Flat and Low-Slope Roofing Referrals in Reno

Low-slope and TPO roofs need different details than a steep shingle roof. Reno Nevada Roofs refers homeowners to licensed contractors for flat-roof repair or replacement. We do not install membranes.

Where flat roofs show up on Reno homes

Garages, additions, porches, and some modern or mid-century forms. Many “house” jobs are really two systems — a steep field and a low-slope wing — that should both be in the inspection.

Why drainage and flashings fail

Ponding, clogged drains or scuppers, and wall flashings are typical leak sources. High-desert sun also ages exposed membranes and sealants.

TPO and other membranes

TPO is one common single-ply option; others exist. This page stays at a plain-language level: the licensed contractor should specify the membrane, insulation, attachment, and edge details for the building, not a website.

Commercial vs. residential scope

We focus on residential and small residential-adjacent low-slope work unless that later changes. A large commercial roof is a different project.

Why low-slope roofs fail differently

Shingles and tile rely on slope: water runs downhill over overlapping pieces. A low-slope roof cannot rely on that, so it depends on a continuous membrane, sealed seams, and drainage that actually works. When water sits on a flat section (ponding), it finds seams and penetrations, and the sun bakes whatever debris collects there. On Reno homes, the trouble spots are usually where a flat section meets a wall or a sloped roof, around HVAC curbs and vents, and at scuppers or drains that clog with leaves and dust.

Common membrane types in plain language

• TPO: a single-ply sheet, usually light-colored, with seams welded by hot air.
• PVC: another single-ply sheet with welded seams.
• EPDM: a rubber membrane, often dark, with seams joined by tape or adhesive.
• Modified bitumen: asphalt-based rolls, torched, self-adhered, or cold-applied.
• Coatings: liquid-applied coatings over an existing roof. Ask what the existing roof is, whether it is sound enough to coat, and what the coating’s warranty covers.

Each has manufacturer installation rules. Ask the contractor which system they are bidding, whether they are approved by that manufacturer, and what the warranty covers.

Questions to ask about drainage

• Where does water go when it leaves this section, and is that path clear?
• Is there ponding now, and will tapered insulation or crickets fix it?
• How will the new membrane tie into the wall and the sloped roof?
• Will curbs and penetrations be re-flashed?

Fire rating, permits, and licensing

A low-slope section is part of the roof for code purposes. On IR 1 and IR 2 parcels, Washoe County requires Class A roof assemblies (WUI Code Guide); confirm the membrane assembly’s rating. A replacement usually needs a permit, which the residential contractor obtains (NRS 624.970). Check the license in the NSCB search and confirm the classification covers roofing.

Residential first

This site focuses on homes: garages, additions, patio covers, and mixed-slope houses. If you manage a commercial building, say so on the form; we will tell you if we cannot match the job. For a whole-house decision, see roof replacement and the repair vs. replace guide.

Snow and ice on low-slope sections

Snow sits longer on a low-slope roof than on a steep one, and melting snow needs a clear path to drains or scuppers. If water refreezes at a blocked outlet, it can back up under flashings. Keep drains clear before winter, and ask the contractor how the design handles snow load and meltwater at your elevation (see Washoe’s design requirements).

Repairs vs. replacement

A single seam failure or a damaged area around a penetration can often be repaired. Widespread blistering, saturated insulation under the membrane, or repeated leaks in several places point to replacement. Ask for photos and, if the contractor suspects wet insulation, how they know.

Walking on low-slope roofs

Low-slope roofs look safe to walk, but membranes can be punctured by tools, and edges have no railing. Keep foot traffic to what is necessary and let the contractor handle access.

Frequently asked questions