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
Best Insulation Contractors in Belmont, CA (2026)
113 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Belmont: Attic Pros, CR Score 90/100; 4.8★ from 1,938 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Reactic Restoration, posts 24/7 hours; ranked #2 of 113.
- 12
Most-reviewed: Service Champions, 3,407 Google reviews at 4.9★, the most of 113 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
113 Belmont insulation contractors are ranked here by CR Score, from 8 published factors. 35 are open 24/7, 81 open Saturdays and 69 open Sundays, based on posted hours. The median Google rating is 4.9★ across 113 rated businesses.
Top 10 insulation contractors in Belmont at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Pros | 90 | 4.8★ (1,938) | Oakland, 16 mi away | 24/7 | Overall |
| 2 | Reactic Restoration | 87 | 5.0★ (12) | San Carlos, 1 mi away | 24/7 | Emergencies |
| 3 | Attic Star | 87 | 4.9★ (156) | Redwood City, 5 mi away | Sat · Sun · Evenings | — |
| 4 | Insulation Solutions | 86 | 5.0★ (11) | San Mateo, 2 mi away | 24/7 | — |
| 5 | Pro Attic Restoration | 85 | 4.9★ (48) | Hayward, 15 mi away | 24/7 | — |
| 6 | Reactic Restoration | 85 | 5.0★ (16) | Palo Alto, 10 mi away | 24/7 | — |
| 7 | American Attic | 85 | 5.0★ (219) | Oakland, 17 mi away | Sat · Sun | — |
| 8 | Atticare USA | 85 | 4.8★ (439) | San Leandro, 16 mi away | Sat · Sun · Evenings | — |
| 9 | Rywen Insulation Inc. | 85 | 5.0★ (151) | San Leandro, 15 mi away | Sat · Sun | — |
| 10 | Alley Cat - Rodent Exclusion Company | 84 | 4.9★ (413) | San Francisco, 19 mi away | Sat · Sun · Evenings | — |
The 113 best insulation contractors in Belmont, 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.
Based in San Carlos, 1 mi away
87/100CR ScoreRanked #2 because of its Google rating and availability: 5.0★ from 12 Google reviews, open 24/7.
- 5.0★ from 12 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 110 Glenn Way Suite #13, San Carlos, CA 94070
#3 Attic Star
Based in Redwood City, 5 mi away
87/100CR ScoreRanked #3 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
Based in San Mateo, 2 mi away
86/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 11 Google reviews, open 24/7.
- 5.0★ from 11 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1900 S Norfolk St, San Mateo, CA 94403
Based in Hayward, 15 mi away
85/100CR ScoreRanked #5 because of its Google rating and availability: 4.9★ from 48 Google reviews, open 24/7.
- 4.9★ from 48 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1340 A St, Hayward, CA 94541
Based in Palo Alto, 10 mi away
85/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 16 Google reviews, open 24/7.
- 5.0★ from 16 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 407 California Ave Unit 10, Palo Alto, CA 94306
Based in Oakland, 17 mi away
85/100CR ScoreRanked #7 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
#8 Atticare USA
Based in San Leandro, 16 mi away
85/100CR ScoreRanked #8 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
Based in San Leandro, 15 mi away
85/100CR ScoreRanked #9 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
Based in San Francisco, 19 mi away
84/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 413 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 413 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 9 AM–7 PM · Sun 9 AM–6 PM
- Address
- 1390 Market St #200, San Francisco, CA 94102
Based in Dublin, 19 mi away
84/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 279 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 279 Google reviews
- Hours
- Mon–Sun 7 AM–9 PM
Based in San Jose, 22 mi away
84/100CR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 3,407 Google reviews, the most Google reviews on this list (3,407).
- 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
#13 Trap Guard
Based in Redwood Shores, 10 mi away
83/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 13 Google reviews, open 24/7.
- 5.0★ from 13 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Oakland, 18 mi away
83/100CR ScoreRanked #14 because of its Google rating and availability: 4.7★ from 31 Google reviews, open 24/7.
- 4.7★ from 31 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2632 International Blvd #155b, Oakland, CA 94601
#15 Attic Elite
Based in Newark, 14 mi away
83/100CR ScoreRanked #15 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
Based in San Mateo, 4 mi away
83/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 66 Google reviews, open 24/7.
- 5.0★ from 66 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3 E 3rd Ave Unit 337, San Mateo, CA 94401
Based in Fremont, 18 mi away
82/100CR ScoreRanked #17 because of its Google rating and availability: 5.0★ from 11 Google reviews, open 24/7.
