What Happens to Exterior Insulation When Siding Is Replaced?
When siding is replaced, the exterior insulation underneath should be inspected rather than automatically removed, covered, or reused. Depending on its condition and the new siding system, existing foam may remain in place, need repairs, or be replaced with a new insulation system. JR Girskis, President and Owner of Suburban Construction, recommends evaluating the complete wall assembly—including sheathing, housewrap, flashing, and insulation—before installing the new siding.
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