TPO & PVC Membrane Roofing
Waterproof, walkable low-slope systems in TPO, PVC, and modified bitumen.
Overview
Flat and low-slope roofs need a completely different approach than pitched roofs. Water doesn't run off — it sits. That means every seam, penetration, and edge has to be fully waterproofed rather than just shingled over.
We install heat-welded TPO and PVC membrane systems, plus traditional multi-ply modified bitumen, all engineered specifically for low-slope applications. Done correctly, these roofs last decades and stay leak-free through Pacific Northwest winters.
- Free estimate emailed after inspection
- Premium, warrantied materials
- Licensed & insured crew
- Full jobsite cleanup included
Why homeowners choose it
Fully waterproof
Heat-welded seams create a continuous membrane with no mechanical joints for water to find.
Walkable & serviceable
You can safely walk the roof to service HVAC, skylights, or solar without damaging the surface.
Cool roof options
White and light-colored TPO and PVC membranes reflect sunlight, keeping the space below cooler and reducing summer cooling costs.
Great for additions
Modern flat-roofed additions, dormers, and covered porches all rely on membrane systems.
Long lifespan
Properly installed multi-layer systems commonly last 25–30+ years.
Compatible with solar & greenroof
Membrane roofs are the standard substrate for rooftop solar and vegetated systems.
Material specifications
The performance specs we target for every tpo & pvc membrane roofing installation.
TPO & PVC membrane system
Heat-welded single-ply TPO or PVC membrane engineered for low-slope roofs and modern flat additions.
- Heat-welded seams stronger than the membrane itself
- TPO and PVC options available, both 60-mil with optional 80-mil upgrade
- Reflective membranes reduce summer heat gain
- Fully compatible with rooftop solar and mechanical curbs
- Mechanically fastened or fully adhered per assembly design
- Membrane
- TPO or PVC thermoplastic
- Thickness
- 60-mil standard, optional 80-mil upgrade
- Seams
- Heat-welded
- Fire rating
- UL 790 Class A assemblies
- Wind rating
- High-wind rated assemblies
- Warranty
- Up to 30 years
- Lifespan
- 25–30+ years
What's included
Specific materials and details included with this system.
TPO & PVC membrane
60-mil single-ply thermoplastic membrane (TPO or PVC) with optional upgrade to 80-mil, mechanically fastened or fully adhered, with heat-welded seams.
Modified bitumen (mod-bit)
Multi-ply torch-down or self-adhered system — the traditional workhorse for residential flat roofs.
Cover board & insulation
Rigid insulation and a high-density cover board give the membrane a stable, walkable substrate.
Custom flashings & drains
Pre-formed corners, pipe boots, and drain bowls welded directly into the membrane.
Our process
- 01
1. Slope & drainage review
We check that your roof drains where it should. Ponding water is the #1 killer of flat roofs and often needs to be addressed before re-roofing.
- 02
2. Tear-off or overlay assessment
We evaluate whether the existing roof needs to come off or can be overlaid per code and manufacturer spec.
- 03
3. Deck & insulation
Replace bad decking, install insulation to target R-value, and mechanically fasten or adhere the cover board.
- 04
4. Membrane installation
Membrane rolled out, fastened per spec, with all seams heat-welded and probe-tested.
- 05
5. Flashings & terminations
Every pipe, curb, drain, and edge detailed with manufacturer-spec accessories.
- 06
6. Final inspection
Water test where applicable, and a walk-through with photos of every critical detail.
Warranty
Manufacturer material warranties up to 30 years available on qualifying TPO and PVC systems, plus our workmanship warranty. Specific coverage depends on membrane type, thickness, and install method — spelled out in your proposal.
Best fit for
- Flat and low-slope residential roofs
- Modern architecture with parapet walls
- Additions, dormers, and covered porches
- Homes with rooftop decks, HVAC platforms, or solar
Frequently asked
+How long does a TPO or PVC roof last?
A quality TPO or PVC system installed correctly typically lasts 25–30+ years. Both are heat-welded single-ply membranes with excellent performance. Cheap membranes or sloppy seam welds fail much earlier — the material and the crew both matter.
+My flat roof ponds water. Is that a problem?
Ponding can happen on aging flat roofs or because of the original slope configuration. Slope usually can't be changed without structural work, so it isn't always a problem we can fully eliminate. We inspect every low-slope roof and do everything possible to improve drainage, prevent standing water, and install a membrane system that performs for the long term.
+Can I put solar on a membrane roof?
Yes — membrane roofs are the preferred substrate for rooftop solar because penetrations can be fully welded and warrantied.
Included in TPO & PVC Membrane Roofing
Everything covered in your tpo & pvc membrane roofing project — no surprises, no hidden line items.
Ready to talk about your tpo & pvc membrane roofing?
Free, no-pressure written inspection. Local Lynnwood, WA crew serving King & Snohomish County.