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About How to isolate roofs

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Spray a layer of closed-cell polyurethane foam along with the roof sheathing, supplemented by a layer of air-permeable insulation below and in direct contact with the roof sheathing. Since codes don’t allow air-permeable insulation to be mounted in contact with the roof sheathing Unless of course the sheathing is covered https://captainbookmark.com/story18612831/the-single-best-strategy-to-use-for-how-to-isolate-roofs

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