119 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in East Gwillimbury: Celluloseman Inc., CR Score 63/100; 5.0★ from 135 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Frank's Spray Foam Insulation Inc, posts 24/7 hours; ranked #4 of 119.
Most-reviewed: Ainger Group Roofing and Exteriors, 476 Google reviews at 4.9★, the most of 119 ranked; ranked #23.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
119 East Gwillimbury insulation contractors are ranked here by CR Score, from ten published factors. 16 are open 24/7, 79 open Saturdays and 46 open Sundays, based on posted hours. The median Google rating is 4.9★ across 119 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Celluloseman Inc. | 63 | 5.0★ (135) | Markham, 11 km away | Sat · Sun · Evenings | Overall |
| 2 | Insulation Newmarket - Jarrah Contracting Services | 62 | 4.8★ (132) | Newmarket, 7 km away | Sat · Sun · Evenings | — |
| 3 | J&J Inc | 61 | 4.9★ (152) | East Gwillimbury | Evenings | — |
| 4 | Frank's Spray Foam Insulation Inc | 61 | 5.0★ (14) | East Gwillimbury | 24/7 | Emergencies |
| 5 | Spray Foam Kings | 60 | 4.9★ (64) | Aurora, 12 km away | Sat · Sun · Evenings | — |
| 6 | Space insulation inc. | 60 | 5.0★ (214) | Richmond Hill, 24 km away | Sat | — |
| 7 | Fine Finish Wall Systems | 60 | 5.0★ (45) | East Gwillimbury | Sat | — |
| 8 | Spray Foam GTA/Right Choice Spray Foam | 60 | 4.9★ (44) | East Gwillimbury | Sat · Evenings | — |
| 9 | Free Attic | 59 | 5.0★ (187) | Richmond Hill, 25 km away | Sat | — |
| 10 | Gorilla Insulation- Spray Foam and Drywall | 59 | 5.0★ (22) | East Gwillimbury | Sat · Evenings | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 135 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Newmarket, 7 km away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 132 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury
Ranked #3 because of its Google rating and trade focus: 4.9★ from 152 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury
Ranked #4 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aurora, 12 km away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 64 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond Hill, 24 km away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 214 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury
Ranked #7 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury
Ranked #8 because of its Google rating and trade focus: 4.9★ from 44 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond Hill, 25 km away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 187 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury
Ranked #10 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Markham, 31 km away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 265 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aurora, 12 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Markham, 31 km away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 145 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Newmarket, 5 km away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 62 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brampton, 38 km away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 107 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barrie, 32 km away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Vaughan, 30 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 90 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barrie, 9 km away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury
Ranked #19 because of its Google rating and trade focus: 4.3★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Toronto, 37 km away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 82 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Markham, 31 km away
Ranked #21 because of its Google rating and review volume: 5.0★ from 266 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North York, 38 km away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 76 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barrie, 38 km away
Ranked #23 because of its Google rating and review volume: 4.9★ from 476 Google reviews, the most in East Gwillimbury.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barrie, 39 km away
Ranked #24 because of its Google rating and trade focus: 4.6★ from 36 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North York, 25 km away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#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 119 ranked insulation contractors here; the rest are on their profiles.
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.
US national ranges converted to CAD, not adjusted for East Gwillimbury. 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 119 East Gwillimbury 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 East Gwillimbury 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 |