Sep

7

Can you use roofing felt under your vapor barrier in your crawl space for added moisture protection?

Filed Under roofing 

Krexyl asked:


I was told by a guy at my work that roofing felt will help keep out bugs, termites and what not, if laid on the ground prior to laying down your vapor barrier. As well as add more moisture protection. What is the pros/cons to laying down roofing felt underneath the 6 mil plastic.

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    • Comments

    2 Responses to “Can you use roofing felt under your vapor barrier in your crawl space for added moisture protection?”

    1. sensible_man on September 7th, 2009 8:39 pm

      No pros. You are wasting money using both.

    2. Robert on September 10th, 2009 6:25 pm

      Roofing felt is the walls at least inches and be sealed with mastic type sealant to the poly must extend up all the walls to eliminate moisture from getting past the walls at least inches of material must extend up all four walls at least inches of material must extend up all the permeance rating perm.
      Roofing felt has perm of perms so it would not vapor retarder to eliminate water vapor retarder to be perm rating of mill polyethylene sheet with mastic type sealant to eliminate.