Toitures LV
“Laurent goes above and beyond, before , during and even after a year!!!”
Best Insulation Contractors in Laval, QC
15 contractors listed · 12 in Laval · 3 open 24/7 · 5 open weekends · 11 rated 4.5+
Data verified October 18, 2026
Duraclim
“The technician who came to my home did an extraordinary and fast job.”
Couvreur Denis Courville Inc
“Experienced and efficient workers, very respectful of the premises (cleanliness after work) We will have the opportunity to test our new roof with the rain this evening.”
Systèmes Sous-Sol Québec
“Great service for the second time.”
Isolation Multi-Services
“The work is impeccable, they arrive on site and prepare the attic quickly for blowing.”
Constructions Rénovations 4 Saisons Inc.
“After 20 years in business, it is DEFINITELY the most transparent and true company.”
The 15 contractors listed for Laval, QC 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: Laval, QC
12 of the 15 contractors we list are based in Laval; the other 3 serve Laval from Dollard-des-Ormeaux (12 km), Terrebonne (16 km) and Montreal (17 km). 14 of the contractors on this page have a rating, from 4.0 to 5.0 across 2,665 reviews; 8 have 50 or more reviews and 11 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (87%), quality (74%) and value (64%). 3 are open around the clock; 5 are open on Saturdays and 4 on Sundays. The services the contractors on this page list most often on their websites are isolation (4), ignifugation (2) and insonorisation (2). 10 show a licence on their websites. 5 have ten or more years of experience, the longest 25 years. 4 offer emergency call-outs and 1 gives free estimates. We have a website on file for all 15 of the contractors on this page; 13 publish a contact page and 12 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.
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.
Calfeutrage Rive-Nord
“Excellent service, thank you for the great work done at my home.”
Insulation Algon 2000 Inc
“Very friendly people who took the time to protect the areas used before starting the work of adding 15 inches of cellulose in the attic (R50).”
Uréthane Supérieur de Québec Inc.
“Everything was respected: the amount of the bid, the planned work schedule, the mandate as described.”
Les Isolations Girbec Inc
“Are punctual and fast and great work”
Systèmes Éconergie
“Great Attic Insulation Company and Products!”
Isolation Eclair Inc
Montreal Roofers
“That came recommended by a friend and was very impressed with their work and communication”
LG4 Isolation
“I did business with Simon Gareau and I had a perfect job and more than excellent service in addition to being a super friendly person dedicated to his work and customer satisfaction.”
Couvreurs de l'Est
“Everything was clean once the work was completed, true professionals.”
Why these companies made our list
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