29 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Crestline: NexGen HVAC & Plumbing, CR Score 88/100; 4.7★ from 1,769 Google reviews; open 24/7.
Best for emergencies (open 24/7): NexGen HVAC & Plumbing, posts 24/7 hours; ranked #3 of 29.
Most-reviewed: RKM Heating and Air Conditioning, 1,073 Google reviews at 4.9★, the most of 29 ranked after NexGen HVAC & Plumbing; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
29 Crestline insulation contractors are ranked here by CR Score, from 8 published factors. 6 are open 24/7, 14 open Saturdays and 12 open Sundays, based on posted hours. The median Google rating is 4.6★ across 29 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | NexGen HVAC & Plumbing | 88 | 4.7★ (1,769) | Riverside, 24 mi away | 24/7 | Overall |
| 2 | Attic Projects | 84 | 5.0★ (168) | Rancho Cucamonga, 19 mi away | Sat · Sun · Evenings | — |
| 3 | NexGen HVAC & Plumbing | 82 | 4.8★ (708) | Fontana, 18 mi away | 24/7 | Emergencies |
| 4 | Y&S Attic Insulation | 82 | 5.0★ (18) | San Bernardino, 7 mi away | Sat · Sun · Evenings | — |
| 5 | Alpha Insulation | 82 | 5.0★ (19) | Adelanto, 21 mi away | 24/7 | — |
| 6 | RKM Heating and Air Conditioning | 80 | 4.9★ (1,073) | Riverside, 21 mi away | 24/7 | Most reviews |
| 7 | Ameriwest Home Services | 79 | 5.0★ (203) | Riverside, 25 mi away | Sat | — |
| 8 | NexGen HVAC & Plumbing | 79 | 4.6★ (507) | Ontario, 24 mi away | 24/7 | — |
| 9 | Greencat, Inc. | 76 | 4.9★ (373) | Anaheim, 16 mi away | Sat · Evenings | — |
| 10 | Lee's HVAC & Home Renovations | 74 | 4.6★ (122) | Calabasas, 20 mi away | Sat · Sun · Evenings | — |
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 review volume: 4.7★ from 1,769 Google reviews, the most Google reviews on this list (1,769).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rancho Cucamonga, 19 mi away
Ranked #2 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 Fontana, 18 mi away
Ranked #3 because of its Google rating and availability: 4.8★ from 708 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Bernardino, 7 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Adelanto, 21 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 19 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 21 mi away
Ranked #6 because of its Google rating and review volume: 4.9★ from 1,073 Google reviews, 1,073 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 25 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 203 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 24 mi away
Ranked #8 because of its Google rating and availability: 4.6★ from 507 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Anaheim, 16 mi away
Ranked #9 because of its Google rating and review volume: 4.9★ from 373 Google reviews, 373 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Calabasas, 20 mi away
Ranked #10 because of its Google rating and availability: 4.6★ from 122 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 20 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 22 mi away
Ranked #12 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 23 mi away
Ranked #13 because of its Google rating and trade focus: 3.3★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 22 mi away
Ranked #14 because of its Google rating and trade focus: 2.3★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Fontana, 18 mi away
Ranked #15 because of its Google rating and trade focus: 4.3★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 23 mi away
Ranked #16 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Colton, 12 mi away
Ranked #17 because of its Google rating and availability: 5.0★ from 25 Google reviews, open Sundays until 8 PM.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 17 mi away
Ranked #18 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Victorville, 18 mi away
Ranked #19 because of its Google rating and review volume: 4.6★ from 365 Google reviews, 365 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hesperia, 15 mi away
Ranked #20 because of its Google rating and trade focus: 3.6★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 25 mi away
Ranked #21 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Moreno Valley, 23 mi away
Ranked #22 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ontario, 24 mi away
Ranked #23 because of its Google rating and trade focus: 3.8★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Anaheim, 22 mi away
Ranked #24 because of its Google rating and availability: 3.7★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 17 mi away
Ranked #25 because of its Google rating and trade focus: 3.1★ from 34 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 #29, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Weatherguard Company | 65 | 5.0★ (23) | 19 mi |
| 27 | Bell Roof Co. | 65 | 4.2★ (30) | 13 mi |
| 28 | Green Lite Windows & Doors | 64 | 4.7★ (44) | 23 mi |
| 29 | Concrete Protection Systems West, Inc. | 61 | 5.0★ (5) | 23 mi |
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 |
|---|---|---|
| ALCAL Specialty Contracting Ontario - Home Service Division | 3.0★ (2) | 19 mi |
| All Seasons Insulation, Inc. | 1.0★ (1) | 11 mi |
| All Star Install LLC | 5.0★ (2) | 21 mi |
| american insulation inc | 5.0★ (1) | 16 mi |
| Attic Blow Insulation | 5.0★ (2) | 7 mi |
| AV Painting & Quality Service | 5.0★ (1) | 22 mi |
| Brennan Pat Construction | 5.0★ (1) | In Crestline |
| BTE Insulation | 7 mi | |
| C 2 Insulation & Acoustical | 4.0★ (1) | 21 mi |
| CENTROMERE CONSTRUCTION INC | 3.0★ (2) | 22 mi |
| Fireproofing Cleaning Service | 4.5★ (2) | 21 mi |
| Green Spot Home Solutions | 5.0★ (1) | 23 mi |
| Industrial Furnace & Insulation Inc. | 5.0★ (1) | 23 mi |
| Inter Mountain Insulation | 5.0★ (1) | 25 mi |
| Jose Rodriguez Insulation | 3.0★ (2) | 15 mi |
| LL Insulation Contractors | 1.0★ (1) | 14 mi |
| Pure Eco Inc | 5.0★ (1) | 18 mi |
| San Bernardino Attic Insulation | 9 mi | |
| Thermo Logic Insulation | 4.0★ (1) | 20 mi |
| TruTeam of California: | 5.0★ (1) | 16 mi |
National price ranges in USD, not adjusted for Crestline. 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 29 Crestline 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 Crestline 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 |