Spray Foam Insulation in Castro Valley, CA

Spray Foam Insulation in Castro Valley covers an unincorporated community that grew fast after World War II. Population rose from 4,145 in 1940 to 37,120 in 1960 as chicken ranches gave way to commuter suburbs. Joseph Eichler built around 200 homes in the Greenridge development in the early to mid-1960s, most with atriums and concrete slab floors with radiant heating.

Eichler roofs

Eichler houses have flat or low-slope roofs with exposed beams and little or no attic. The usual way to add insulation is from above during a reroof, with rigid foam or spray foam on the roof deck. We work with your roofer on timing.

Post-war ranches

Ranches and tract homes from the 1950s and 1960s need attic sealing and depth, and often wall fill. Those are quick, cost-effective jobs.

Creeks and hills

Ten creeks rise in the eastern hills and flow into San Lorenzo Creek. Hillside homes get warmer afternoons and benefit from attic sealing; homes near creeks should have dry crawl spaces before floor work.

Owners who stay

In 2020 Castro Valley had 23,941 housing units, 67.2% owner-occupied. Owners planning to stay often phase work over a few years; our itemized quotes support that.

Zone

OpenEI lists Alameda County in climate zone 3C. ENERGY STAR recommends R-49 for an uninsulated zone 3 attic.

Before a heat pump

If you plan to replace a furnace or add a heat pump, do insulation and air sealing first when you can. A tighter house may need smaller equipment, and the HVAC contractor can size it to the improved house.

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