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ContractorsRanked

Best Insulation Contractors in Fremont, CA (2026)

108 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Fremont: Attic Pros, CR Score 90/100; 4.8★ from 1,938 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): 911 Attic Insulation, posts 24/7 hours; ranked #2 of 108.

  3. 6

    Most-reviewed: Service Champions, 4,721 Google reviews at 4.9★, the most of 108 ranked; ranked #6.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

108 Fremont insulation contractors are ranked here by CR Score, from 8 published factors. 35 are open 24/7, 75 open Saturdays and 70 open Sundays, based on posted hours. The median Google rating is 5.0★ across 108 rated businesses.

Top 10 insulation contractors in Fremont at a glance

Top 10 insulation contractors in Fremont at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Attic Pros904.8★ (1,938)Oakland, 17 mi away24/7Overall
2911 Attic Insulation885.0★ (19)Fremont24/7Emergencies
3Reactic Restoration875.0★ (11)Fremont24/7—
4Pro Attic Restoration864.9★ (48)Hayward, 10 mi away24/7—
5Service Champions864.9★ (3,407)San Jose, 11 mi away24/7—
6Service Champions864.9★ (4,721)Livermore, 14 mi away24/7Most reviews
7Attic Elite864.9★ (474)Newark, 2 mi awaySun—
8Regal Insulation Services855.0★ (31)FremontSat · Sun · Evenings—
9Service Champions854.8★ (2,337)Pleasanton, 11 mi away24/7—
10EcoGuard Pest Management854.9★ (279)Dublin, 14 mi awaySat · Sun · Evenings—

The 108 best insulation contractors in Fremont, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Fremont

    #1 Attic Pros

    Based in Oakland, 17 mi away

    90/100CR Score

    Ranked #1 because of its Google rating and availability: 4.8★ from 1,938 Google reviews, open 24/7.

    • 4.8★ from 1,938 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    718 Douglas Ave, Oakland, CA 94603
    View profile for Attic Pros(800) 543-0382

  5. #5 Service Champions

    Based in San Jose, 11 mi away

    86/100CR Score

    Ranked #5 because of its Google rating and availability: 4.9★ from 3,407 Google reviews, open 24/7.

    • 4.9★ from 3,407 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2161 Del Franco St, San Jose, CA 95131
    View profile for Service Champions(408) 549-7376

  6. #6 Service Champions

    Based in Livermore, 14 mi away

    86/100CR Score

    Ranked #6 because of its Google rating and review volume: 4.9★ from 4,721 Google reviews, the most Google reviews on this list (4,721).

    • 4.9★ from 4,721 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    207 Boeing Ct, Livermore, CA 94551
    View profile for Service Champions(925) 966-1366

  7. #7 Attic Elite

    Based in Newark, 2 mi away

    86/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 474 Google reviews, listed on Google as “Insulation contractor”.

    • 4.9★ from 474 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat closed · Sun 8 AM–6 PM
    Address
    37310 Cedar Blvd Suite H, Newark, CA 94560
    View profile for Attic Elite(888) 805-8848

  9. #9 Service Champions

    Based in Pleasanton, 11 mi away

    85/100CR Score

    Ranked #9 because of its Google rating and availability: 4.8★ from 2,337 Google reviews, open 24/7.

    • 4.8★ from 2,337 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7020 Commerce Dr, Pleasanton, CA 94588
    View profile for Service Champions(925) 248-3458

  11. #11 Attic Repair Guys

    Based in Fremont

    85/100CR Score

    Ranked #11 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 23 Google reviews
    Hours
    Mon–Sat 8 AM–5 PM · Sun 9 AM–2 PM
    Address
    3051 Quantum Dr #2411, Fremont, CA 94538
    View profile for Attic Repair Guys(415) 737-9844

  12. #12 American Attic

    Based in Oakland, 16 mi away

    85/100CR Score

    Ranked #12 because of its Google rating and trade focus: 5.0★ from 219 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 219 Google reviews
    Hours
    Mon–Sun 7 AM–6 PM
    Address
    2721 106th Ave, Oakland, CA 94605
    View profile for American Attic(800) 461-2017

  13. #13 Atticare USA

    Based in San Leandro, 15 mi away

    84/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.8★ from 439 Google reviews, listed on Google as “Insulation contractor”.

    • 4.8★ from 439 Google reviews
    Hours
    Mon–Fri 8 AM–7 PM · Sat–Sun 9 AM–6 PM
    Address
    303 W Joaquin Ave Unit #103, San Leandro, CA 94577
    View profile for Atticare USA(866) 647-2811

  15. #15 Attic Star

    Based in Redwood City, 13 mi away

    84/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.9★ from 156 Google reviews, listed on Google as “Insulation contractor”.

    • 4.9★ from 156 Google reviews
    Hours
    Mon–Thu 7 AM–7:30 PM · Fri 7 AM–6 PM · Sat–Sun 7 AM–7:30 PM
    Address
    2847 Middlefield Rd, Redwood City, CA 94063
    View profile for Attic Star(800) 444-8180

  17. #17 Service Champions

    Based in Livermore, 14 mi away

    84/100CR Score

    Ranked #17 because of its Google rating and availability: 4.9★ from 1,331 Google reviews, open 24/7.

    • 4.9★ from 1,331 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    96 Rickenbacker Cir, Livermore, CA 94551
    View profile for Service Champions(925) 397-4867

  19. #19 Rywen Insulation Inc.

