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Is it true that felt doesn allow the shingle or shake to breathe, causing them to rot underneath?

April 26, 2017breathe causing felt Rot Shake shingle underneath

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Is it true that felt doesn allow the shingle or shake to breathe, causing them to rot underneath?

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No, not at all. Inadequate ventilation is what causes the underside of a roof to sweat and eventually rot. Good ventilation will not only add many years to the life of the roof, but it will also keep your room cooler in the summer.