Spray Foam Insulation in San Leandro, CA

Spray Foam Insulation in San Leandro mostly involves houses from its post-war boom. The city's population rose from 27,542 in 1950 to 65,962 in 1960, a 139.5% increase. The 2020 census counted 32,898 housing units, with 54.5% of occupied units owner-occupied. Many of those 1950s houses still have their original thin insulation.

What 1950s houses need

Attics with a few inches of old insulation, walls with thin batts or none, and floors or slabs with little insulation. Attic sealing and depth come first; walls and floors next.

Heritage

Portuguese settlers arrived from the 1880s, and by 1910 they made up nearly two-thirds of San Leandro's population. Older houses from those decades remain in some neighborhoods and need the extra care older construction requires.

Fault

The Hayward Fault runs through San Leandro; its largest recorded quake, in 1868, destroyed the Alameda County courthouse then in the city. Owners planning seismic retrofits should insulate floors after bolting and bracing.

Ground near the bay

Groundwater flows west toward San Francisco Bay. Houses on low ground should have dry crawl spaces before floor insulation.

Zone

OpenEI lists Alameda County in climate zone 3C. ENERGY STAR recommends adding R-38 over three to four inches of existing attic insulation in zone 3.

Garages and additions

Many San Leandro houses have attached garages, and some have been converted or added onto. A bedroom next to an uninsulated garage wall, or an addition insulated to a different standard, is often the coldest room in the house. We check those walls and ceilings on the same visit and price each fix on its own line.

We visit and quote each area in writing. Get a free estimate