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.
Also see: Home insulation, wall insulation, attic & roof insulation, floor & ceiling insulation and urethane & polyurethane foam insulation
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