TPO Membrane Roof Repair: Costs, Lifespan and Alternatives

We start at the flashings, check the deck from inside the attic, and photograph every elevation. On a Western Addition property we pay particular attention to dried-out underlayment and attic temperature.

We cover Western Addition across San Francisco County, including Japantown, Hayes Valley and San Francisco, and the rest of the service area listed on the site.

Granules in the gutters, curling tabs, repeat stains in the same ceiling after every storm, and soft spots underfoot. In Western Addition, asphalt dries out and sealant pulls back from penetrations years before the field wears through.

Two visits a year: clear valleys and gutters before the rains, then check flashings after the first real storm. In Western Addition that matters most because asphalt dries out and sealant pulls back from penetrations years before the field wears through.

Size, pitch, layer count and deck condition drive the number on any Western Addition roof. The line that moves is deck repair, so it belongs in the Western Addition quote at a rate per sheet rather than as an allowance.

A full replacement in Western Addition is permitted and inspected through the San Francisco Department of Building Inspection. Small repairs generally are not, but the layer count and assembly are checked on any permitted job.

Check the licence, liability cover and workers' compensation, then ask any Western Addition contractor what happens if the deck is worse than expected — and get that answer in writing before the covering comes off.

In inland conditions, composition shingle runs roughly fifteen to twenty-five years, tile underlayment twenty to twenty-five, and coatings seven to fifteen depending on the system.