be leak-free in PNW rain?
Yes — flat roofs fail from ponding and seam workmanship, not rainfall totals. Engineered drainage plus tested seams handles Northwest volume fine. Seattle's commercial district is proof, block after block.
My flat roof leaks but is only 10 years old. Replace it?
Maybe not. If the insulation is dry, a targeted seam repair or recover board plus new membrane can reuse the assembly. The moisture scan tells us; we don't guess with your money.
Where we do this work
- Airway Heights, WA
- Albany, OR
- Anacortes, WA
- Arlington, WA
- Ballard, WA
- Bellevue, WA
- Bellingham, WA
- Bothell, WA
- Browne's Addition, WA
- Burlington, WA
- Camano Island, WA
- Capitol Hill, WA
- Chattaroy, WA
- Cheney, WA
- Coburg, OR
- Coeur d'Alene, ID
- Colbert, WA
- Columbia City, WA
- Corvallis, OR
- Cottage Grove, OR
- Creswell, OR
- Dallas, OR
- Deer Park, WA
- Duvall, WA
- Edmonds, WA
- Eugene, OR
- Everett, WA
- Fairfield, WA
- Ferndale, WA
- Fremont, WA
- Granite Falls, WA
- Green Lake, WA
- Greenacres, WA
- Greenwood, WA
- Hayden, ID
- Hillyard, WA
- Independence, OR
- Issaquah, WA
- Junction City, OR
- Keizer, OR
- Kendall Yards, WA
- Kenmore, WA
- Kirkland, WA
- Lake City, WA
- Lake Stevens, WA
- Lebanon, OR
- Liberty Lake, WA
- Lynden, WA
- Lynnwood, WA
- Madrona, WA
- Magnolia, WA
- Marysville, WA
- Mead, WA
- Meadowdale, WA
- Medical Lake, WA
- Mill Creek, WA
- Millwood, WA
- Monroe, WA
- Montlake, WA
- Mount Vernon, WA
- Mountlake Terrace, WA
- Mukilteo, WA
- Newman Lake, WA
- Nine Mile Falls, WA
- North Bend, WA
- North Everett, WA
- Northgate, WA
- Oakridge, OR
- Otis Orchards, WA
- Philomath, OR
- Pleasant Hill, OR
- Post Falls, ID
- Pullman, WA
- Queen Anne, WA
- Rathdrum, ID
- Ravenna, WA
- Redmond, WA
- Rockford, WA
- Salem, OR
- Sammamish, WA
- Sedro-Woolley, WA
- Shoreline, WA
- Silver Lake, WA
- Silverton, OR
- Skagit County, WA
- Snohomish, WA
- South Hill, WA
- Spokane, WA
- Spokane Valley, WA
- Springfield, OR
- Stanwood, WA
- Stayton, OR
- Sweet Home, OR
- Valleyford, WA
- Veneta, OR
- Veradale, WA
- Wallingford, WA
- Wedgwood, WA
- Whatcom County, WA
- Woodburn, OR
- Woodinville, WA
Get the flat & low-slope roofing conversation started.
Free 20-minute inspection. Photo report you keep either way. Zero pressure.