Advanced Insulation System
Verified Pro
~2 years online5.0(132)
Insulation Services in San Diego, CA
Compare 25 insulation services contractors near you in San Diego and surrounding area with an average rating of 4.8/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated April 2, 2026
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4.912½+ years onlineBay Insulation Supply of San Diego Inc.
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Insulation Services in San Diego, CA
San Diego insulation contractors in this directory cover La Jolla, Pacific Beach, Carmel Valley, North Park, Rancho Santa Fe, and East County communities. San Diego falls in IECC Climate Zone 3B-coastal — code asks for R-30 to R-38 attics depending on roof type. Most pre-1980 homes have R-11 to R-19 of compressed batts. Topping up with blown cellulose or fiberglass runs $1.40-$2.20 per sq ft. Closed-cell foam in walls or under-roof runs $4.50-$7.50/sq ft at 2 inches.
California Title 24 enforces strict envelope requirements. SDG&E and SoCalGas both offer home-performance rebates. The 25C federal tax credit covers 30% of qualifying insulation up to $1,200/year. Coastal properties also benefit from continuous exterior rigid foam to manage marine-layer humidity and condensation.
Frequently Asked Questions
- What R-value should my San Diego attic have?
- Title 24 and IECC Climate Zone 3B-coastal ask for R-30 to R-38 in attics. Most pre-1980 homes have R-11 to R-19 — topping up with blown insulation typically runs $1.40-$2.20/sq ft and is the highest-ROI single envelope upgrade.
- Should I encapsulate my San Diego crawlspace?
- For coastal properties with high marine-layer humidity, yes — encapsulated crawlspaces with sealed vents, vapor barrier, and conditioned-space treatment dramatically reduce moisture migration into the floor system. Cost runs $4,500-$9,500 for a typical 1,500 sq ft footprint.
- Are there rebates for San Diego insulation upgrades?
- SDG&E and SoCalGas home-performance rebates run $300-$2,500 for attic, wall, and crawlspace upgrades. The 25C federal credit covers 30% up to $1,200/year. Income-qualified households may qualify for HEEHRA rebates as they roll out.
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