There is supposed to be a 36" wide moisture barrier underlayment at all valleys, 18" to either side if installed correctly, therefore no chimney(s), plumbing vent(s), or flue stack(s) shall be placed within 18" of a valley. Penetrations to the moisture barrier may eventually leak and these areas will require further monitoring and sealant application if not relocated and installed correctly.

I just edit out the one(s) that are not present in the valley.

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badair http://www.adairinspection.com Garland, TX 75042
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