Kingston Spray Foam Insulation
“Our house stayed very warm all winter with very minimal heating from three small baseboard heaters.”
Best Insulation Contractors near South Frontenac, ON
None of these contractors is based in South Frontenac; they work from Kingston (33 km) and Glenburnie (14 km).
10 contractors listed · 4 open weekends · 8 rated 4.5+ · 2 show a licence
Data verified October 16, 2026
Step BY Step Roofing
“They were always professional, always there to answer any questions or concerns AND they cleaned up after each day.”
Kingston's Insulating Solutions
“I was kept informed on the work and I was shown before and after pictures of the attic .”
Kingston Roofers
“Came out as soon as they could and didn't try to sell me something I didn't need.”
Aaben Windows & Doors
“One of the panes recently developed a minor issue with condensation between the panes, but they replaced it under warranty at no charge.”
Energy Kingston Exteriors Inc.
“Having used Energy Kingston's services over the past ten years to replace our roof, front and back doors, windows, porch columns, and porch railings, I highly recommend this company!”
The 10 contractors listed for South Frontenac, 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: South Frontenac, ON
9 of the 10 contractors on this page have a rating, from 4.3 to 5.0 across 403 reviews; 2 have 50 or more reviews and 8 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (91%), quality (80%) and value (71%). 4 are open on Saturdays and 1 on Sundays. 2 show a licence on their websites. Domain records put 4 websites of the contractors on this page at ten or more years old; the oldest dates from 1996. 1 offers financing or payment plans; 3 give free estimates; 1 is family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 9 of the contractors on this page; 9 publish a contact page and 8 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.
Will anyone assess the house at no charge?
No charge assessments are advertised by 3 of the 10 contractors on this page. Treat that as a sales visit with a tape measure. A paid energy evaluation is the thorough version, and in some provinces it is also the paperwork that opens the door to a rebate program.
BDK Foam Insulation Inc.
“My wife and I were very pleased with the service from BDK.”
Interprovincial Insulation Inc
“The guys were hard working, easy to work with, very professional and everything was prepped so well (windows and floors covered) that there was no clean up!”
Felix Patry Insulation Ltd
“I will definitely use them again and recommend them to others.”
Insulation Kingston
Why these companies made our list
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