Wilson's Roofing
“They were communicative, punctual and respectful - showed up on time, cleaned up after themselves and did such a good job on our roof.”
Best Insulation Contractors in Oshawa, ON
15 contractors listed · 10 in Oshawa · 2 open 24/7 · 10 open weekends · 13 rated 4.5+
Data verified October 19, 2026
Logik Roofing & Insulation Oshawa
“They explained everything clearly, treated my home with care, and cleaned up thoroughly afterward.”
Over the Top
“We were provided a quote right away, and Chris got right back to us with any questions or concerns we had.”
Dryhome Roofing
“From advising me on the best roof selections, to working tirelessly on my roof itself, they were phenomenal!”
Turnbull Roofing & Renovations Ltd
“There commitment to getting the job done 100% proud to know them and proud to call them my friends awesome team and local.”
Ajax Roofing Inc
“The roof looks great, and the entire experience in dealing with Ajax Roofing was first rate.”
The 15 contractors listed for Oshawa, 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: Oshawa, ON
10 of the 15 contractors we list are based in Oshawa; the other 5 serve Oshawa from Whitby (8 km) and Ajax (16 km). The contractors on this page are rated from 4.3 to 5.0 across 1,075 reviews; 7 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (92%), responsiveness (88%) and quality (87%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "cleanliness". 2 are open around the clock; 10 are open on Saturdays and 7 on Sundays. The services the contractors on this page list most often on their websites are roof repairs (3), roof inspections (2), roof installations (2) and roof replacements (2). 2 show a licence on their websites. 7 have ten or more years of experience, the longest 21 years. 2 offer emergency call-outs; 1 offers financing or payment plans; 9 give free estimates; 5 are family- or locally-owned and 2 list coupons or special offers. 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.
How many listings here have a website?
A website is on file for all 15 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.
The Spray Foam Guy Inc.
“For the excellent job insulating my garage, looking forward to being able to use the space!”
Berkhof's Roofing
“They did a great job, the crew was professional and fast, they did a thorough clean and nail sweep.”
Crowells Roofing
“Great work done replacing, our 13-yr old shingle roof with a Havelock Metal textured roof they had an amazing eye for every detail.”
Radom Insulation
“Quality workmanship by a couple quality brothers”
C.D. Roofing & Construction Ltd.
“Ryan was understanding of my situation and had his team come over, inspect and fix the issue straight away.”
Windmill Roofing & Exteriors
“After experiencing a leak in our roof he moved up our appointment to ensure that we would be covered if it rained again.”
Norris Roofing
“Their workmanship is exceptional and i was very appreciative of how they cleaned up my yard before leaving.”
Universal Roofs
“Amazing experience from start to finish - They were excellent and able to repair our roof with their quality service and the prices were competitive.”
Petevi Foam Insulation
“Hey there, I hired this guys, and they showed up on time, they did their work properly”
Why these companies made our list
Is this page useful? Yes
No
Is there anything wrong with this page?
