TA
Tony Aon BBB
· 29 days ago
I needed a roof repair very quickly because rain was coming in. I reached out and they replied almost immediately. He came out, conducted an inspection that afternoon and by the end of the week it was handled.
Flat Roof & Low-Slope Roofing in Tacoma & Pierce County
DHT Construction & Roofing is a family-owned, licensed roofing contractor (WA #DHTCOCR781PL) providing flat & low-slope roofing in Tacoma, WA since 2013, rated 5.0 on Google. Get a free instant quote online or call (253) 363-1948.
DHT Construction & Roofing repairs and replaces flat and low-slope roofs on homes across Tacoma, Pierce County and South King County. Whether it's a flat section over an addition, a low-slope porch or garage, or a whole low-pitch roof, we cover it with a membrane system built for Pacific Northwest rain — so the whole roof is handled by one crew and one warranty.
Free inspection · No pressure · Licensed, bonded & insured · 5.0 ★ on Google
DHT Construction & Roofing repairs and replaces flat and low-slope roofs on homes across Tacoma, Pierce County and South King County. Whether it's a flat section over an addition, a low-slope porch or garage, or a whole low-pitch roof, we cover it with a membrane system built for Pacific Northwest rain — so the whole roof is handled by one crew and one warranty.
5.0 · 175 Google reviews · Licensed, bonded & insured
Who handles flat and low-slope roofing in Tacoma?
Why do flat roofs leak in Pacific Northwest rain?
A flat or low-slope roof doesn't shed water as fast as a steep roof, so our long wet season gives water more time to find a weak spot. Ponding water — puddles that sit for days after a storm — puts constant pressure on seams and flashing, and fir needles and moss clog drains and scuppers so water backs up even further. Most flat roof leaks we see around Tacoma start at seams, wall flashing, vents and drains rather than in the middle of the membrane.
Should I repair or replace my flat roof?
If the leak is in one spot — a failed seam, a lifted flashing edge or a cracked vent boot — and the rest of the membrane is sound, a repair usually makes sense. If you see widespread blistering, cracking, soft decking, or ponding across large areas, or the roof has been patched again and again, replacement is usually the better investment. We'll show you photos from your free inspection and tell you honestly which way we'd go.
Can you put shingles on a low-slope roof?
Asphalt shingles need enough pitch to shed water, so very low-slope sections need a membrane instead. On homes where most of the roof is steep enough for shingles but a porch, dormer or addition is nearly flat, we install shingles on the pitched areas and a membrane on the low-slope sections, tied together with proper flashing so the transitions stay watertight.
Where do we install flat and low-slope roofs?
We work on flat roofs in Tacoma and throughout the South Sound — flat roofing in University Place and Gig Harbor, Puyallup flat roofing on South Hill and in the valley, flat roofing in Federal Way and Federal Way low slope roof repairs, and homes in Sumner and the surrounding Pierce and South King County cities listed below.
How much does a flat roof cost?
Flat and low-slope roof pricing depends on the size, the condition of the decking underneath, drainage and how the low-slope area ties into the rest of the roof. Start with our free instant quote, which measures your roof by satellite, and a free inspection confirms the exact price in writing. You can also see our roof replacement cost guide for how roof size affects price.
What's included in our flat & low-slope roofing
- Free inspection of the membrane, seams, flashing and drains
- Leak repair at seams, flashing, vents and penetrations
- Full tear-off and decking repair on replacements
- Membrane system for flat and low-slope sections
- Flashing transitions where low-slope meets shingle or metal roofing
- 10-year workmanship warranty
Signs you need flat & low-slope roofing
- Water stays ponded on the roof for days after rain
- Ceiling stains under a flat section, porch or addition
- Blisters, cracks or seams pulling apart
- Clogged drains or moss collecting on the roof
- Soft or spongy spots when walking the roof
Materials
We handle low-slope and flat sections with membrane systems, and tie them into asphalt shingle or metal roofing on the rest of the home so the whole roof is covered by one crew and one warranty.
Built for Pacific NW weather
Pacific Northwest rain is hard on flat roofs because water sits longer. Good drainage, sealed seams and properly flashed walls and penetrations are what keep a low-slope roof dry through a Tacoma winter.
Typical timeline
Most flat roof repairs are done in a single visit. Replacing a flat or low-slope section typically takes 1–3 days depending on size and decking condition.
Recent flat & low-slope roofing projects
The proof of happy customers
Learn what other homeowners like you experienced when working with us.
TA
Tony A29 days ago
on BBB
I needed a roof repair very quickly because rain was coming in. I reached out and they replied almost immediately. He came out, conducted an inspection that afternoon and by the end of the week it was handled.
What our customers say
Verified reviews5.0
Based on 175 Google reviews.
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BBB Accredited · A+ RatingLicensed · Bonded · Insured in Washington
SR
Scott Reitzon Google
· a month ago
Excellent work. Worked non stop each day to complete the job in a few days. Did a lot of repairs along the way to make sure it was going to last. Highly Recommend.
GG
Grant Gon BBB
· Mar 14, 2026
The house I rent needed a new roof. The owners live out of state, so I volunteered to find a good contractor. By word of mouth, I found DHT and we could not be happier with the result.
MJ
Matt Janzowon Google
· a month ago
Fast, clean and professional from the first call to the final walkthrough. The crew treated our property like it was their own.
DL
Deborah Lon BBB
· Feb 2, 2026
Professional, on time, and the pricing was exactly what they quoted. They cleaned up so well you'd never know a crew had been here. A+ all the way.
SM
Sarah M.on Google
· 2 months ago
Curtis and his team replaced our whole roof in 3 days. Clean job site, fair price, and the new shingles look incredible.
Flat & Low-Slope Roofing FAQ
Do you repair flat roofs in Tacoma?
Yes. We repair leaks at seams, flashing, vents and drains on flat and low-slope roofs across Tacoma, Pierce County and South King County.
Do you do flat roofing in Puyallup, University Place and Federal Way?
Yes — those are all part of our regular service area, along with Sumner, Gig Harbor and the other cities listed on this page.
What causes ponding water on a flat roof?
Usually clogged drains, sagging decking or a roof that was built without enough slope toward drains. Our inspection finds the cause so it can be fixed, not just patched.
Can low-slope roofs use shingles?
Only if the pitch is steep enough for shingles to shed water. Very low-slope areas need a membrane, which we tie into the shingle roof with proper flashing.
How do I get a flat roof price?
Use our free instant quote online or call (253) 363-1948. A free inspection confirms your exact price.
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Flat & Low-Slope Roofing across Pierce & South King County
Areas we serve
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