Insulation that actually works.
Attic, wall, crawlspace, and spray foam insulation across San Diego County. Air-sealing, removal, and Title 24 documentation included. Local, answered by a real person, and matched with vetted installers, not a national call center.
What insulation services does Thermal Pro San Diego offer?
Attic, wall, crawlspace, garage, spray foam, blown-in, batts, rigid foam, removal, air-sealing, soundproofing, and radiant barrier. One crew. One call. The right method for your assembly.
Attic Insulation
R-38 to R-60 blown-in or batt, code-compliant for SD County.
Learn moreSpray Foam Insulation
Open- and closed-cell foam for walls, attics, and rim joists.
Learn moreBlown-In Insulation
Cellulose or fiberglass loose-fill, machine-installed.
Learn moreWall Insulation
Drill-and-fill or open-cavity batt for exterior walls.
Learn moreCrawlspace Insulation
Rim joist, subfloor, and vapor barriers under the house.
Learn moreGarage Insulation
Walls, ceiling, and door insulation for converted spaces.
Learn moreInsulation Removal
Vacuum-extraction of damaged or contaminated insulation.
Learn moreAir Sealing
Caulk, foam, and weatherstripping for the building envelope.
Learn moreRigid Foam Insulation
EPS, XPS, and polyiso boards for walls, roofs, and slabs.
Learn moreBatt Insulation
Fiberglass and mineral wool batts for studs and joists.
Learn moreSoundproofing Insulation
Mineral wool and dense-pack assemblies for acoustic isolation.
Learn moreRadiant Barrier
Foil radiant barrier for hot SoCal attic decks.
Learn moreWhy do San Diego homeowners choose Thermal Pro San Diego?
San Diego insulation has specific challenges. Coastal humidity drives air-sealing on bluff homes. Inland summers in El Cajon and Escondido push attics past 150°F. Backcountry winters in Julian freeze rim joists. Same crew, same standards, different priorities for different zones.
- Air-sealing first, every time. Insulation slows heat. Air-sealing stops the leaks that move it. We do both.
- Flat-rate pricing, no hourly games. You hear the price before we start. Free in-home estimate, no obligation.
- Title 24 documentation included. Permit-ready specs, R-value verification, depth markers on rafters. Zero paperwork on you.
- The right method for your assembly. Spray foam, blown-in, batts, rigid foam, we pick what fits your home, not what we want to sell.
Where do we install insulation in San Diego County?
Same crew, same standards, from the coast to the backcountry. Pick your city to see insulation details specific to your area, climate notes, recommended R-values, and local assembly considerations.
Ready to make your house actually hold temperature?
Free in-home estimate. Same-week scheduling on most jobs.
What do homeowners ask about insulation in San Diego?
A few of the things homeowners ask before they hire us. Don't see your question? Call us at (858) 925-5546.
All FAQsWhat areas in San Diego County do you service?
We cover every city in San Diego County, coastal (Encinitas, Carlsbad, Coronado, Imperial Beach), Central (San Diego, La Mesa), North County Inland (Escondido, San Marcos, Vista, Poway), East County (El Cajon, Santee, Lakeside, Alpine), South County (Chula Vista, National City), and the backcountry communities (Julian, Pine Valley, Ramona).
How fast can you come out for an estimate?
Same-week on most estimates. The job itself usually books 1–2 weeks out depending on scope. Insulation removal for rodent or water damage gets priority dispatch.
How much does attic insulation cost?
$1.40 to $2.80 per square foot installed, depending on R-value target and access. A typical 1,500 sq ft attic going from R-19 to R-49 with air-sealing lands in the $2,500 to $4,500 range. Spray foam runs $1.50 to $5.50 per board foot. Free in-home estimates.
What R-value do I need in San Diego?
California Title 24 sets R-30 minimum on a roof alteration and R-38 on most new or fully reinsulated attics. We usually recommend R-49, the marginal cost is small and the comfort difference is real. Inland and East County homes benefit most.
Spray foam, blown-in, or batts, which one?
Depends on the assembly. Spray foam handles unvented roof decks, rim joists, and crawlspaces. Blown-in cellulose is the workhorse for attic top-ups and dense-pack walls. Batts work in open framing for new construction or additions. We pick the one that fits your home, not the one we want to sell.
Get a ballpark before you book
Real pricing, honest comparisons, and plain-language guides based on actual San Diego County jobs. No email required, no sales sequence.
R-value & cost calculator
Estimate target R-value, board feet of foam or pounds of cellulose, and an install price band based on your zip code, attic size, and existing insulation depth.
Open the calculator CompareSpray foam vs. cellulose
Real cost-per-R-value math, where each one wins, and which assemblies make the choice obvious. SD-specific examples.
Read the comparison CompareTop-up vs. full removal
When the existing insulation can be saved, when it has to come out, and how to tell the difference. Photos and decision tree.
Read the comparison GuidesFull blog library
Cost guides, how-tos, and data-driven deep dives on San Diego-specific topics.
Browse guides FAQMost-asked questions
Cost, R-value targets, removal vs top-up, air-sealing, garage conversions, straight answers, no upsell.
Read FAQs ResourcesVideo how-tos
DIY walkthroughs for common jobs you can handle yourself.
Watch guides