    Based in San Leandro, 16 mi away

    84/100CR Score

    Ranked #19 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 151 Google reviews
    Hours
    Mon–Sat 8 AM–6 PM · Sun 9 AM–4 PM
    Address
    456 Hester St, San Leandro, CA 94577
    View profile for Rywen Insulation Inc.(415) 770-0342

  20. #20 Attic Pros

    Based in San Jose, 20 mi away

    84/100CR Score

    Ranked #20 because of its Google rating and availability: 4.7★ from 104 Google reviews, open 24/7.

    • 4.7★ from 104 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3071 Monterey Rd suit b, San Jose, CA 95111
    View profile for Attic Pros(800) 543-0382

Insulation contractors ranked #26 to #50

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 108 ranked insulation contractors here; the rest are on their profiles.

insulation contractors in Fremont, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Delta Spray Foam Insulation825.0★ (34)12 mi
27Trap Guard825.0★ (13)14 mi
28Next Edge Insulation825.0★ (3)11 mi
29Reactic Restoration824.7★ (31)21 mi
30Atticguard Pro825.0★ (4)In Fremont
31Bay Valley Insulation Inc824.0★ (4)In Fremont
32All State Insulation825.0★ (25)In Fremont
33Eagle Air824.9★ (549)18 mi
34American Attics825.0★ (89)9 mi
35Los Gatos Roofing814.8★ (291)13 mi
36Greenshield Insulation815.0★ (14)12 mi
37Finest Heating & air814.9★ (87)10 mi
38Attic City San Jose814.6★ (14)17 mi
39Fremont Insulation Pros805.0★ (6)9 mi
40Newhaus Roofing & Construction804.9★ (148)15 mi
41Everlast Attic805.0★ (7)18 mi
42AJ Heating & Cooling Inc.805.0★ (32)5 mi
43Trio Heating & Air Hayward805.0★ (148)14 mi
44Attic Masters Insulation Services805.0★ (7)19 mi
45Reactic Restoration805.0★ (52)13 mi
46AttiCali Insulation & Rodents Proofing804.9★ (8)In Fremont
47Insulation Labs805.0★ (6)12 mi
48Attic Bros of San Jose794.6★ (7)14 mi
49AttiCal Insulation and Rodents795.0★ (11)17 mi
50Patriots Restoration795.0★ (6)13 mi

Also serving Fremont

20 more insulation contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked insulation contractors serving Fremont
BusinessGoogle ratingDistance
AIS Heating & Air Conditioning4.9★ (723)In Fremont
Alcal Specialty Contracting Roofing Division - Fremont5.0★ (2)In Fremont
ALL BAY INSULATION & HVAC, INC.In Fremont
Attic Bros of Milpitas5.0★ (2)10 mi
Attic Done RightIn Fremont
Attic Wise Cleaning5.0★ (2)8 mi
BAY AREA INSULATION SERVICES INC.In Fremont
Bear Insulation and Services5.0★ (2)8 mi
Campos Construction5.0★ (6)In Fremont
Construction & More5.0★ (65)In Fremont
Fremont Stucco & Plastering4.6★ (14)In Fremont
Insulation & Air Duct Crew5.0★ (2)9 mi
Lake Michigan Roofing Pro4.8★ (78)In Fremont
Martin Brothers Roofing4.8★ (104)In Fremont
Performance Contracting Inc3.0★ (1)In Fremont
Premium Shield5.0★ (1)In Fremont
PRO ATTIC RESTORATION5.0★ (2)10 mi
Quality Roofing Fremont CA4.8★ (36)In Fremont
Repcold Distributors3.7★ (3)In Fremont
Santa Clara A+ Insulation Service5.0★ (2)11 mi

How much do insulation contractors cost in Fremont?

National price ranges in USD, not adjusted for Fremont. Each row names its basis and the month we checked it.

How much do insulation contractors cost in Fremont?
JobLowTypicalHighBasisChecked
Attic insulation$1,700$2,100$2,500Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national rangeOctober 2026

How we ranked Fremont insulation contractors

We scored 108 Fremont insulation contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Fremont data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Insulation contractors in Fremont: frequently asked questions

Who is the best insulation contractor in Fremont?

By CR Score, the highest-ranked insulation contractor in Fremont, CA is Attic Pros with a CR Score of 90/100. It has 4.8★ from 1,938 Google reviews. It is open 24/7. 911 Attic Insulation (#2) and Reactic Restoration (#3) follow. We ranked 108 insulation contractors on 8 factors, last updated October 22, 2026.

How many insulation contractors are there in Fremont?

ContractorsRanked ranks 108 insulation contractors serving Fremont, CA. 9 of them are based in Fremont; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which insulation contractors in Fremont are open 24/7?

35 ranked insulation contractors in Fremont post 24/7 hours. The highest-ranked are Attic Pros (#1), 911 Attic Insulation (#2) and Reactic Restoration (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which insulation contractors in Fremont work on weekends?

75 of 108 ranked insulation contractors post Saturday hours and 70 post Sunday hours. The highest-ranked open Saturdays are Attic Pros (#1), 911 Attic Insulation (#2) and Reactic Restoration (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does attic insulation cost in Fremont?

Attic insulation typically costs $1,700 to $2,500, with $2,100 typical (Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range). This is a national range, not adjusted for Fremont. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Fremont insulation contractors have?

The median Google rating among 108 rated insulation contractors in Fremont is 5.0★, with a median of 24 reviews. Service Champions has the most, 4,721 reviews, and ranks #6. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank insulation contractors?

Each insulation contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Do insulation contractors outside Fremont count in this ranking?

Yes, if they are within 25 mi of the Fremont city center, our service radius for insulation contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Update log for Fremont

  1. October 2026: CR Scores recalculated for 108 insulation contractors serving Fremont.

More insulation contractors and Fremont pages

Other trades in Fremont