Expert Q
Question:
I want to replace my aluminum siding
Answer:
The old siding should certainly come off and underneath the new, you might consider 1.5" of rigid fibre insulation rather than foam because of the cost. More than 1.5" of rigid foam becomes a vapour barrier on the wrong side of insulation and you don't want that. Fibre, on the other hand, can be applied in any thickness.
Answered By: Ren Molnar
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