Ponding is the enemy
A membrane that holds a puddle will tell on you. We look at drains, crickets and the structure. If the bay does not slope, we talk about tapered insulation before we talk about color.
ROOFING · LOW-SLOPE
Flat and Low-Slope Roofing (TPO)
A lot of Eastside “flat” roofs are really low-slope additions, carports and mid-century wings. Shingles fail there because the water does not leave. We install TPO membrane systems — fully detailed at the edges, drains and walls — and we pair them with the sloped shingle or metal roof on the rest of the house so you are not hiring two roofers to argue about the joint.
Included in this scope
- TPO membrane sized for the slope, sun and foot traffic you actually have
- Cover board or a dry, solid substrate — wet insulation gets replaced
- Welded seams, flashed curbs, drains and scuppers
- Edge metal that does not dump water into the fascia
- A tie-in to the shingle or metal roof next to it
Details that change the result
Skylights and HVAC curbs
Most low-slope leaks we repair are at a curb, not in the field. Those get new flashings with the membrane, not a tube of sealant.
Commercial roofs live nearby
Multi-family and light commercial low-slope work is scoped on the commercial roofing page, with tenant timing called out.
Where this fits
Related pages
Most projects touch more than one trade. These are the pages homeowners open next, and the scopes we most often bundle into a single estimate.
Questions
Before you call
TPO or torch-down?
For the houses we do, TPO is the default: welded seams, no open flame against cedar siding. If a detail truly wants a different membrane, we will say why.
Can I walk on it?
Occasionally, yes. A roof deck you furnish is a different assembly. Tell us if the “flat roof” is actually a terrace.
How long does a low-slope replacement take?
A single bay is often a day. A house with several low-slope wings, tied into a steep roof, is scheduled with the shingle crew so the joint is never left open overnight.
Ready when you are
Get a written estimate this week
Call (425) 555-0123, or send the form and we will schedule the visit. We reply within one business day.