You could use multiple layers of the 1/4" white closed cell foam we use for
engineered wood floor underlay.  It is legal as a vapor barrier in some
jurisdictions, so you don't have to worry about it absorbing water.

That's the only idea I have.

Jake

On 8/29/06, Florian Speier <groups.florian@gmail.com> wrote:
>
> Hi List,
>
> I just ordered fatmat (following the brent weide trend) for my sound
> insulation. However, if I have the panels off, I would like to use the
> chance to add some decent thermal insulation on top as well. I think the
> optimum would be something like 1/2 inch closed cell polyethylene foam,
> like
> www.reimo.de sells it for that purpose, but cannot find anything like that
> from an american supplier. any ideas? i dont want to use fibreglass as it
> holds water and dont want to use the blue roof sheedt insulation stuff
> from
> dow chemicals as it is rigid.......
>
> flo
>

--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
www.crescentbeachguitar.com