10 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Greater Sudbury: Blouin Brothers Insulation, CR Score 86/100; 4.3★ from 39 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): CASPI SERVICE GROUP of Greater Sudbury/Manitoulin/Algoma, posts 24/7 hours; ranked #2 of 10.
Most-reviewed: Polar Bear Spray Foam Inc, 49 Google reviews at 5.0★, the most of 10 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 Greater Sudbury insulation contractors are ranked here by CR Score, from 8 published factors. 2 are open 24/7, 3 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.2★ across 10 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Blouin Brothers Insulation | 86 | 4.3★ (39) | Greater Sudbury | Sat · Sun · Evenings | Overall |
| 2 | CASPI SERVICE GROUP of Greater Sudbury/Manitoulin/Algoma | 84 | 5.0★ (33) | Greater Sudbury | 24/7 | Emergencies |
| 3 | Polar Bear Spray Foam Inc | 82 | 5.0★ (49) | Greater Sudbury | — | Most reviews |
| 4 | Thermotek Insulations | 77 | 3.8★ (5) | Greater Sudbury | — | — |
| 5 | Randy McMahon Insulation | 76 | 4.4★ (5) | Greater Sudbury | — | — |
| 6 | T&T Insulation | 74 | 4.6★ (10) | Greater Sudbury | — | — |
| 7 | Furoy Insulation | 74 | 3.7★ (18) | Greater Sudbury | — | — |
| 8 | At Best Roofing Solutions & Repairs | 72 | 3.0★ (4) | Greater Sudbury | 24/7 | — |
| 9 | Continental Insulation | 71 | 4.1★ (9) | Lively, 11 km away | — | — |
| 10 | Eco Insulation Sudbury | 68 | 3.7★ (9) | Lively, 14 km away | — | — |
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 trade focus: 4.3★ from 39 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Greater Sudbury
Ranked #2 because of its Google rating and availability: 5.0★ from 33 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Greater Sudbury
Ranked #3 because of its Google rating and review volume: 5.0★ from 49 Google reviews, the most Google reviews on this list (49).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Greater Sudbury
Ranked #4 because of its Google rating and trade focus: 3.8★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Greater Sudbury
Ranked #5 because of its Google rating and trade focus: 4.4★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Greater Sudbury
Ranked #6 because of its Google rating and trade focus: 4.6★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Greater Sudbury
Ranked #7 because of its Google rating and trade focus: 3.7★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Greater Sudbury
Ranked #8 because of its Google rating and availability: 3.0★ from 4 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lively, 11 km away
Ranked #9 because of its Google rating and trade focus: 4.1★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lively, 14 km away
Ranked #10 because of its Google rating and trade focus: 3.7★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
20 more insulation contractors within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| "Aaron's renovation | 5.0★ (2) | In Greater Sudbury |
| All Seasons Insulation | In Greater Sudbury | |
| Aluma Systems (Industrial Services) | 10 km | |
| Barné Building and Construction Inc. | 3.3★ (7) | In Greater Sudbury |
| Borts HVAC | 4.8★ (237) | In Greater Sudbury |
| Bourdon and Sons Windows & Doors -Siding-Sudbury | 4.7★ (44) | In Greater Sudbury |
| Daro Vinyl Products | 4.3★ (48) | In Greater Sudbury |
| DLC Enterprises - Sudbury | 4.3★ (4) | In Greater Sudbury |
| EcoTech Windows & Doors - Greater Sudbury | 4.8★ (194) | In Greater Sudbury |
| EMCO Sudbury | 4.5★ (20) | In Greater Sudbury |
| Fibron Inc | In Greater Sudbury | |
| Keep Dry Foundation Contractors - Snow removal services | 5.0★ (4) | In Greater Sudbury |
| Kozeyah Interiors & Drywall | 4.0★ (4) | In Greater Sudbury |
| LB's Exteriors Inc. | 4.5★ (40) | In Greater Sudbury |
| M Champagne Siding Ltd | 4.6★ (68) | In Greater Sudbury |
| MTR Construction | 3.0★ (1) | In Greater Sudbury |
| Over the Top Roofing | 3.7★ (6) | In Greater Sudbury |
| Patrick Roofing (Northern) Ltd | 3.5★ (20) | In Greater Sudbury |
| RONA+ Sudbury (North) | 3.7★ (1,121) | In Greater Sudbury |
| TML Supply Company | 4.1★ (18) | In Greater Sudbury |
US national ranges converted to CAD, not adjusted for Greater Sudbury. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | CA$2,390 | CA$2,950 | CA$3,510 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 10 Greater Sudbury 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 Greater Sudbury 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 |