91/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 135 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 135 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
Best Insulation Contractors in Markham, ON (2026)
180 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Markham: Celluloseman Inc., CR Score 91/100; 5.0★ from 135 Google reviews; open 7 days a week.
- 2
Best for emergencies (open 24/7): Superior Care Home Services Inc., posts 24/7 hours; ranked #2 of 180.
- 16
Most-reviewed: TruTech Pest & Wildlife Control, 532 Google reviews at 5.0★, the most of 180 ranked; ranked #16.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
180 Markham insulation contractors are ranked here by CR Score, from 8 published factors. 19 are open 24/7, 117 open Saturdays and 65 open Sundays, based on posted hours. The median Google rating is 4.9★ across 180 rated businesses.
Top 10 insulation contractors in Markham at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Celluloseman Inc. | 91 | 5.0★ (135) | Markham | Sat · Sun · Evenings | Overall |
| 2 | Superior Care Home Services Inc. | 89 | 5.0★ (266) | Markham | 24/7 | Emergencies |
| 3 | Eco-therma Inc. | 88 | 5.0★ (71) | Toronto, 27 km away | 24/7 | — |
| 4 | Confirmed Attics & Insulation | 87 | 4.9★ (265) | Markham | Sat | — |
| 5 | Logik Roofing & Insulation Oshawa | 87 | 4.9★ (400) | Oshawa, 31 km away | Sat · Sun · Evenings | — |
| 6 | Solidcare Home Improvements | 87 | 4.8★ (207) | Markham | 24/7 | — |
| 7 | Mas Air Home Comfort | 87 | 5.0★ (96) | Mississauga, 39 km away | 24/7 | — |
| 8 | Pro Insulation Contracting | 86 | 4.9★ (145) | Markham | Sat | — |
| 9 | Space insulation inc. | 86 | 5.0★ (214) | Richmond Hill, 14 km away | Sat | — |
| 10 | NDS Insulation Inc. | 86 | 4.9★ (76) | North York, 12 km away | Sat · Sun · Evenings | — |
The 180 best insulation contractors in Markham, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Markham
89/100CR ScoreRanked #2 because of its Google rating and availability: 5.0★ from 266 Google reviews, open 24/7.
- 5.0★ from 266 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 185 Riviera Dr Unit 9, Markham, ON L3R 5J6
Based in Toronto, 27 km away
88/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 71 Google reviews, open 24/7.
- 5.0★ from 71 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 325 Front St W C-Office 2085A, Toronto, ON M5V 2Y1
Based in Markham
87/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 265 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 265 Google reviews
- Hours
- Mon–Sat 9 AM–5 PM · Sun closed
- Address
- 2600 John St. #208, Markham, ON L3R 3W3
Based in Oshawa, 31 km away
87/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 400 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 400 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat–Sun 9 AM–6 PM
- Address
- 1333 Boundary Rd #33, Oshawa, ON L1J 6Z7
Based in Markham
87/100CR ScoreRanked #6 because of its Google rating and availability: 4.8★ from 207 Google reviews, open 24/7.
- 4.8★ from 207 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 16 Esna Park Dr UNIT 6, Markham, ON L3R 5X1
Based in Mississauga, 39 km away
87/100CR ScoreRanked #7 because of its Google rating and availability: 5.0★ from 96 Google reviews, open 24/7.
- 5.0★ from 96 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6730 Davand Dr #8, Mississauga, ON L5T 2K8
Based in Markham
86/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 145 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 145 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 10 AM–4 PM · Sun closed
- Address
- 185 Riviera Dr Unit 11, Markham, ON L3R 5M1
Based in Richmond Hill, 14 km away
86/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 214 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 214 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 9 AM–5 PM · Sun closed
- Address
- 10660 Yonge St, Richmond Hill, ON L4C 3C9
Based in North York, 12 km away
86/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 76 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 76 Google reviews
- Hours
- Mon–Fri 12 PM–7 PM · Sat–Sun 12 PM–5 PM
- Address
- 250 Consumers Rd #701, North York, ON M2J 4V6
Based in Newmarket, 24 km away
85/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 132 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 132 Google reviews
- Hours
- Mon–Fri 7:30 AM–9 PM · Sat–Sun 9 AM–9 PM
- Address
- 16700 Bayview Ave #214, Newmarket, ON L3X 1W1
#12 Free Attic
Based in Richmond Hill, 14 km away
85/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 187 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 187 Google reviews
- Hours
- Mon–Sat 9 AM–5 PM · Sun closed
- Address
- 10271 Yonge St #336, Richmond Hill, ON L4C 3B5
Based in Toronto, 20 km away
85/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 82 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 82 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
- Address
- 1110 Finch Ave W #30, Toronto, ON M3J 2T2
#14 Spray Foam Kings
Based in Aurora, 21 km away
85/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 64 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 64 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
- Address
- 120 Metcalfe St, Aurora, ON L4G 1E8
Based in North York, 5 km away
84/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 17 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 17 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat–Sun 10 AM–6 PM
Based in Mississauga, 40 km away
84/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 532 Google reviews, the most Google reviews on this list (532).
- 5.0★ from 532 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 9 AM–5 PM · Sun closed
- Address
- 5315 Tomken Rd #10, Mississauga, ON L4W 1P5
#17 Go Green
Based in Brampton, 30 km away
84/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 107 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 107 Google reviews
- Hours
- Mon–Sun 7 AM–9 PM
- Address
- 7600 Hwy 27 Unit 5B, Woodbridge, ON L4H 0P8
Based in Burlington, 21 km away
83/100CR ScoreRanked #18 because of its Google rating and availability: 4.8★ from 224 Google reviews, open 24/7.
