Across the east and north of the island (Ahuntsic, Saint-Léonard, Rivière-des-Prairies, Mercier) thousands of bungalows and duplexes built between the 1950s and 1980s have a real, accessible attic. That's where blown-in insulation performs best: we bring the attic up to R-50 in a few hours without touching the roof. Warmer bedrooms in January, less strain on the AC in summer, and a price you know upfront thanks to the online quote calculated from your address.
What we find in Montréal attics
In the attics we insulate in Montréal, the existing insulation measured 8 inches at the median before the work, or about R-22. Half of the attics measured were between R-17 and R-28. The target in Quebec is R-50, and we install R-51.
- R-22 found at the median
- +29 to add for R-51
- Half of the attics, from R-17 to R-28
- Quebec target, R-50
Depth measured with a ruler by our installers in Montréal attics, converted to an R-value for fiberglass. Old cellulose would come out about 15% higher.
What it means for a home in Montréal
For a 810 sq ft attic, the median area we measure in Montréal, going from R-22 to R-51 means estimated heating savings of about $120 a year, or about $2,400 over 20 years, for a home heated with electricity. How we estimate it
For 80% of the attics we insulated in Montréal, we opened the LogisVert grant file with the client. The grant goes up to $1,500, and we handle the paperwork.
Before and after, in Montréal attics
Photos our installers took on job sites in Montréal, before and after the insulation.
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AfterYour insulation price in Montréal, in 2 minutes
Enter your address in Montréal and get an instant price for insulating your attic, no visit and no salesperson. An installer confirms the measurements free of charge on-site before the work, and you're usually installed within 24 to 48 h.
Not sure what your attic insulation is worth? Measure it with our R-value calculator. A ruler is all it takes to see how many inches are missing.
Our insulation services in Montréal
- Attic insulation (blown R-51)
- Spray foam
- Attic decontamination
- Vermiculite & asbestos removal
- Insulation removal
Grants available in Montréal
Your work may be eligible for LogisVert from Hydro-Québec ($1,500) and Rénoclimat. We prepare the file with you.
Frequently asked questions: Montréal
How much does attic insulation cost in Montréal?
For a typical attic, the market average is around $2,495 before taxes. At Isolation à Rabais, the same project comes to $1,995 before taxes, and $495 after the LogisVert grant if you qualify (it's paid after the work). Enter your address in Montréal in the calculator: your exact price shows up in 2 minutes.
Do you need to visit before giving a price in Montréal?
No. The price is calculated online from your address and attic area. An installer then confirms the measurements free of charge on-site, right before the work, if anything differs, we tell you before starting.
What grants are available in Montréal?
LogisVert from Hydro-Québec offers $1,500 for roof insulation combined with air sealing (the attic must reach R-50), and Rénoclimat can be added depending on the work. We prepare the file with you.
How fast can you insulate my attic in Montréal?
Installation is usually scheduled within 24 to 48 hours after you accept the quote, and a typical attic takes 2 to 4 hours to complete.
Before you decide, read our attic insulation price guide, the insulation standards in Quebec and how we estimate heating savings.