Best Insulation Contractors near Strathroy, ON
None of these contractors is based in Strathroy; they work from towns including London, Mount Brydges and St. Thomas.
24 contractors listed · 10 open weekends · 15 rated 4.5+
Data verified October 18, 2026
Canadian Energy Savers
“These guys are great and do a great job”
Seal-It Insulation
Advanced Technical Insulation Ltd.
Arctic Attics
Himalaya Group
“The team was very speedy and did great work of replacing our roof and fixing some issues along the way.”
The 24 contractors listed for Strathroy, 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: Strathroy, ON
22 of the 24 contractors on this page have a rating, from 4.0 to 5.0 across 740 reviews; 6 have 50 or more reviews and 15 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (93%), quality (84%) and responsiveness (76%). The topics that come up most in reviews of the contractors on this page are "price", "estimates" and "cleanliness". 9 are open on Saturdays and 7 on Sundays. 1 lists staff certifications (GAF). 10 have ten or more years of experience, the longest 29 years. 1 offers emergency call-outs; 3 offer financing or payment plans; 11 give free estimates; 2 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for 23 of the contractors on this page; 18 publish a contact page; 21 list a public email and 2 take bookings online. 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 23 of the 24 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.
Net Zero Insulation Inc
“They let us know step by step what they were doing, best practices and any problems they ran into, how they were going to fix them and did beyond what we expected.”
1st Choice Home Solutions
“They were very professional and have really helped to make my home look and feel really lovely and cozy”
Davidoff Roofing (London) Ltd
“They even told us we only needed the sides done, which shows to me they won't rip you off for the money and they care.”
Accell Roofing Inc
“We had a leak and John repaired it until they could replace the roof.”
Aok Roofing Inc.
“They not completed the scope of the project but went above and beyond by fixing other minor issues without extra charge.”
Legacy Flat Roofing & Sheet Metal (Call US Here)
“Did exactly what they said they were going to, on time at the price they promised.”
Ritchie's Insulation & General Contracting
“I got the PU foam installed at my place and the two workers who came by to perform the job showed up on time, and were courteous and respectful.”
Murray Shaw Roofing
“They were careful not to disrupt too much of the older existing cedar and patch in new ones around the 2 skylights they did replace.”
Prime Air & Water
“Ali and Parm were very courteous and professional installing our hepafilter and on demand hot water as well as a doorbell and thermostat.”
Polar Energy Systems
“Chris was great to deal with and kept me informed during the insulation process.”
Skylar Group Ltd.
“While he was here he notice some of my siding and facia were loose and fixed at no charge !!!!”
London Star Drywall
“I would highly recommend this company to any new home builder.”
Therm-o-Comfort Co Ltd
Roofing Services London
“Great restoration and repair job -- definitely recommend!”
Belform Insulation
Janzen Insulation
“Great work and came back when I had some additional work needed.”
Canadian Spray Foam Systems Ltd.
“Mike and Bryan, did a wonderful job on my basement (Spray foam).”
Bay Insulation Systems
Why these companies made our list
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