J Squared Roofing
“As busy as they are, Andrew came early Thursday morning and fixed the leak.”
Best Insulation Contractors in Belleville, ON
10 contractors listed · 4 in Belleville · 2 open 24/7 · 3 open weekends · 9 rated 4.5+
Data verified October 21, 2026
Bossline Spray Foam Insulation
“They took the time to explain the process, answered all our questions and made sure we were comfortable before getting started.”
Reid's Insulating
“When it came to the install we were given a time of arrival which they followed.”
Zach Adams Drywall & Taping
“I would very highly recommend Zack Adams Drywall & Taping to anyone looking for someone to do your drywall work.”
Trade-Rep Roofing & Exteriors
“Explained everything to me and showed me all the issues we have on the roof to be addressed at a later date.”
Strictly Roofing
“Great guys, amazing job, would highly recommend them if you're looking for a company that takes pride in their work.”
The 10 contractors listed for Belleville, 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: Belleville, ON
4 of the 10 contractors we list are based in Belleville; the other 6 serve Belleville from towns including Quinte West (15 km), Foxboro (9 km) and Frankford (17 km). The contractors on this page are rated from 3.7 to 5.0 across 329 reviews; 3 have 50 or more reviews and 9 are rated 4.5 or higher. The topics that come up most in reviews of the contractors on this page are "price", "communication" and "estimates". 2 are open around the clock and 3 are open on weekends. 1 shows a licence on its website. Domain records put 2 websites of the contractors on this page at ten or more years old; the oldest dates from 2006. 2 offer emergency call-outs; 1 offers financing or payment plans; 6 give free estimates; 1 is family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 8 of the contractors on this page; 7 publish a contact page; 5 list a public email and 1 takes 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 Belleville?
No. 4 have an address in Belleville 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.
C&K Fibertech Ltd
“They showed up on time, were great guys, asked questions when needed for some extra detailed areas, and cleaned up nicely.”
Canadian Shield Spray Foam
“Extra care was taken to cover and protect our new furnace, duct work, hydro panel, lights, doors and floor so no overspray got on them.”
Darran Green Sandblasting and Painting
“I had my BBQ grates sandblasted by Darren Green Sandblasting in Shannonville, and I couldn't be happier with the results.”
Belleville Insulation
“They were in and out efficiently and the work looks exactly as I hoped it would.”
Why these companies made our list
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