Alpine Roofs
“From quote to completion, Kelly and his team were quick, professional, and great to work with.”
Best Insulation Contractors in Nanaimo, BC
10 contractors listed · 6 in Nanaimo · 2 open 24/7 · 7 open weekends · 7 rated 4.5+
Data verified October 26, 2026
Nick's Insulation
“Nick promptly assessed the situation, detailing the necessary steps to remove the Batt insulation, thoroughly clean and disinfect the area, repair damages, and upgrade to blown-in insulation up to R40”
Harbourside Spray Foam
“The quality of their work is outstanding, and I've already noticed a significant improvement in my home's energy efficiency.”
Insulation Nanaimo
“Extremely helpful and I could tell they really wanted to see me get the results I was after.”
Coastal Pacific Insulation
“Great answered all my questions and if they could help call back”
Island Enviro Spray Foam
The 10 contractors listed for Nanaimo, BC 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: Nanaimo, BC
6 of the 10 contractors we list are based in Nanaimo; the other 4 serve Nanaimo from towns including Parksville (32 km), Sechelt (37 km) and Gibsons (41 km). 9 of the contractors on this page have a rating, from 3.5 to 5.0 across 194 reviews; 1 has 50 or more reviews and 7 are rated 4.5 or higher. The topics that come up most in reviews of the contractors on this page are "cleanliness", "price" and "communication". 2 are open around the clock; 7 are open on Saturdays and 4 on Sundays. The services the contractors on this page list most often on their websites are attic insulation (2), blown-in insulation (2), commercial insulation (2), crawl space insulation (2) and spray foam insulation (2). 2 show a licence on their websites. Domain records put 2 websites of the contractors on this page at ten or more years old; the oldest dates from 2009. 2 offer emergency call-outs; 1 offers financing or payment plans; 7 give free estimates; 2 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 10 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.
Absolute Insulation Inc.
“The quote was reasonable, the work was done quickly and efficiently and they even repaired some trusses on my roof with a reasonable extra cost.”
Bar Kat Insulation Ltd.
“Job was perfect the team defiantly knew what they where doing from start to Finnish.”
Blue Frog Spray Foam
“Our home is on a remote island, Rob and the team made it easy.”
District Insulation
Why these companies made our list
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