Your basement is a large area that is critical to your insulation: according to Canada’s Office of Energy Efficiency, an uninsulated basement increases energy consumption by 25% or more!
With the new thermal insulation standards, you must insulate your basement, whether you intend to finish it or not!
Most rigid insulation products do not eliminate air infiltration. The result is heat loss and risks of condensation and mould.
Another major problem with polystyrene sheets: the joints between end joists and the foundation walls. Only sprayed urethane can perfectly seal the space between these two components.
Sprayed polyurethane foam: its high expansion and adherence factors make it possible to perfectly seal all types of surfaces – including concrete, which is a porous, uneven and conductive substrate.
A single application is enough to meet RBQ standards. Additional features of sprayed polyurethane foam include:
Our answers to a few frequently asked questions:
(* Also protects against soil gases, including radon)
Before mounting your basement walls, we recommend applying sprayed polyurethane foam, to avoid thermal bridges.
The application of 2.5 inches of sprayed polyurethane foam allows you to:
Also, sprayed polyurethane foam:
For assured comfort and energy savings, this space should be heated, and its walls need to be insulated. Among other benefits, this will keep your feet warm!
Steel structure elements – and even some solid wood elements – are conductors, and they can conduct cold air from the outside and be a source of condensation.
These structural elements are often located in cramped areas, and spraying polyurethane foam is recommended, given its high R-value and adhesive properties.
The underside of the foundation slab should be insulated (at least an R-value of 5 across the entire surface). You must also include protection against soil gases, especially radon, in order to comply with RBQ requirements (see the Quebec Building Code, Article 9.13.4 - available in French only).
A widespread “insulation solution” involves placing polystyrene sheets and a vapor barrier under the basement slab.
However, this combination poses several problems, particularly regarding radon infiltration:
This explains why this type of insulation is ineffective, especially against radon infiltration.
According to Isolation Majeau, only one type of insulation effectively attaches and seamlessly seals the concrete slab to the end joist: sprayed polyurethane foam.
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