228 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Walnut: CURA Termite and Pest Control, CR Score 62/100; 4.9★ from 859 Google reviews; open 24/7.
Best for emergencies (open 24/7): Priority Attic Insulation, posts 24/7 hours; ranked #5 of 228.
Most-reviewed: NexGen HVAC & Plumbing, 2,250 Google reviews at 4.7★, the most of 228 ranked; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
228 Walnut insulation contractors are ranked here by CR Score, from ten published factors. 30 are open 24/7, 170 open Saturdays and 146 open Sundays, based on posted hours. The median Google rating is 5.0★ across 228 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | CURA Termite and Pest Control | 62 | 4.9★ (859) | Anaheim, 15 mi away | 24/7 | Overall |
| 2 | Attic Projects | 60 | 4.9★ (584) | Orange, 16 mi away | Sat · Sun · Evenings | — |
| 3 | Insulation Labs | 60 | 5.0★ (135) | Fullerton, 9 mi away | Sat · Sun · Evenings | — |
| 4 | Brad's Insulation | 59 | 4.9★ (94) | Azusa, 9 mi away | Sat · Sun · Evenings | — |
| 5 | Priority Attic Insulation | 58 | 4.6★ (47) | Glendora, 8 mi away | 24/7 | Emergencies |
| 6 | Attic Projects | 58 | 5.0★ (168) | Rancho Cucamonga, 18 mi away | Sat · Sun · Evenings | — |
| 7 | Gopher Patrol | 58 | 4.9★ (182) | Riverside, 23 mi away | 24/7 | — |
| 8 | Pro Attic Insulation&attic services | 57 | 4.6★ (30) | Avocado Heights, 4 mi away | Sat · Sun · Evenings | — |
| 9 | First Defense Insulation | 57 | 4.8★ (31) | Covina, 6 mi away | Sat · Sun · Evenings | — |
| 10 | All | 57 | 4.9★ (27) | San Dimas, 6 mi away | Sat · Sun · Evenings | — |
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: 4.9★ from 859 Google reviews, listed on Google as “Insulation contractor”.
Based in Orange, 16 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 584 Google reviews, listed on Google as “Insulation contractor”.
Based in Fullerton, 9 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 135 Google reviews, listed on Google as “Insulation contractor”.
Based in Azusa, 9 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 94 Google reviews, listed on Google as “Insulation contractor”.
Based in Glendora, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.6★ from 47 Google reviews, listed on Google as “Insulation contractor”.
Based in Rancho Cucamonga, 18 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 168 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 23 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 182 Google reviews, listed on Google as “Insulation contractor”.
Based in Avocado Heights, 4 mi away
Ranked #8 because of its Google rating and trade focus: 4.6★ from 30 Google reviews, listed on Google as “Insulation contractor”.
Based in Covina, 6 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based in San Dimas, 6 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 27 Google reviews, listed on Google as “Insulation contractor”.
Based in Anaheim, 12 mi away
Ranked #11 because of its Google rating and review volume: 4.7★ from 2,250 Google reviews, the most in Walnut.
Based in Artesia, 16 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 51 Google reviews, listed on Google as “Insulation contractor”.
Based in Fullerton, 11 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 44 Google reviews, listed on Google as “Insulation contractor”.
Based in West Covina, 3 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based in La Puente, 5 mi away
Ranked #15 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based in Montclair, 10 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based in Placentia, 11 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based in Fullerton, 12 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based in Placentia, 10 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
Based in Fullerton, 11 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 61 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 23 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 155 Google reviews, listed on Google as “Insulation contractor”.
Based in Anaheim, 11 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
Based in Rosemead, 12 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based in Anaheim, 12 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based in Santa Fe Springs, 12 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 25 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 228 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 |
|---|---|---|
| Air CareSaver - Air Conditioning and Heating | 4.9★ (268) | In Walnut |
| ALCAL Specialty Contracting Ontario - Home Service Division | 3.0★ (2) | 19 mi |
| All Star Install LLC | 5.0★ (2) | 17 mi |
| Bob Mezzo Plastering | 5.0★ (2) | 12 mi |
| Clarion Construction | 4.7★ (6) | In Walnut |
| Contractor Monrovia Redzone | 5.0★ (2) | 12 mi |
| Kiko's insulation corporation | 5.0★ (2) | 11 mi |
| Lone Star | 5.0★ (2) | 11 mi |
| NDM Insulation | 5.0★ (2) | 16 mi |
| Performance Contracting Inc | 5.0★ (2) | 11 mi |
| QUALITY FOAM | 5.0★ (2) | 7 mi |
| Semper fi Handyman | 2.5★ (2) | 9 mi |
| Smart Value Insulation | 5.0★ (2) | 9 mi |
| South Gate Insulation Pros | 5.0★ (2) | 18 mi |
| Sunshine Roofing Inc | 1.7★ (12) | In Walnut |
| Thermal Energy Products | 3.0★ (2) | 17 mi |
| Thermal Nest Insulation of Anaheim | 5.0★ (2) | 12 mi |
| Titan Insulation - Pasadena | 5.0★ (2) | 18 mi |
| Vasitos Construction | 5.0★ (2) | 4 mi |
| Western Industrial Ceramics | 5.0★ (2) | 12 mi |
National price ranges in USD, not adjusted for Walnut. 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 228 Walnut 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 Walnut 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 |