118 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ontario: Attic Projects, CR Score 61/100; 5.0★ from 168 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): CURA Termite and Pest Control, posts 24/7 hours; ranked #2 of 118.
Most-reviewed: RighTime Home Services, 3,741 Google reviews at 4.7★, the most of 118 ranked; ranked #16.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
118 Ontario insulation contractors are ranked here by CR Score, from ten published factors. 16 are open 24/7, 84 open Saturdays and 71 open Sundays, based on posted hours. The median Google rating is 4.9★ across 118 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Projects | 61 | 5.0★ (168) | Rancho Cucamonga, 5 mi away | Sat · Sun · Evenings | Overall |
| 2 | CURA Termite and Pest Control | 60 | 4.9★ (859) | Anaheim, 22 mi away | 24/7 | Emergencies |
| 3 | Gopher Patrol | 60 | 4.9★ (182) | Riverside, 15 mi away | 24/7 | — |
| 4 | NexGen HVAC & Plumbing | 60 | 4.7★ (1,769) | Riverside, 24 mi away | 24/7 | — |
| 5 | Attic Projects | 58 | 4.9★ (584) | Orange, 22 mi away | Sat · Sun · Evenings | — |
| 6 | My Insulation Guy | 58 | 4.9★ (155) | Riverside, 14 mi away | Sat · Sun · Evenings | — |
| 7 | SoCal Comfort Shield Insulation | 58 | 5.0★ (25) | Montclair, 3 mi away | Sat · Sun · Evenings | — |
| 8 | NexGen HVAC & Plumbing | 57 | 4.6★ (507) | Ontario | 24/7 | — |
| 9 | Priority Attic Insulation | 57 | 4.6★ (47) | Glendora, 12 mi away | 24/7 | — |
| 10 | Insulation Labs | 57 | 5.0★ (135) | Fullerton, 19 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: 5.0★ from 168 Google reviews, listed on Google as “Insulation contractor”.
Based in Anaheim, 22 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 859 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 15 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 182 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 24 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 1,769 Google reviews, listed on Google as “Insulation contractor”.
Based in Orange, 22 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 584 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 14 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 155 Google reviews, listed on Google as “Insulation contractor”.
Based in Montclair, 3 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based in Ontario
Ranked #8 because of its Google rating and review volume: 4.6★ from 507 Google reviews.
Based in Glendora, 12 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 47 Google reviews, listed on Google as “Insulation contractor”.
Based in Fullerton, 19 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 135 Google reviews, listed on Google as “Insulation contractor”.
Based in Azusa, 16 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 94 Google reviews, listed on Google as “Insulation contractor”.
Based in Fontana, 8 mi away
Ranked #12 because of its Google rating and review volume: 4.8★ from 708 Google reviews.
Based in Chino, 4 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 16 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 203 Google reviews, listed on Google as “Insulation contractor”.
Based in Pomona, 4 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based in Corona, 19 mi away
Ranked #16 because of its Google rating and review volume: 4.7★ from 3,741 Google reviews, the most in Ontario.
Based in San Dimas, 11 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 27 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 14 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Insulation contractor”.
Based in Anaheim, 17 mi away
Ranked #19 because of its Google rating and review volume: 4.7★ from 2,250 Google reviews.
Based in Covina, 13 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based in Ontario
Ranked #21 because of its Google rating and trade focus: 3.3★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based in Ontario
Ranked #22 because of its Google rating and trade focus: 4.8★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based in Placentia, 17 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based in Riverside, 14 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based in Anaheim, 15 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 61 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 118 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 |
|---|---|---|
| ALCAL Specialty Contracting Ontario - Home Service Division | 3.0★ (2) | In Ontario |
| All Star Install LLC | 5.0★ (2) | In Ontario |
| Attic Control | 3.0★ (2) | In Ontario |
| Builders' Insulation | 5.0★ (2) | 14 mi |
| Cali Thermal Insulation | In Ontario | |
| Canyon Insulation Inc | 5.0★ (2) | 14 mi |
| Fireproofing Cleaning Service | 4.5★ (2) | 10 mi |
| Industrial Furnace & Insulation Inc. | 5.0★ (1) | In Ontario |
| Insulation Sources | In Ontario | |
| Jose Rodriguez Insulation | 3.0★ (2) | 15 mi |
| Kiko's insulation corporation | 5.0★ (2) | 11 mi |
| Lone Star | 5.0★ (2) | 11 mi |
| Performance Contracting Inc | 5.0★ (2) | 17 mi |
| QUALITY FOAM | 5.0★ (2) | 17 mi |
| Semper fi Handyman | 2.5★ (2) | 4 mi |
| Sierra Insulation Contractors | In Ontario | |
| Smart Value Insulation | 5.0★ (2) | 20 mi |
| Thermal Energy Products | 3.0★ (2) | 12 mi |
| Thermal Nest Insulation of Anaheim | 5.0★ (2) | 19 mi |
| Vasitos Construction | 5.0★ (2) | 17 mi |
National price ranges in USD, not adjusted for Ontario. 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 118 Ontario 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 Ontario 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 |