- 5.0★ from 11 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 44240 Fremont Blvd Suite 16, Fremont, CA 94538
Based in Pleasanton, 23 mi away
82/100CR ScoreRanked #18 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
Based in San Mateo, 5 mi away
82/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 9 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
- Address
- 119 Prague St, San Mateo, CA 94401
Based in Fremont, 22 mi away
82/100CR ScoreRanked #20 because of its Google rating and availability: 5.0★ from 19 Google reviews, open 24/7.
- 5.0★ from 19 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Mountain View, 14 mi away
82/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 34 Google reviews
- Hours
- Mon–Sun 9 AM–9 PM
- Address
- 472 Castro St, Mountain View, CA 94041
Based in San Jose, 23 mi away
82/100CR ScoreRanked #22 because of its Google rating and availability: 4.9★ from 1,142 Google reviews, open 24/7.
- 4.9★ from 1,142 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1310 N 4th St, San Jose, CA 95112
Based in Redwood Shores, 5 mi away
82/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 6 Google reviews
- Hours
- Mon–Sun 8 AM–7:30 PM
Based in Daly City, 14 mi away
81/100CR ScoreRanked #24 because of its Google rating and availability: 4.0★ from 4 Google reviews, open 24/7.
- 4.0★ from 4 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 500 King Dr #418, Daly City, CA 94015
Based in Fremont, 17 mi away
81/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 31 Google reviews
- Hours
- Mon–Sun 9 AM–9 PM
- Address
- 37364 Niles Blvd, Fremont, CA 94536
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 113 ranked insulation contractors here; the rest are on their profiles.
Also serving Belmont
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.
| Business | Google rating | Distance |
|---|---|---|
| Attic Bros of Milpitas | 5.0★ (2) | 22 mi |
| Attic Wise Cleaning | 5.0★ (2) | 21 mi |
| Bear Insulation and Services | 5.0★ (2) | 18 mi |
| Bella Construction & Strctrl | In Belmont | |
| Brandon's Attic Control | 5.0★ (2) | 19 mi |
| California Shingle & Shake Co | 4.3★ (22) | In Belmont |
| Certified Pro Restorations, INC | 5.0★ (1) | 9 mi |
| Emerald Insulation & Acoustical Inc. | 5.0★ (2) | 18 mi |
| Insulation & Air Duct Crew | 5.0★ (2) | 14 mi |
| My Steam Rug & Sofa Cleaning | 5.0★ (2) | 8 mi |
| Panda Heating & Cooling | 3.5★ (2) | 16 mi |
| Peak Core Insulation | 5.0★ (2) | 20 mi |
| PRO ATTIC RESTORATION | 5.0★ (2) | 15 mi |
| San Mateo Attic Insulation Now | 5.0★ (1) | 10 mi |
| Santa Clara A+ Insulation Service | 5.0★ (2) | 22 mi |
| SF Bay Attic Cleaning | 5.0★ (1) | 7 mi |
| Silver Peak Construction Group Inc. | 5.0★ (2) | 24 mi |
| Skybleu | 4.4★ (19) | In Belmont |
| Soundproofing Remodelers San Francisco Bay Area | 5.0★ (2) | 21 mi |
| Universal Home Improvement Inc | 4.3★ (17) | In Belmont |
How much do insulation contractors cost in Belmont?
National price ranges in USD, not adjusted for Belmont. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | $1,700 | $2,100 | $2,500 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range | October 2026 |
How we ranked Belmont insulation contractors
We scored 113 Belmont 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.
| Factor | Weight | Computed from | In Belmont data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
Insulation contractors in Belmont: frequently asked questions
Who is the best insulation contractor in Belmont?
By CR Score, the highest-ranked insulation contractor in Belmont, 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. Reactic Restoration (#2) and Attic Star (#3) follow. We ranked 113 insulation contractors on 8 factors, last updated October 22, 2026.
How many insulation contractors are there in Belmont?
ContractorsRanked ranks 113 insulation contractors serving Belmont, CA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in Belmont are open 24/7?
35 ranked insulation contractors in Belmont post 24/7 hours. The highest-ranked are Attic Pros (#1), Reactic Restoration (#2) and Insulation Solutions (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in Belmont work on weekends?
81 of 113 ranked insulation contractors post Saturday hours and 69 post Sunday hours. The highest-ranked open Saturdays are Attic Pros (#1), Reactic Restoration (#2) and Attic Star (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Belmont?
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 Belmont. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Belmont insulation contractors have?
The median Google rating among 113 rated insulation contractors in Belmont is 4.9★, with a median of 24 reviews. Service Champions has the most, 3,407 reviews, and ranks #12. 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 Belmont count in this ranking?
Yes, if they are within 25 mi of the Belmont 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 Belmont
- October 2026: CR Scores recalculated for 113 insulation contractors serving Belmont.
More insulation contractors and Belmont pages
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