50 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Fontana: NexGen HVAC & Plumbing, CR Score 89/100; 4.7★ from 1,769 Google reviews; open 24/7.
Best for emergencies (open 24/7): Gopher Patrol, posts 24/7 hours; ranked #2 of 50.
Most-reviewed: RighTime Home Services, 3,741 Google reviews at 4.7★, the most of 50 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
50 Fontana insulation contractors are ranked here by CR Score, from 8 published factors. 11 are open 24/7, 32 open Saturdays and 27 open Sundays, based on posted hours. The median Google rating is 4.8★ across 50 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | NexGen HVAC & Plumbing | 89 | 4.7★ (1,769) | Riverside, 17 mi away | 24/7 | Overall |
| 2 | Gopher Patrol | 87 | 4.9★ (182) | Riverside, 14 mi away | 24/7 | Emergencies |
| 3 | Attic Projects | 86 | 5.0★ (168) | Rancho Cucamonga, 8 mi away | Sat · Sun · Evenings | — |
| 4 | NexGen HVAC & Plumbing | 86 | 4.8★ (708) | Fontana | 24/7 | — |
| 5 | My Insulation Guy | 84 | 4.9★ (155) | Riverside, 13 mi away | Sat · Sun · Evenings | — |
| 6 | RighTime Home Services | 83 | 4.7★ (3,741) | Corona, 19 mi away | 24/7 | Most reviews |
| 7 | Ameriwest Home Services | 82 | 5.0★ (203) | Riverside, 13 mi away | Sat | — |
| 8 | Attic Advisor | 82 | 5.0★ (37) | Riverside, 14 mi away | Sat · Sun · Evenings | — |
| 9 | Y&S Attic Insulation | 81 | 5.0★ (18) | San Bernardino, 9 mi away | Sat · Sun · Evenings | — |
| 10 | NexGen HVAC & Plumbing | 81 | 4.6★ (507) | Ontario, 12 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: 4.7★ from 1,769 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 14 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 182 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rancho Cucamonga, 8 mi away
Ranked #3 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
Ranked #4 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 Riverside, 13 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 155 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Corona, 19 mi away
Ranked #6 because of its Google rating and review volume: 4.7★ from 3,741 Google reviews, the most Google reviews on this list (3,741).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 13 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 Riverside, 14 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Bernardino, 9 mi away
Ranked #9 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 Ontario, 12 mi away
Ranked #10 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 Riverside, 13 mi away
Ranked #11 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 Montclair, 15 mi away
Ranked #12 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 Riverside, 14 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Corona, 17 mi away
Ranked #14 because of its Google rating and availability: 4.9★ from 191 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Glendora, 24 mi away
Ranked #15 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 Chino, 17 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Pomona, 17 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Dimas, 23 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 Anaheim, 4 mi away
Ranked #19 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 Ontario, 7 mi away
Ranked #20 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 Anaheim, 24 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 61 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Riverside, 10 mi away
Ranked #22 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 Fontana
Ranked #23 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, 10 mi away
Ranked #24 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, 10 mi away
Ranked #25 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.
National price ranges in USD, not adjusted for Fontana. 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 50 Fontana 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 Fontana 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 |