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Subject:Re: Acoustic properties of common materials
From:Nathaniel Poole
Date:Sun, 31 Dec 2006 15:00:49 -0800

I thought about it, but what I�m going to do is make sure everything is
sealed. Make sure there aren�t any sources of water ingress from the
outside, get handy with a caulking gun. Finish up with sheet poly before the
finish panel. Course I won�t be able to do the front doors. But the other
night while on the highway I noticed that the wheel hump beside the seat was
absolutely freezing. I�m sure if I spat on it it would have frozen. You can
have all the heat you want blowing but when that kind of cold metal lines
the van �wow. I�ll have to think what I should put down around there. Maybe
carpet underlay or something, underneath the rubber mat. On top of the
paint/cellulose. There is also a huge amount of noise coming from the nose
and and floor area.

On 12/31/06 2:08 PM, "Jake de Villiers" <crescentbeachguitar@gmail.com>
wrote:

> You might want to reconsider Nathaniel. The fibreglass will retain moisture in
> there.  
> That's where the foil/bubble/bubble/foil material is best.  More R value and
> no water retention!  :)
> 
> On 12/31/06, Nathaniel Poole <npoole@telus.net> wrote:
>> See http://www.nrcratings.com/nrc.html.
>> 
>> Aside from the acrylic/cellulose slop I'm putting on as a first layer, I'm
>> going to try to stuff the interior panels with fibreglas acoustic ceiling
>> tile. These aren't quite as good as what is listed above, but they also
>> provide thermal insulation. These have an NRC of 55% and Transmission
>> coefficience of 35%. That will make a big difference. And that's before I
>> install the cloth-covered interior surface panels. If there's still space in
>> the "walls" I'll stuff it with more fibreglas.
>> 
>> Nathaniel
> 
>