Insulation Materials & Types in Burbank, CA

There is no single “best” material — it depends on the application. For attics in existing Burbank homes, blown-in cellulose or fiberglass at R-38 to R-60 offers excellent cost-effectiveness. For air sealing combined with thermal performance, closed-cell spray foam is the premium option. In wildfire-risk areas, mineral wool is strongly recommended for its non-combustible properties. A professional assessment helps match material to your specific home.

California’s Title 24 Energy Standards for Climate Zone 9 require a minimum of R-38 in attic assemblies for new construction and qualifying renovations. However, energy experts and utility programs often recommend R-49 to R-60 for Burbank homes, as the additional material cost is recovered quickly through reduced air conditioning bills during long, hot summers. Wall insulation minimums are typically R-13 in a 2×4 cavity or R-20 in a 2×6 cavity.

Fiberglass batts are the most affordable option at roughly $0.30–$0.80 per square foot installed. Blown-in cellulose and fiberglass run $0.50–$1.20/sq ft. Mineral wool batts cost $0.80–$1.40/sq ft. Rigid foam board ranges from $0.70–$2.00/sq ft depending on type and thickness. Spray foam is the most expensive at $1.00–$1.50/sq ft (open-cell) and $2.00–$3.50/sq ft (closed-cell). Higher upfront costs for premium materials are often offset by greater energy savings and longer service life.

For most Burbank homeowners, yes — attic insulation delivers the fastest return on investment because radiant heat gain through the roof is the dominant summer energy challenge. However, wall insulation is equally important for overall building envelope performance. Homes with little or no wall insulation lose significant energy year-round. Ideally, both areas should be addressed, but if budget is limited, start with the attic and add wall insulation as resources allow.

Homeowners in Burbank who upgrade from no insulation or minimal older insulation to properly installed R-38 to R-60 attic insulation commonly report cooling cost reductions of 20–40%. The U.S. Department of Energy estimates that proper insulation and air sealing can reduce total home heating and cooling costs by up to 15% compared to uninsulated homes. Exact savings depend on your current insulation levels, home size, HVAC efficiency, and thermostat habits.

Yes. California homeowners may access several programs. Southern California Edison and SoCalGas offer rebates for qualifying insulation improvements under their energy efficiency programs. Federally, the Inflation Reduction Act’s Energy Efficient Home Improvement Credit (25C) provides a tax credit of up to 30% of insulation material costs (up to $1,200 annually) for eligible upgrades. Income-qualified households may also qualify for free or deeply subsidized insulation through programs like TECH Clean California or LIHEAP. We help our customers identify all applicable programs.

In most cases, yes — existing attic floor insulation can be supplemented with additional blown-in material as long as the existing insulation is dry, undamaged, and free of mold. Adding blown-in cellulose or fiberglass on top of old batts is a common and cost-effective upgrade for Burbank homes with R-11 or R-19 attic insulation. Before adding material, it is important to air-seal around light fixtures, top plates, and HVAC penetrations to prevent conditioned air from escaping into the attic.

Closed-cell spray foam is often worth the premium for specific applications in Burbank — particularly for sealing and insulating attic roof decks (creating a conditioned attic), crawl space walls and floors, rim joists, and hard-to-reach cavities. Its combined air-sealing and insulating properties can dramatically outperform less expensive materials in problem areas. For large open attic floors where straightforward depth can achieve target R-values, blown-in insulation usually delivers better value dollar-for-dollar.