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Question DetailsAsked on 4/9/2014

IS A VAPOR BARRIER NEEDED IN A CRAWLSPACE

I AM PURCHASING A HOME THAT HAS HIGH RH AND SOME AREAS WITH STANDING WATER. I AM HAVING A SUMP PUMP AND PIT PUT IN, BUT THE CONTRACTOR TELLS ME THAT I DO NOT NEED TO REPLACE THE WET VAPOR BARRIER THAT IS ALREADY IN CRAWLSPACE? HE SAYS A VAPOR BARRIER IS NOT CODE ANYMORE. IF THAT IS THE CASE HOW DOW I GET THE RH DOWN IT IS CURRENTLY 69%

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A vapor barrier may not be required by code in your area - that does not mean it may not be needed. If you are putting in a sump pump you obviously have moisture problems, so a vapor barrier is clearly a good idea - certainly if your humidity is 69%, which is well into the mildew/mold growing range.


You say a "wet vapor barrier" - can you explain what you mean by that, using the Answer This Question button right under your question ? How is it installed, what is it made of, and how is the sump pump installation going to affect it that you are considering replacing it.

Answered 5 years ago by LCD




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