I just installed Fat Mat in several areas of my Vanagon.  While I haven't
installed it under the carpet yet, that task is on my list.  I don't see how
water could get trapped under the Fat Mat.  The self adhesive stuff is
extremely strong.  If the Fat Mat is properly installed it should tightly
adhere to all contours in the sheet metal.  I just don't see how water could
seep under the material once it is installed.

Jake
82 AC Vanagon

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
Tom Salicos
Sent: Wednesday, January 25, 2006 1:31 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Soundproofing and Trapping Water?

I am concerned about putting Fat Mat under the carpet since it is a solid
barrier.  For those who have applied a solid barrier under the carpet, did
you leave it as "removable"?  It seems trapped water would tend to stay
trapped.  

Also, what did you use to stick down the carpet after the soundproofing was
applied?   

Tom Salicos

'87 Syncro Westy  EG-33