A town that grew five-fold in the 1980s
Spray Foam Insulation in Windsor, CA
Mostly newer, mostly owner-occupied, often with vaulted ceilings.
- Free on-site estimates
- Itemized written quote: material, thickness or depth, and R-value per area
- Air leaks, wiring and moisture checked before anything gets covered
Newer Homes, Hotter Summers
Spray Foam Insulation in Windsor mostly means houses built from the 1980s on. Wikipedia notes that the Windsor area grew five-fold in the 1980s as development spread north of Santa Rosa along Highway 101, and it incorporated as a town on July 1, 1992. That makes Windsor's housing younger than most of Sonoma County's.
What 1980s and 1990s homes need
Houses from that era usually have attic insulation, but often less than today's targets and settled over 30 or 40 years. Vaulted ceilings were popular, and those rafters hold limited insulation. Can lights, bath fans and duct boots leak air. Our usual plan: seal, top up the attic toward R-49, and use closed-cell foam where a vaulted ceiling is opened during a reroof or remodel.
Owners who stay
At the 2020 census, 76.3% of Windsor's occupied homes were owner-occupied, out of 9,672 housing units. Owners planning to stay often take on the larger upgrades, like whole-attic sealing or wall insulation during re-siding.
Fire seasons
The 2019 Kincade Fire forced evacuations in Windsor, along with Healdsburg, Geyserville and Santa Rosa. If your attic smells of smoke from that season or later ones, we can check the insulation.
Heat
Northern Sonoma County runs warmer than the south county. Attic sealing does a lot here.
Free weatherization
Sonoma Clean Power lists Green House Calls, free weatherization for Windsor residents, among other programs.
Town Green and newer subdivisions
Downtown Windsor's mixed-use village around the former train station was built from the 1990s on with New Urbanist design, while much of the surrounding housing dates from the 1980s boom. The newer homes typically need only sealing and a top-up; the 1980s homes may need more attic depth and attention to vaulted ceilings.
Rooms over garages
Two-story Windsor homes often have bedrooms over the garage, and those rooms are frequently the hottest in summer and coldest in winter. Insulating the garage ceiling, the floor of the room above, and sealing between them is one of the most common comfort fixes we do here.
Ask for a visit. Get a free estimate
What to Know in Windsor
- 1980s growth. The Windsor area grew five-fold in the 1980s, and Windsor incorporated as a town on July 1, 1992.
- Housing. The 2020 census counted 9,672 housing units; 76.3% of occupied units were owner-occupied.
- Kincade Fire. The 2019 Kincade Fire burned 77,758 acres, destroyed 374 structures and prompted evacuations in Windsor, Healdsburg, Geyserville and Santa Rosa.
- 1905 fire. On May 21, 1905, a wind-driven fire destroyed the center of Windsor; the 1906 earthquake damaged buildings still being rebuilt.

Windsor Questions
My Windsor house is from the 1990s. Does it need insulation?
It likely has some, but it may be settled and below current targets. Sealing and a top-up usually help.
Can you insulate vaulted ceilings?
From outside during a reroof, or from inside during a remodel, with closed-cell foam where depth is short.
Is free weatherization available in Windsor?
Sonoma Clean Power lists Green House Calls for Windsor residents. Check eligibility.
Why is the bedroom over my garage so hot?
The floor over the garage and the knee walls around it are often poorly insulated and leaky. Sealing and insulating those surfaces usually helps a lot.
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