Top-Rated Insulation Installers in Pasadena, CA

4 local companies ranked by 58 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

4Companies
58Google reviews
4.8★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in Pasadena are UltraSpan Insulation (4.9★, 20 reviews), SummitLayer Professional Insulation Services (4.8★, 13 reviews), PolarCore Insulation (4.7★, 15 reviews).

Insulation installers in Pasadena, ranked 4 listed

Sort by
  1. 1
    UltraSpan InsulationTop pickMost reviews
    4.9 (20 Google reviews)
    201 S Lake Ave, Pasadena, CA 91101
    Call (747) 774-8882Google reviewsDirections
  2. 2
    SummitLayer Professional Insulation ServicesTop pick
    4.8 (13 Google reviews)
    405 Cliff Dr, Pasadena, CA 91107
    Call (626) 988-8644Google reviewsDirections
  3. 3
    PolarCore InsulationTop pick
    4.7 (15 Google reviews)
    1905 Lincoln Ave, Pasadena, CA 91103
    Call (626) 653-4597Google reviewsDirections
  4. 4
    Pure Layer Insulation
    4.6 (10 Google reviews)
    953 S Raymond Ave, Pasadena, CA 91105
    Call (626) 899-9280WebsiteGoogle reviewsDirections

Together these 4 companies average 4.8★ across 58 reviews. UltraSpan Insulation has the most reviews (20).

Ranked by Google rating weighted by review count, collected September 2026. Rankings are never paid for. How we rank and how we make money.

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What a insulation costs in Pasadena

Typical installed priceVaries by area

Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.

Rebates open in PasadenaNone confirmed right now

Financing or future programs may still help. Check the rebate page before you sign.

Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.

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Why insulation matters in Pasadena

In Pasadena, the average January low is 8°C (46°F), colder than 7% of the 123 cities we track. Winters here are mild, so comfort and summer heat matter as much as heating bills. Air sealing and attic insulation still help most, and they also keep upstairs rooms cooler in summer.

Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.

Source: Open-Meteo historical weather data, 2015-2024.

Before you hire a insulation installer

  1. Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
  2. Ask for the R-value before and after for each area, and the material and depth they will install.
  3. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
  4. Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).

Before you call anyone, check what insulation rebates you can get in Pasadena. Many programs require approval or a registered contractor before work starts.

Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers in Pasadena.

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