Cartoon Network

10 April 2014

Re: [DIY] Re: Loft insulation gaps

 

My statement that it does not block moisture (water vapor) is based on Dupont's statement you quoted saying that it is highly permeable (allows water vapors to pass thru).  Where it says that this reduces the risk of condensation damage... means that it does not trap the moisture.    
As mentioned, this is an arguable question pros do not agree on, either. 


On 4/9/2014 5:10 PM, stratmister@gmail.com wrote:
 

David,

Just when I thought I had it figured out . . . as it concerns this discussion about A barriers such as Tyvek, 
your statement : "does not block moisture"!
is misleading.

here copied straight out of DuPont website and I quote:
"Whether it's a skyscraper or a single-family home, the building envelope is an essential line of defense against air, water and wasted energy.

DuPont Building Envelope Systems offer solutions that meet or exceed codes, help extend building life, and help reduce fossil fuel consumption. They resist moisture and air, but are highly permeable, to reduce the risk of condensation damage, wood rot or mold growth."



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