Spray Foam Insulation in Lafayette, CA

Spray Foam Insulation in Lafayette focuses on summer heat more than in the bayside cities. Lafayette sits at about 320 feet, separated from Oakland and Berkeley by the Berkeley Hills, and its record high is 115 degrees (July 1972), with a record low of 19 (December 1990). Average annual precipitation is 19.58 inches.

Attic heat

On hot afternoons, attic temperatures climb and push heat into upstairs rooms. Sealing the attic floor and adding depth is the first fix; where ducts and equipment sit in the attic, foam on the roof deck can bring them inside the insulated space.

Bonus rooms and upper floors

Larger homes often have bonus rooms and upper floors that run hot. Closed-cell foam on kneewalls and slopes, and blocking open floor bays, usually solves it.

Cold nights

Winter nights get cold enough that floors over crawl spaces feel it. Floor insulation helps.

Owners

The 2020 census counted 25,391 residents and 9,999 housing units, 73.9% owner-occupied.

Zone

Lafayette is in Contra Costa County. ENERGY STAR's zone 3 guidance is R-49 for an empty attic and R-19 under floors.

Lafayette Reservoir

The EBMUD Lafayette Reservoir, completed in 1933, holds 1.4 billion gallons and is circled by a 2.7-mile paved trail. Briones Regional Park extends into the north of the city.

Before a new AC or heat pump

If you are replacing cooling equipment, insulate and seal first when you can. A tighter attic and ceiling may let the HVAC contractor size the new system smaller.

Garages and bonus space

Attached garages on hot days can push heat into rooms above or beside them. Closed-cell foam under a bonus room floor and in the shared wall keeps garage heat and fumes out.

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