Spray Foam Insulation in Petaluma, CA

Spray Foam Insulation in Petaluma has two jobs: keeping older houses comfortable through chilly fog mornings, and keeping newer homes cool on hot afternoons. Wikipedia describes Petaluma's summer mornings as often foggy and chilly, with the fog clearing around midday to warm, clear skies. August averages about 82°F by day and 53°F at night; December averages 57°F and 39°F, with frost on clear nights.

A historic stock

Petaluma came through the April 1906 earthquake relatively unharmed thanks to stable bedrock beneath it, so much of its older building stock survived; the downtown Historic Commercial District is on the National Register. Many older houses near downtown have little insulation in the walls or under the floors.

Floors and the river

A significant part of the city lies in the Petaluma River's flood plain, which overflows every few years, especially in the Payran neighborhood. In low-lying homes we check crawl spaces carefully for moisture before insulating, and lean toward closed-cell foam or a vapor barrier plus batts where the space stays damp.

Hot days too

Petaluma recorded 111°F on September 6, 2020. Attic sealing and blown-in are what keep upstairs rooms tolerable on days like that.

Typical plan

For an older house: seal and top up the attic, insulate under the floor to R-19, and dense-pack the walls. For a newer house: seal can lights and top plates and add attic depth.

West side and east side

The neighborhoods around Petaluma's historic downtown hold much of its older housing, while many areas farther out, including east of Highway 101, are later subdivisions. The older side tends to need floors and walls; the newer side tends to need attic sealing and depth.

Penngrove and Lakeville

We also work in the unincorporated communities around Petaluma, including Penngrove to the north and Lakeville to the south, where farmhouses and rural homes often have little insulation and outbuildings that owners want to convert.

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