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The best solution would be to fill the 2x4 cavities with foam. This could be done either by filling each cavity from the top or by removing the siding. You have to be careful to use the correct foam (non-expanding) if you are going to fill the wall cavity without removing the siding. There are many companies that sell non-expanding foam kits and here's a ...


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Provided you don't have knob-and-tube wiring, this one is easy. Remove the vinyl siding, cut holes through the EPS foam and the sheathing at the top of each stud bay, and inject dense-packed cellulose into the empty stud bays. Should be pretty cheap and help a ton. I wouldn't use retrofit-style non-expanding foam. It'll be more expensive, highly flammable, ...


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If you're going to rip off the siding, then insulate from the outside. If it were my house, I would remove the clapboard and sheathing, then spray in expanding foam. Follow the recommendation of the foam insulation manufacturer for how to finish the outside before you install your vinyl siding. Another good alternative is to blow in loose insulation. Since ...



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