206 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Monrovia: CURA Termite and Pest Control, CR Score 88/100; 4.9★ from 859 Google reviews; open 24/7.
Best for emergencies (open 24/7): Attic Rescue Insulation Contractor, posts 24/7 hours; ranked #4 of 206.
Most-reviewed: HomeShield Pest Control, 2,945 Google reviews at 5.0★, the most of 206 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
206 Monrovia insulation contractors are ranked here by CR Score, from 8 published factors. 30 are open 24/7, 147 open Saturdays and 130 open Sundays, based on posted hours. The median Google rating is 5.0★ across 206 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | CURA Termite and Pest Control | 88 | 4.9★ (859) | Anaheim, 24 mi away | 24/7 | Overall |
| 2 | Brad's Insulation | 86 | 4.9★ (94) | Azusa, 5 mi away | Sat · Sun · Evenings | — |
| 3 | HomeShield Pest Control | 85 | 5.0★ (2,945) | Los Angeles, 23 mi away | Sat · Evenings | Most reviews |
| 4 | Attic Rescue Insulation Contractor | 84 | 4.9★ (78) | Castaic, 22 mi away | 24/7 | Emergencies |
| 5 | UltraSpan Insulation | 84 | 4.9★ (20) | Pasadena, 8 mi away | 24/7 | — |
| 6 | NexGen HVAC & Plumbing | 84 | 4.7★ (538) | Arcadia, 3 mi away | 24/7 | — |
| 7 | Priority Attic Insulation | 84 | 4.6★ (47) | Glendora, 9 mi away | 24/7 | — |
| 8 | Pay Less Attic Insulation | 84 | 5.0★ (25) | Rosemead, 6 mi away | Sat · Sun · Evenings | — |
| 9 | Insulation Labs | 84 | 5.0★ (135) | Fullerton, 18 mi away | Sat · Sun · Evenings | — |
| 10 | Insulation Contractor - Alhambra | 83 | 4.4★ (7) | Alhambra, 8 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.9★ from 859 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Azusa, 5 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 94 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Los Angeles, 23 mi away
Ranked #3 because of its Google rating and review volume: 5.0★ from 2,945 Google reviews, the most Google reviews on this list (2,945).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Castaic, 22 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 78 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Pasadena, 8 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 20 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcadia, 3 mi away
Ranked #6 because of its Google rating and availability: 4.7★ from 538 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Glendora, 9 mi away
Ranked #7 because of its Google rating and availability: 4.6★ from 47 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rosemead, 6 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fullerton, 18 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 135 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Alhambra, 8 mi away
Ranked #10 because of its Google rating and availability: 4.4★ from 7 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcadia, 2 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 53 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Los Angeles, 17 mi away
Ranked #12 because of its Google rating and availability: 4.8★ from 48 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcadia, 2 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Covina, 8 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Los Angeles, 12 mi away
Ranked #15 because of its Google rating and availability: 4.9★ from 15 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in La Puente, 9 mi away
Ranked #16 because of its Google rating and availability: 4.0★ from 8 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duarte, 2 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Dimas, 10 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 27 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Los Angeles, 16 mi away
Ranked #19 because of its Google rating and availability: 4.9★ from 434 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Los Angeles, 13 mi away
Ranked #20 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Artesia, 20 mi away
Ranked #21 because of its Google rating and availability: 4.8★ from 51 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rancho Cucamonga, 25 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 168 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Bell, 18 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 59 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Montebello, 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 on 6 of 8 factors; credentials and recency not yet collected.
Based in Glendale, 17 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 46 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#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 206 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 |
|---|---|---|
| All Purpose Dryer Vent & Chimney Cleaning Serv. | 4.8★ (4) | In Monrovia |
| All Star Install LLC | 5.0★ (2) | 25 mi |
| Bob Mezzo Plastering | 5.0★ (2) | 20 mi |
| Contractor Monrovia Redzone | 5.0★ (2) | In Monrovia |
| Home Pro Remodeling | 3.5★ (40) | In Monrovia |
| Kiko's insulation corporation | 5.0★ (2) | 12 mi |
| Leos Insulation | 5.0★ (2) | 24 mi |
| Lone Star | 5.0★ (2) | 12 mi |
| NDM Insulation | 5.0★ (2) | 24 mi |
| Performance Contracting Inc | 5.0★ (2) | 23 mi |
| QUALITY FOAM | 5.0★ (2) | 5 mi |
| Semper fi Handyman | 2.5★ (2) | 16 mi |
| Smart Budget Insulation of Burbank | 3.0★ (2) | 18 mi |
| Smart Value Insulation | 5.0★ (2) | 5 mi |
| South Gate Insulation Pros | 5.0★ (2) | 17 mi |
| The Insulation Experts | 5.0★ (2) | 22 mi |
| Thermal Nest Insulation of Anaheim | 5.0★ (2) | 22 mi |
| Titan Insulation - Pasadena | 5.0★ (2) | 8 mi |
| Vasitos Construction | 5.0★ (2) | 9 mi |
| Western Industrial Ceramics | 5.0★ (2) | 15 mi |
National price ranges in USD, not adjusted for Monrovia. 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 206 Monrovia 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 Monrovia 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 |