Walls make up the largest surface area of your home's exterior, which makes them one of the biggest sources of heat loss when they're poorly insulated. Isolation Majeau provides professional exterior wall insulation for homeowners across Greater Montreal, Laval, the South Shore, Lanaudière, and the Laurentians, whether you're finishing a new build, renovating, or upgrading walls that were never insulated to today's standards.
Poorly insulated walls let heat escape in the winter and creep in during the summer months, leaving rooms that feel drafty, uneven from one side of the house to the other, and expensive to keep comfortable. Two things determine if a wall is performing well for insulation purposes: the insulation value itself, and how well the wall is sealed against air leakage and moisture.
Professionally-installed wall insulation systems from Isolation Majeau's teams provides everything your home needs: thermal resistance, an effective air barrier, and proper vapour control!
How Isolation Majeau insulates wallsThe right approach depends on the wall and the project. For most exterior walls, we work with two proven solutions, and often a combination of the two:
Spray foam insulation is the highest-performing option. Closed-cell spray foam delivers roughly R-6 per inch, and in a single application it insulates, air seals, and acts as its own vapour barrier at the right thickness. It expands when applied to fill every gap and crevice and adheres directly to whatever it's applied to, eliminating thermal bridging and air leaks that can happen with other insulation types.
Batt insulation, in fibreglass or stone wool, is a cost-effective choice for framed walls with standard cavities. Isolation Majeau's professional teams combine it with careful air sealing and a continuous vapour barrier to insure a high-quality wall insulation system. Stone wool batts can also add valuable fire resistance and soundproofing, which makes them perfect for interior and partition walls.
Whichever your choice - or if you need our expert consultants to help determine which is best for your project - the professional teams at Isolation Majeau can handle any installation!
Why choose Isolation Majeau for your exterior wall insulationIsolation Majeau has been insulating homes across the Greater Montreal region for over 55 years. We install quality spray foam, cellulose, and batt products from leading manufacturers, backed by their warranties, and our expert teams install them to meet Quebec building code. From a single wall to a full home renovation, our experienced crews bring the local knowledge and attention to detail that make the difference between insulation that works and insulation that just fills a cavity.
Get in touch with Isolation Majeau today to discuss your wall insulation project!
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