14 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Corunna: Canadian Industrial Specialties Ltd, CR Score 81/100; 3.7★ from 7 Google reviews.
Most-reviewed: Attic Insulation & Ventilation Pro's, 117 Google reviews at 4.9★, the most of 14 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
14 Corunna insulation contractors are ranked here by CR Score, from 8 published factors. 2 open Saturdays, based on posted hours. The median Google rating is 4.7★ across 14 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Canadian Industrial Specialties Ltd | 81 | 3.7★ (7) | Sarnia, 10 km away | — | Overall |
| 2 | Foam All Spray Insulation and Concrete Lifting | 79 | 5.0★ (101) | Port Huron, 13 km away | — | — |
| 3 | Insultek Inc | 79 | 5.0★ (3) | Sarnia, 8 km away | — | — |
| 4 | Attic Insulation & Ventilation Pro's | 79 | 4.9★ (117) | Clinton Township, 39 km away | — | Most reviews |
| 5 | Integrity Insulation | 78 | 4.8★ (20) | Sarnia, 10 km away | — | — |
| 6 | Insulation Plus LLC | 77 | 4.7★ (13) | Port Huron, 8 km away | — | — |
| 7 | Spray Foam International | 76 | 4.9★ (9) | Port Huron, 9 km away | — | — |
| 8 | Precision Roofing and Construction | 76 | 4.6★ (35) | Port Huron, 12 km away | Sat | — |
| 9 | B & D Insulation Inc | 74 | 4.2★ (6) | Sarnia, 10 km away | — | — |
| 10 | Eco Insulation | 74 | 4.2★ (5) | Sarnia, 10 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: 3.7★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Port Huron, 13 km away
Ranked #2 because of its Google rating and review volume: 5.0★ from 101 Google reviews, 101 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 8 km away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Clinton Township, 39 km away
Ranked #4 because of its Google rating and review volume: 4.9★ from 117 Google reviews, the most Google reviews on this list (117).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 10 km away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Huron, 8 km away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Huron, 9 km away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Huron, 12 km away
Ranked #8 because of its Google rating and review volume: 4.6★ from 35 Google reviews, 35 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 10 km away
Ranked #9 because of its Google rating and trade focus: 4.2★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 10 km away
Ranked #10 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 Essex, 33 km away
Ranked #11 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 8 km away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 9 Google reviews, listed on Google as “Scaffolding rental service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 8 km away
Ranked #13 because of its Google rating and trade focus: 4.0★ from 7 Google reviews, listed on Google as “Scaffolding rental service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 9 km away
Ranked #14 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Industrial consultant”.
Based on 6 of 8 factors; credentials and recency not yet collected.
US national ranges converted to CAD, not adjusted for Corunna. 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 14 Corunna 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 Corunna 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 |