From: FC 
Newsgroups: misc.consumers.house
Subject: Re: R-rating of TYVEK
Date: Mon, 29 Sep 2003 14:54:40 -0500

Tyvek isn't for insulation thus I doubt there is a R-rating exist.

FC

QuantrelRaiders wrote:
> What is the R rating of Tyvek?
> 
> I often see new houses built like this: they throw up some studs, then they
> stick in the chipboard, flakeboard (which I guess now is called Oriented
> Stranded Board). Then I see the builders just tack on Tyvek (a kind of high
> strength plastic material). Right on top of that, they put on the tin
> siding...er aluminum or plastic siding. NO INSULATION in the walls, at all. How
> or why they do this, is none of my real concern.
> 
> But, I am interested to learn what the industry or contractors may deem the
> R-rating for Tyvek to be?
> 
> Thanks, all.