Aaben Windows & Doors
“I had a tricky job for them and they were always patient, informative and friendly.”
Best Insulation Contractors in Kingston, ON
11 contractors listed · 6 in Kingston · 5 open weekends · 9 rated 4.5+ · 2 show a licence
Data verified October 16, 2026
Energy Kingston Exteriors Inc.
“I had my basement window replaced by Energy Kingston and we are very pleased with the window and good clean work they did.”
BDK Foam Insulation Inc.
“The team arrived on time and did even more than promised to do a very professional job and fantastic cleanup!”
Interprovincial Insulation Inc
“I really appreciated that they periodically checked with me throughout the job to make sure I was happy with what they were doing.”
Felix Patry Insulation Ltd
“I received a very prompt and professional service, at very competitive prices.”
Insulation Kingston
The 11 contractors listed for Kingston, 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: Kingston, ON
6 of the 11 contractors we list are based in Kingston; the other 5 serve Kingston from Wolfe Island (12 km) and Glenburnie (19 km). 10 of the contractors on this page have a rating, from 4.3 to 5.0 across 435 reviews; 2 have 50 or more reviews and 9 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (92%), quality (78%) and value (69%). 5 are open on Saturdays and 1 on Sundays. 2 show a licence on their websites. 4 have ten or more years of experience, the longest 30 years. 2 offer financing or payment plans; 4 give free estimates; 1 is family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 10 of the contractors on this page; 10 publish a contact page and 9 list a public email. 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 Kingston?
No. 6 have an address in Kingston and the rest come from other towns within 20 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.
Kingston Spray Foam Insulation
“Very conscientious and thorough with the work done, at a reasonable price.”
Reitzel Bros. Insulation
“Job was done ahead of schedule and even asked if I wanted help moving my stuff back into place.”
Step BY Step Roofing
“Jaicob and his crew are unbelievably fast and efficient, extremely competitive and transparent in regards to services and pricing, and above all else, are just a group of courteous, pleasant guys.”
Kingston's Insulating Solutions
“Manny and his crew did a great job, very courteous, were careful not to cause any damage and did a great job cleaning up.”
Kingston Roofers
“Ryan took time to explain to us what the problem was and how he was going to repair the roof.”
Why these companies made our list
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