Insulation saves energy and reduces GHG emissions, but to be effective, it is especially important to reduce air leaks and heat loss by installing the right insulation in the right place. Attics, walls, floors and foundations all have their own specific requirements, based on their structure and exposure to humidity. No matter where the insulation is being installed, you should always choose the one with the highest R or RSI value.

Our recommendations :

1. Installing cladding and insulation on the outside of the foundation walls is the most effective way to reduce humidity. Since foundations have to be accessible to insulate them this way, your best bet is to plan this to coincide with excavation work.
2. After ensuring there is no infiltration and no trace of dampness on the walls, apply spray polyurethane foam. Instead of spray foam, you can also use insulation panels fastened to the walls or batts tucked between the wall studs. In this case you will also need a vapour barrier on the warm side of the insulation.
3. Choose water resistant drywall or cement backer board with metal studs, rather than wooden ones, to prevent the proliferation of mould, especially if you have trouble controlling the dampness in your basement.

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