From Greenfield Park to the Laflèche sector, Longueuil was built in postwar waves: small single-family homes from the 1950s, bungalows from the 1960s and 70s, newer semi-detached homes. Many of these attics have never been touched since construction. Topping up with blown-in insulation to reach R-50 is the simplest way to stop heat loss, keep bedrooms comfortable and lower the electricity bill. Enter your address: the price appears instantly, and installation happens within 24-48 hours.
What we find in Longueuil attics
In the attics we insulate in Longueuil, the existing insulation measured 6 inches at the median before the work, or about R-17. Half of the attics measured were between R-15 and R-22. The target in Quebec is R-50, and we install R-51.
- R-17 found at the median
- +34 to add for R-51
- Half of the attics, from R-15 to R-22
- Quebec target, R-50
Depth measured with a ruler by our installers in Longueuil attics, converted to an R-value for fiberglass. Old cellulose would come out about 15% higher.
What it means for a home in Longueuil
For a 950 sq ft attic, the median area we measure in Longueuil, going from R-17 to R-51 means estimated heating savings of about $210 a year, or about $4,200 over 20 years, for a home heated with electricity. How we estimate it
For 71% of the attics we insulated in Longueuil, 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 Longueuil attics
Photos our installers took on job sites in Longueuil, before and after the insulation.
Before
After
Before
AfterYour insulation price in Longueuil, in 2 minutes
Enter your address in Longueuil 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 Longueuil
- Attic insulation (blown R-51)
- Spray foam
- Attic decontamination
- Vermiculite & asbestos removal
- Insulation removal
Grants available in Longueuil
Your work may be eligible for LogisVert from Hydro-Québec ($1,500) and Rénoclimat. We prepare the file with you.
Frequently asked questions: Longueuil
How much does attic insulation cost in Longueuil?
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 Longueuil in the calculator: your exact price shows up in 2 minutes.
Do you need to visit before giving a price in Longueuil?
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 Longueuil?
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 Longueuil?
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.
Also near Longueuil
We serve the whole area. See our Rive-Sud de Montréal page.