Alpine Roofing
“Even the neighbour made a comment on the nice job Alpine Roofing did.”
Best Insulation Contractors in Toronto, ON
15 contractors listed · 12 in Toronto · 3 open 24/7 · 10 open weekends · 13 rated 4.5+
Data verified October 18, 2026
Foam Comfort Inc.
“Masked the entire place so there was no overspray anywhere and they did a great cleanup job after and got everything trimmed and ready for drywall.”
Integrity Roofers
“After noticing a leak in the ceiling I called Shay at Integrity Roofers and they were able to send someone within a few hours.”
JAD Soundproofing
“I'm very happy with the results, I imagine if I wanted even more quiet I would have to do the decoupling/drop ceiling but I would prefer to not do that if i don't have to.”
Everest Insulation
“Insulation in an attic is one of the best value for money things you can do to reduce your costs, burn less fuel, and these guys are really good.”
Eastern Western Construction LTD
“Thank so much EWCLTD for creating and bringing my new space from imagination to reality.”
The 15 contractors listed for Toronto, ON insulate attics, basements, headers and crawl spaces. Details under each one about materials, hours and advertised services are copied from the company's own site; star ratings and comments come from public reviews.
Area overview: Toronto, ON
12 of the 15 contractors we list are based in Toronto; the other 3 serve Toronto from Etobicoke (16 km) and Markham (17 km). The contractors on this page are rated from 4.0 to 5.0 across 1,257 reviews; 7 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (93%), quality (83%) and responsiveness (80%). The topics that come up most in reviews of the contractors on this page are "cleanliness", "estimates" and "price". 3 are open around the clock; 10 are open on Saturdays and 4 on Sundays. The services the contractors on this page list most often on their websites are attic insulation (3), flat roofs (2), home additions (2), roof repairs (2) and roof replacement (2). Domain records put 3 websites of the contractors on this page at ten or more years old; the oldest dates from 2014. 4 offer emergency call-outs; 1 offers financing or payment plans; 9 give free estimates and 1 lists coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
How many listings here have a website?
A website is on file for all 15 contractors here. Look for the materials they install and whether they do attics, basements or both, because plenty of crews specialize in one. Where there is no site, ask the same questions by phone before booking a visit.
Valcast Construction
“From the initial consultation to the final touches, they demonstrated expertise and skill in every aspect of the project.”
Konstruction Group Inc.
“I will definitely recommend them for people looking for a framing/carpentry team!”
Spray City Insulation
“They were on time, the work is very neatly done and they took care to ensure everything was cleaned up when they were finished.”
Flat Roofs Toronto
“It was really impressive to watch them performing their services with honesty and they knew their work and finished the installation work in less than the quoted time.”
Canada National Insulation
“They did the job quickly and did an excellent job cleaning up afterwards.”
Greenvestment Inc. Home Improvement Solutions. Spray Foam
“He gave us very useful advice, and saved us money in the end.”
Quality Roofing Services LTD
“Clean, tidy, showed up every day.”
Exalted Services
“Majid did a great job at explaining all the things that needed fixing.”
Tiltop Roofers
“They did a drone inspection, which I thought was pretty cool, and a visual inspection as well.”
Why these companies made our list
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