Best Spray Foam Insulation in Southern California

Spray foam is a quick-hardening insulation material applied with a spray gun. It creates airtight insulation, reduces energy consumption, and prevents moisture. There are open-cell and closed-cell types. It improves energy efficiency and indoor comfort.

Spray foam insulation provides superior air sealing and energy efficiency compared to traditional materials. It helps regulate indoor temperatures, reduces energy bills, and improves comfort year-round. It also strengthens structures and helps prevent moisture, dust, and allergens from entering your space.

Yes — spray foam insulation pays for itself over time through lower energy bills and reduced HVAC wear. It lasts longer and performs better than fiberglass or cellulose, making it one of the best long-term investments for energy savings and comfort in Southern California.

When installed correctly, spray foam insulation can last 30 to 50 years or more. It doesn’t sag, settle, or lose effectiveness like other insulation types. With proper installation and ventilation, it remains durable and efficient for decades.

Yes, spray foam insulation is completely safe once it’s fully cured. At 951 Construction, we use professional-grade materials and follow strict safety protocols during installation. We properly ventilate each job site to ensure a clean, healthy environment.

Open-cell foam is soft, flexible, and ideal for interior applications like walls and soundproofing. Closed-cell foam is denser, water-resistant, and provides higher R-values for better insulation and structural strength. Our team helps you choose the right option based on your project and budget.

Absolutely. Spray foam seals air leaks and prevents conditioned air from escaping, which can reduce heating and cooling costs by up to 40%. It keeps indoor temperatures consistent, so your HVAC system doesn’t have to work as hard.

Spray foam is not a fire retardant. To our knowledge there is not a spray foam product on the market which acts as a fire retardant. There are foam caulking products used in fire-stopping but that is not spray foam insulation.

Yes — closed-cell spray foam acts as both an air and moisture barrier. By sealing cracks and gaps, it helps prevent condensation and mold growth. This keeps your home or business dry, healthy, and protected year-round.

Yes, spray foam can be installed almost anywhere — attics, walls, crawlspaces, basements, and even under roofing systems. It expands to fill every gap, providing a continuous thermal and air barrier in hard-to-reach areas.

These terms generally refer to closed cell foam and open cell foam and describe the density of the foam as a weight per cubic foot. Closed cell foam insulation typically weighs 2 lbs per cubic foot. Open cell foam insulation typically weighs 0.5 lbs per cubic foot. There are other foam weights: 2.5 lb – 3 lb foam is typically used for spray foam roofs. Geotechnical foam ranges from 4 lbs to 9 lbs.

There are DIY kits available and we recommend caution using them. Aside from the personal safety concerns, spray foam needs to be mixed at an exact 1:1 ratio. Foam kits may achieve this under perfect conditions and there is also a very real possibility the foam can be off ratio. This is because the thickness (viscosity) of the two materials are very different (think mixing water and honey). That is why professional spray foam equipment heats the liquids to a point where their viscosity is even and then meters exact portions of each side.

951 Construction proudly serves homeowners and businesses across San Diego County, Riverside County, and surrounding Southern California areas. Our fully equipped spray foam truck allows us to bring professional insulation services directly to your job site — whether it’s a home, commercial building, or specialty project. No matter where you are in Southern California, our team is ready to deliver expert installation done right the first time.