Service area · Montreal
Attic insulation in Montreal
Montreal is a city of plexes and apartments: in the 2021 census, 7.1% of its homes were single-detached houses and 6.4% were semi-detached or row houses. Isolation Cornerstone goes up into the attics of those houses, working out of its office on rue Lacordaire.
- 36% Before 1961
- 30.4% 1961 to 1980
- 18.1% 1981 to 2000
- 15.5% Since 2001
Single-detached houses: 7.1% · semi-detached or row houses: 6.4%
Share of the 816,355 private households, 2021 census (Statistics Canada). Our office is right here, at 6319 rue Lacordaire.
More than one home in three predates 1961
In the 2021 census, 36% of Montreal homes had been built before 1961, the highest share anywhere in our service area. An attic that old may have been topped up several times by several owners, and it can hide vermiculite. If you have seen silvery-gold granules up there, don’t touch them and don’t go back up: vermiculite can contain asbestos, and it comes out before the attic is reinsulated.
The city was put together piece by piece. In 1910, ten municipalities were merged into it, among them Rosemont, Ahuntsic and Tétreaultville. In 2002, former cities such as Anjou, Saint-Léonard, LaSalle and Pierrefonds became boroughs, and the borough limits have not moved since 2006.
Duplex, condo or house: what LogisVert is for
Duplex units make up 13.1% of Montreal homes. The guide for LogisVert, Hydro-Québec’s programme, is aimed at houses: single-family, semi-detached, row, mobile home or cottage. Condos, multiplexes and apartment buildings do not qualify. In a house heated mainly with electricity, the measure asks for R-50 over the whole roof, with the caulking done in the same project. Isolation Cornerstone handles both, and Hydro-Québec makes the call.
FAQ
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- Where is Isolation Cornerstone’s office in Montreal?
- At 6319 rue Lacordaire. Isolation Cornerstone answers Monday to Friday from 8 a.m. to 7 p.m. and Saturday from 9 a.m. to 2 p.m.; the visit itself happens at your place, in the attic.
- Is it better to blow new insulation over the old rather than strip it all out?
- Depends on what is underneath. A blocked soffit or warm air leaking through the ceiling would stay hidden under the new layer, so Isolation Cornerstone fixes those first, then blows. Vermiculite is never covered over: it comes out first.
- How long does the work take?
- The exact time is given with the quote, once the attic has been seen. On the day of the work, the house is protected with tarps and cleaned before the crew leaves.
Get your free quote
We come and look at your attic in Montreal: the visit is free, and a written quote follows, with no pressure.
Or call us at (438) 544-6512