Warner Roofing Inc.
“From the zoom presentation which provided every detail of the new roof…to the install and clean up…… Great Crew!”
Best Insulation Contractors near Newmarket, ON
3 of these contractors are based in Newmarket; the others serve Newmarket from towns including Richmond Hill (21 km), Aurora (6 km) and East Gwillimbury (10 km).
1 open 24/7 · 9 open weekends · all 15 rated 4.5+
Data verified October 19, 2026
T. Simpson Roofing
“When it came time to get a complete new shingling, our trust in their professionalism proved well founded.”
First Choice Roofing
“Extra attention was made to the cleanup and a trailer was used instead of a bin that other roofers used at my neighbour's house which sunk into his driveway.”
Pro Insulation Contracting
“They are very professional, always deliver the work within the agreed time.”
Guycan Ltd
“I continue to be impressed with Randy, Juliette and Jason with respect to their expertise and dedication in bringing innovative solutions to their customers with a high level of professionalism.”
Confirmed Contracting & Insulation
“Very professional, fair price and high quality service I highly recommend them to everyone.”
The 15 contractors listed for Newmarket, 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: Newmarket, ON
The 15 contractors on this page are rated from 4.5 to 5.0 across 1,038 reviews; 8 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise professionalism (95%), responsiveness (81%) and quality (79%). The topics that come up most in reviews of the contractors on this page are "price", "cleanliness" and "efficient". 1 is open around the clock; 9 are open on Saturdays and 4 on Sundays. The services the contractors on this page list most often on their websites are skylights (4), attic insulation (3), attic insulation removal (2), flat roofing (2) and metal roofing (2). 5 have ten or more years of experience, the longest 24 years. 1 offers emergency call-outs; 3 offer financing or payment plans; 10 give free estimates; 3 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for all 15 of the contractors on this page; all 15 publish a contact page; 12 list a public email and 2 take bookings online. 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.
Are all of these firms based in Newmarket?
No. 3 have an address in Newmarket and the rest come from other towns within 25 km. Rig and hose mean these crews cover a wide area from one yard. Ask whether your address falls inside the zone they work without a surcharge.
Free Attic
“Not only did they meet my tight timelines for this work, they constantly communicated throughout the process so that all of my questions were answered and I knew what to expect at every step.”
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The Next Level Consulting
“He was prompt and professional, explained everything and took care of all aspects of filing Greener home's application”
Celluloseman
“Based on my experience they know their stuff, are very reasonable to deal with, are very honest and do an exceptional job.”
Dilmar Roofing
“Weather was not looking good but they were fast and efficient on the job and cleaned up afterwards.”
Jay Carter Roofing & Sheet Metal
“The courtesy of laying down tarps and running a magnet around to pickup lose nails was appreciated.”
Space Insulation
“It's great job and thank you space insulation for coming on time”
Spray Foam Gta/Right Choice Spray Foam
“This company had a quick response and completed the work very efficiently.”
Reid's Roofing Ltd.
“They very quick and thorough in getting the job done, they even put in some extra effort to fix up some problem areas around the eavestroughs.”
Akrete
“He provided good advice and was very reasonable with the price.”
Why these companies made our list
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