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Are air barriers / vapour barriers required in all roofs?

April 26, 2017air barriers roofs Vapour

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Are air barriers / vapour barriers required in all roofs?

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Technically seen they are not necessary, but Paroc recommends a plastic sheet or a sealing layer in the lower part on the roof structure. This gives extra security, and the building can, in the future, be used for purposes which increase the moisture load.