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The 10 Best Insulation Contractors in Long Beach (2026)
This list ranks the best insulation contractors serving the Long Beach area based on Google review data, updated for 2026. We use a Bayesian-style approach that balances average rating with the number of reviews so businesses with many high ratings rise to the top while small-sample outliers are moderated. The selection reflects contractors categorized on Google as insulation specialists and emphasizes firms that Long Beach homeowners are actually reviewing. Whether you’re insulating a retrofit, new build, or commercial space, this guide points to locally reviewed options to help start your search.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Ram Insulation Inc.
Ram Insulation Inc. earns the top spot thanks to a perfect 5.0 Google rating combined with a substantial 87 reviews, which gives it strong weighted credibility in our scoring method. Listed as an insulation contractor and operating from Signal Hill, its mix of a flawless average and high review volume places it above competitors with fewer votes. The ranking reflects both quality signal and customer frequency rather than a single metric.
The full ranking
Belmont Insulation
Belmont Insulation appears as an insulation contractor boasting a 5.0 average across 30 Google reviews; no address is shown in the Google data we used.
30 reviews
SuperGreen Insulation
SuperGreen Insulation is rated 5.0 with 21 reviews and is categorized as an insulation contractor located in Carson (21601 Avalon Blvd #212).
21 reviews
Coast Insulation Huntington Beach
Coast Insulation Huntington Beach holds a 5.0 Google rating from 14 reviews and is listed under the insulation contractor category, though no precise address was provided in the dataset.
14 reviews
Crest Insulation Lakewood
Crest Insulation Lakewood carries a 5.0 average based on 11 Google reviews and is identified as an insulation contractor without an address in the supplied data.
11 reviews
Shiffer Insulation
Shiffer Insulation is shown as an insulation contractor with a 5.0 rating from 10 reviews, based at 17550 Bloomfield Ave in Cerritos.
10 reviews
Alpine Insulation – Inglewood CA
Alpine Insulation – Inglewood CA has a 4.9 rating accumulated from 43 Google reviews and is listed as an insulation contractor in Inglewood (2924 W Manchester Blvd).
43 reviews
Master Insulation Corp
Master Insulation Corp is rated 4.9 with 39 reviews on Google and appears in the insulation contractor category, located in Cypress (5762 Lincoln Ave).
39 reviews
Long Beach Insulation
Long Beach Insulation posts a 4.8 average from 12 Google reviews and is categorized as an insulation contractor with an address on E Ocean Blvd in Long Beach (3700 E Ocean Blvd).
12 reviews
Petrochem Insulation Inc
Petrochem Insulation Inc shows a 4.7 rating based on 16 Google reviews and is listed as an insulation contractor located in East Compton (19010 Alameda St).
16 reviews
Frequently asked questions
How should I choose an insulation contractor?
Look for contractors with strong, recent customer reviews, proper licensing and insurance, and clear written estimates. Ask about the specific insulation materials and R-values they recommend, and request references for similar projects in your area.
What should I check before hiring an insulation company?
Verify their business license and insurance, confirm the scope of work in a written contract, and ensure any warranties or cleanup responsibilities are documented. Also ask how they handle ventilation and air sealing, since those affect overall performance.
When is the best time to schedule insulation work?
Many homeowners schedule insulation during moderate weather when access to attics and crawlspaces is easiest, but projects can be done year-round. If you’re aiming to improve comfort before seasonal extremes, plan a few weeks ahead to allow for estimates and scheduling.
How was this ranking created?
This list is built from Google review data and uses a Bayesian-style weighting that considers both average rating and number of reviews to reduce the impact of small-sample outliers. The entries reflect the Google category “Insulation contractor” and the most recent review counts available when updated for 2026.