109 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Redwood City: Attic Pros, CR Score 62/100; 4.8★ from 1,938 Google reviews; open 24/7.
Best for emergencies (open 24/7): Reactic Restoration, posts 24/7 hours; ranked #3 of 109.
Most-reviewed: Service Champions, 3,407 Google reviews at 4.9★, the most of 109 ranked; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
109 Redwood City insulation contractors are ranked here by CR Score, from ten published factors. 34 are open 24/7, 79 open Saturdays and 68 open Sundays, based on posted hours. The median Google rating is 5.0★ across 109 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Pros | 62 | 4.8★ (1,938) | Oakland, 18 mi away | 24/7 | Overall |
| 2 | Attic Star | 62 | 4.9★ (156) | Redwood City | Sat · Sun · Evenings | — |
| 3 | Reactic Restoration | 59 | 5.0★ (12) | San Carlos, 3 mi away | 24/7 | Emergencies |
| 4 | Attic Elite | 59 | 4.9★ (474) | Newark, 12 mi away | Sun | — |
| 5 | Atticare USA | 59 | 4.8★ (439) | San Leandro, 17 mi away | Sat · Sun · Evenings | — |
| 6 | Reactic Restoration | 58 | 5.0★ (16) | Palo Alto, 7 mi away | 24/7 | — |
| 7 | American Attic | 58 | 5.0★ (219) | Oakland, 19 mi away | Sat · Sun | — |
| 8 | Rywen Insulation Inc. | 58 | 5.0★ (151) | San Leandro, 17 mi away | Sat · Sun | — |
| 9 | Insulation Solutions | 58 | 5.0★ (11) | San Mateo, 6 mi away | 24/7 | — |
| 10 | Trap Guard | 58 | 5.0★ (13) | Redwood Shores, 6 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.8★ from 1,938 Google reviews, listed on Google as “Insulation contractor”.
Based in Redwood City
Ranked #2 because of its Google rating and trade focus: 4.9★ from 156 Google reviews, listed on Google as “Insulation contractor”.
Based in San Carlos, 3 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based in Newark, 12 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 474 Google reviews, listed on Google as “Insulation contractor”.
Based in San Leandro, 17 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 439 Google reviews, listed on Google as “Insulation contractor”.
Based in Palo Alto, 7 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based in Oakland, 19 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 219 Google reviews, listed on Google as “Insulation contractor”.
Based in San Leandro, 17 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “Insulation contractor”.
Based in San Mateo, 6 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based in Redwood Shores, 6 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based in Dublin, 20 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 279 Google reviews, listed on Google as “Insulation contractor”.
Based in San Francisco, 23 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 413 Google reviews, listed on Google as “Insulation contractor”.
Based in Hayward, 16 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “Insulation contractor”.
Based in San Jose, 19 mi away
Ranked #14 because of its Google rating and review volume: 4.9★ from 3,407 Google reviews, the most in Redwood City.
Based in Mountain View, 11 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Insulation contractor”.
Based in Los Gatos, 23 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 86 Google reviews, listed on Google as “Insulation contractor”.
Based in Fremont, 15 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based in San Mateo, 8 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based in Fremont, 20 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Insulation contractor”.
Based in Fremont, 16 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based in Redwood Shores, 6 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based in Oakland, 21 mi away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based in San Jose, 20 mi away
Ranked #23 because of its Google rating and review volume: 4.9★ from 1,142 Google reviews.
Based in Pleasanton, 23 mi away
Ranked #24 because of its Google rating and review volume: 4.8★ from 2,337 Google reviews.
Based in Fremont, 16 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
#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 109 ranked insulation contractors here; the rest are on their profiles.
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 |
|---|---|---|
| Adroit Builders Inc | 5.0★ (1) | In Redwood City |
| Attic Bros of Milpitas | 5.0★ (2) | 19 mi |
| Attic Wise Cleaning | 5.0★ (2) | 19 mi |
| Bear Insulation and Services | 5.0★ (2) | 15 mi |
| Brandon's Attic Control | 5.0★ (2) | 21 mi |
| Builders Energy Products | In Redwood City | |
| Eco Air Cooling and Heating | 5.0★ (28) | In Redwood City |
| Emerald Insulation & Acoustical Inc. | 5.0★ (2) | 21 mi |
| HBG Painting Services & Chimney Inspection Ltd | 5.0★ (5) | In Redwood City |
| Insulation & Air Duct Crew | 5.0★ (2) | 14 mi |
| Leader Restoration | 5.0★ (45) | In Redwood City |
| Luxora ADU Builders | 5.0★ (5) | In Redwood City |
| My Steam Rug & Sofa Cleaning | 5.0★ (2) | 4 mi |
| Panda Heating & Cooling | 3.5★ (2) | 18 mi |
| Peak Core Insulation | 5.0★ (2) | 23 mi |
| PRO ATTIC RESTORATION | 5.0★ (2) | 16 mi |
| Redwood Roofing Pro | 4.9★ (74) | In Redwood City |
| Santa Clara A+ Insulation Service | 5.0★ (2) | 20 mi |
| Silver Peak Construction Group Inc. | 5.0★ (2) | 21 mi |
| Stan's Attic and Insulation | In Redwood City |
National price ranges in USD, not adjusted for Redwood City. 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 |
We scored 109 Redwood City insulation contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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 Redwood City data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |