Service area · Laurentides
Attic insulation in Saint-Jérôme
Saint-Jérôme was formed in 2002 by merging four towns: Bellefeuille, Lafontaine, Saint-Antoine and the former Saint-Jérôme. Isolation Cornerstone insulates the attics of all four sectors, and the visit is free.
Four former towns, four ages of attic
Each sector grew in its own time. Saint-Antoine is the first suburb that formed around the centre, in the 1960s; Lafontaine has seen a lot of building since the 1990s; Bellefeuille mixes residential neighbourhoods with rural areas. The 2021 census adds it up: 13% of homes predate 1961, 24.4% date from 1961 to 1980, 27.7% from 1981 to 2000 and 34.9% from 2001 on.
So no two sectors have the same attic. On the streets built in the 60s, we often find old yellowed batts, thin and packed down between the joists. In a neighbourhood from 2010, a house is not necessarily at R-50 across the whole roof.

- 13% Before 1961
- 24.4% 1961 to 1980
- 27.7% 1981 to 2000
- 34.9% Since 2001
Single-detached houses: 37.2% · semi-detached or row houses: 6%
Share of the 37,370 private households, 2021 census (Statistics Canada). Our office on rue Lacordaire is 53.4 km away, about 47 minutes by car.
The centre and its parish neighbourhoods
The former town of Saint-Jérôme, now the central sector, has neighbourhoods that still carry parish names: Saint-Pierre, Sainte-Paule, Sainte-Marcelle, Saint-Lucien. It was shaped by a large working-class population until the middle of the 20th century.
If an older house makes you think of vermiculite, those silvery-gold granules, stay out of the attic: it can contain asbestos, and it comes out before anything gets insulated.
FAQ
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- My house in Bellefeuille dates from the 1980s: is it better to redo the insulation or add more on top?
- The order does not change: air leaks sealed first, insulation blown in last. The visit is free, and the written quote says what needs to be done. Vermiculite, if there is any, comes out first and is never covered over.
- LogisVert vs. Rénoclimat: which one applies to attic insulation?
- LogisVert, from Hydro-Québec, covers roof insulation done together with caulking, in a house heated mainly with electricity. Rénoclimat, from the Québec government, requires an energy evaluation before and after the work, and can complement LogisVert when the work is separate. Each programme alone decides whether you qualify.
- Is the visit for the quote really free?
- Yes. Isolation Cornerstone comes to look at the attic at your address and gives you a written quote, at no charge and with no pressure.
Get your free quote
We come and look at your attic in Saint-Jérôme: the visit is free, and a written quote follows, with no pressure.
Or call us at (438) 544-6512