On Apr 8, 2010, at 2:04 PM, pdooley wrote:

> I shoulda google searched before posting that.
> Seems like others say tyvek no good for same reason.
> You just want suitable plastic.

Vapor barrier like 6 mil poly keeps vapor from migrating from the warm
side to the cooler side, while Tyvek like materials (house wrap) are
on the outside & must be permeable to allow any condensation inside to
migrate to the outside. No Tyvek needed in a vanagon, but the interior
vapor barrier is critical to keep your metal from rusting & door
panels from warping.

YMMV,

Mr. BZ-vapor migration is insidious
>
> At least the other home depot product (peel-n-seal) works good!
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> Behalf Of
> Jake de Villiers
> Sent: Thursday, April 08, 2010 3:11 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Was: Stereo Upgrade Project Now: Vapor Barrier
>
> You don't need the barrier to breathe, the water's supposed to drain
> out the
> holes in the bottom, not warp your door panels.  =)
>
> Cut yourself a new liner from 6 mil poly vapour barrier, available
> at home
> centres and lumberyards everywhere.  Install with the caulk of your
> choice
> and you're golden.
>
> On Thu, Apr 8, 2010 at 11:34 AM, pdooley <psdooley@verizon.net> wrote:
>
>> Something I always thought of using is Dupont Tyvek.
>> It's a high performance vapor barrier for homes, installs under the
>> sheathing.
>> Suppose to let moisture out of the walls but keeps water from
>> entering.
> So
>> it breathes but doesn't leak.  It's also very durable.  Some mailing
>> envelopes are made of this stuff, doesn't rip or tear.
>> Installs with a regular looking tape available at lowes/home depot
>> etc.
>>
>> I'm gonna try it next time the need arises.
>>
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
>> Behalf Of
>> David Beierl
>> Sent: Thursday, April 08, 2010 1:57 PM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Re: Was: Stereo Upgrade Project Now: Vapor Barrier
>>
>> At 01:27 PM 4/8/2010, Peter DiFalco wrote:
>>> So... what should I use as a vapor barrier? Any online sources for
>>> that?
>>
>> The original is polyethylene film, I'm guessing ten mil.  Regular
>> household Saran Wrap is the best easy-to-hand vapor barrier I know,
>> much better than polyethylene for equal thickness.  That and tinfoil,
>> which is harder to handle but a perfect barrier.
>>
>> Yours,
>> David
>>
>
>
>
> --
> Jake
>
> 1984 Vanagon GL 1.9 WBX 'The Grey Van'
> 1986 Westy Weekender/2.5 SOHC Suby 'Dixie'
>
> Crescent Beach, BC
>
> www.thebassspa.com
> www.crescentbeachguitar.com
> http://subyjake.googlepages.com/mydixiedarlin%27