- 4.8★ from 224 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Scarborough, 9 km away
83/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 15 Google reviews
- Hours
- Mon–Fri 9 AM–10 PM · Sat–Sun 9 AM–9 PM
- Address
- 10 Milner Business Ct #300, Scarborough, ON M1B 3C6
#20 DJM Spray Foam
Based in Oshawa, 31 km away
83/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 52 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 52 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 729 Fernhill Blvd, Oshawa, ON L1J 5K2
Based in Vaughan, 18 km away
83/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 90 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 90 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 9 AM–3 PM · Sun closed
- Address
- 0A6, 8707 Dufferin St Suite10, Vaughan, ON
Based in Toronto, 13 km away
83/100CR ScoreRanked #22 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
- 5.0★ from 3 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 43 Wallingford Rd, Toronto, ON M3A 2V2
Based in East Gwillimbury, 32 km away
83/100CR ScoreRanked #23 because of its Google rating and availability: 5.0★ from 14 Google reviews, open 24/7.
- 5.0★ from 14 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 20095 McCowan Rd, Mount Albert, ON L0G 1M0
Based in Toronto, 15 km away
83/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 17 Google reviews
- Hours
- Mon–Fri 9 AM–10 PM · Sat–Sun 9 AM–9 PM
- Address
- North American Centre, 5700 Yonge St Suite # 200, Toronto, ON M2M 4K2
Based in Vaughan, 20 km away
83/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.8★ from 31 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 31 Google reviews
- Hours
- Mon–Fri 9 AM–10 PM · Sat 9 AM–9 PM · Sun 9:30 AM–8:30 PM
- Address
- 10 Great Gulf Dr Suite 214, Vaughan, ON L4K 0K7
Insulation contractors ranked #26 to #50
#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 180 ranked insulation contractors here; the rest are on their profiles.
Also serving Markham
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 |
|---|---|---|
| Airking Heating and Cooling | 4.8★ (23) | In Markham |
| Comfy Home Services | 4.2★ (42) | In Markham |
| Commercial Drywall Supply (CDS Drywall) | 4.6★ (59) | In Markham |
| Constant Home Comfort | 4.8★ (583) | In Markham |
| Eco Insulation (York) | 5.0★ (1) | In Markham |
| Eco Star Home Services Co. | 4.7★ (490) | In Markham |
| Ecogreen Insulation | 1.0★ (1) | In Markham |
| Exalted Services | 4.9★ (100) | In Markham |
| For Saving Home Service | HVAC | AC | Furance Services | 4.8★ (256) | In Markham |
| High Life Heating & AC | 3.8★ (167) | In Markham |
| I.N. FOAM INSULATION SERVICES INC | 5.0★ (2) | 5 km |
| ICare Home Comfort | 4.9★ (836) | In Markham |
| METRO INSULATION INC. | In Markham | |
| Star Energy Home Comfort | 4.1★ (94) | In Markham |
| Super Green HVAC | 4.9★ (91) | In Markham |
| Superb Markham Spray Foam Insulation | 5.0★ (2) | In Markham |
| White & Greer Co Ltd | 5.0★ (2) | In Markham |
| Whole Home Savings | 2.5★ (2) | 6 km |
| World Class Work Roofing and Insulation | 5.0★ (2) | 5 km |
| Xpertinsulation | In Markham |
How much do insulation contractors cost in Markham?
US national ranges converted to CAD, not adjusted for Markham. 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 |
How we ranked Markham insulation contractors
We scored 180 Markham 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 Markham 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 |
Insulation contractors in Markham: frequently asked questions
Who is the best insulation contractor in Markham?
By CR Score, the highest-ranked insulation contractor in Markham, ON is Celluloseman Inc. with a CR Score of 91/100. It has 5.0★ from 135 Google reviews. It is open 7 days a week. Superior Care Home Services Inc. (#2) and Eco-therma Inc. (#3) follow. We ranked 180 insulation contractors on 8 factors, last updated October 22, 2026.
How many insulation contractors are there in Markham?
ContractorsRanked ranks 180 insulation contractors serving Markham, ON. 9 of them are based in Markham; the rest serve it from nearby towns. Another 20 within 40 km are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in Markham are open 24/7?
19 ranked insulation contractors in Markham post 24/7 hours. The highest-ranked are Superior Care Home Services Inc. (#2), Eco-therma Inc. (#3) and Solidcare Home Improvements (#6). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in Markham work on weekends?
117 of 180 ranked insulation contractors post Saturday hours and 65 post Sunday hours. The highest-ranked open Saturdays are Celluloseman Inc. (#1), Superior Care Home Services Inc. (#2) and Eco-therma Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Markham?
Attic insulation typically costs CA$2,390 to CA$3,510, with CA$2,950 typical (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)). This is a national range, not adjusted for Markham. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Markham insulation contractors have?
The median Google rating among 180 rated insulation contractors in Markham is 4.9★, with a median of 16 reviews. TruTech Pest & Wildlife Control has the most, 532 reviews, and ranks #16. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank insulation contractors?
Each insulation contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside Markham count in this ranking?
Yes, if they are within 40 km of the Markham city centre, our service radius for insulation contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for Markham
- October 2026: CR Scores recalculated for 180 insulation contractors serving Markham.
More insulation contractors and Markham pages
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