A good time to do an exterior insulation retrofit is when it’s time to replace the siding or cladding. The best time is to do it when it’s time to replace the siding AND the windows. The best time to replace windows is when the siding needs to be replaced. Cladding, windows, roof. Replacement time means improvement time. Timing is everything. Not just for deferred maintenance, but also for the owner’s monthly budget.
