78 mph measured gust 1 mi E of Woodacre
The PG&E station on Gunsight Fire Road reported a gust of 90 mph.
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TPO is a heat-welded single-ply membrane common on commercial and low-slope roofs. It is white and reflective, and seam quality is what mostly decides its lifespan.
For Marin County, NOAA lists 0 hail reports, 2 damaging-wind reports (up to 78 mph) and 0 tornado reports from January 2024 to June 2026. These count reports, not damaged roofs.
The PG&E station on Gunsight Fire Road reported a gust of 90 mph.
A tornado warning for San Francisco and San Mateo Counties was issued at 5:51 AM after a rotating thunderstorm was observed off the coast of San Francisco. This is the first tornado warning issued on record for the city of San...
A trained spotter reported ping pong sized hail 1.5 inches in diameter in Rio Vista with severe thunderstorms.
Source: NOAA NCEI Storm Events Database, data through Jun 30, 2026. All storm reports for Lucas Valley-Marinwood
| Job | Typical US range |
|---|---|
| Flat roof (TPO / EPDM), average home | $5,000 – $12,000 |
National planning ranges for an average ~2,000 sq ft home, not quotes. Local labor, roof pitch, layers to remove, materials and permits change the price.
A thermoplastic polyolefin single-ply membrane whose seams are heat-welded; common on flat commercial roofs.
Both work. TPO is heat-welded and reflective; EPDM is a rubber membrane with glued or taped seams. Installer experience matters more than the name.
Many cities and counties require a building permit for roof work; the roofing company normally pulls it. Ask who is responsible and request a copy. Check with the Marin County building department for local rules.
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