Montenegro Aluminum
“Nathan and his crew just completed a fantastic job, removing rotten wooden frames around our windows n replacing them with aluminum capping.”
Best Insulation Contractors in Mississauga, ON
17 contractors listed · all 17 in Mississauga · 1 open 24/7 · 12 open weekends · 14 rated 4.5+
Data verified October 18, 2026
Home Star Roofing LTD
“Replaced our roof shingles in one day, left the place very clean and all that for a super competitive price.”
Mas Air Home Comfort
“I recently installed heating, air conditioning, a water heater, and a water softener, all thanks to the recommendations from sales representative Shawn.”
Foam It
“FoamIt accommodated my schedule and complete the work on target and they made the process seamless.”
Real Blue Roofing Services Inc
“They did a great cleanup job around the entire property when they were finished.”
Four Seasons Insulation Inc.
“Service was fast and reliable, I would recommend anyone to Four seasons insulation.”
The 17 contractors listed for Mississauga, 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: Mississauga, ON
All 17 contractors we list here are in Mississauga itself. 16 of the contractors on this page have a rating, from 4.0 to 5.0 across 972 reviews; 7 have 50 or more reviews and 14 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (94%), quality (89%) and responsiveness (81%). 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; 12 are open on Saturdays and 5 on Sundays. The services the contractors on this page list most often on their websites are insulation removal (4), attic insulation (3), spray foam insulation (3) and eavestrough (2). 3 show a licence on their websites. 4 have ten or more years of experience, the longest 25 years. 2 offer emergency call-outs; 2 offer financing or payment plans; 8 give free estimates; 5 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for 16 of the contractors on this page; 15 publish a contact page and 12 list a public email. We count these figures across the contractors on this page; 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 16 of the 17 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.
Cherry and Clark Roofing Company
“Their admin team was responsive and courteous and provided all of the necessary documentation we needed for our insurance claim as well.”
Northstar Spray Foam and Insulation Inc
“Their quote was competitive and their team was very responsive to any questions or concerns I had.”
Foamworks Insulation
“I highly recommend FoamWorks as the process went smoothly from start to finish.”
Attic Insulation Toronto
“Price was very reasonable and the fact that they have a credit card machine with them makes payment a breeze.”
Brunco Insulation Ltd
Delta Coatings & Sealants Inc.
Target Drywall
“Good communication, courteous, punctual, quality work and affordable.”
Davison Insulation Systems Ltd.
Insulation Sauga
“The house seems cooler during the hot days and when winter rolled in, it seemed much warmer.”
Spray Solutions Inc.
“This has given our home a new look and protects our home like a protective insulator in the winter while keeping it cool during the hot summer months.”
Spectrum Drywall & General Contracting Inc.
Why these companies made our list
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