Noise cover for doghouse on class a.

[tck]

Some time back I thought one of the magazines had an article or section on installing a specific material for noise abatement under the doghouse cover.  Does anyone have any info on this subject or any ideas.
Thanks
TCK

 

[Tom]

OEMs use a foam that has an aluminum skin on the underside (engine side). I'm scratching my head over where I've seen this stuff.

 

[Gary RV_Wizard]

I added the foil-skinned foam insulation to a previous motorhome that had both a noice and a heat problem from the doghouse.  I believ Igot the material at a local home store, maybe Home Depot.  It was actually a silver mylar skin that reflects heat over something that resembled bubble wrap (large air cells) for insulation and I simply glued it in with contact cement.  It helped quite a bit.  I think there is something similar used for air conditioning ducts, only it is foil over fibergalss insulation.

 

[Clay L]

West Marine has a good selection of material for that purpose. It's used for insulating engine compartments. They have a web site with a lot of info. http://www.westmarine.com/

 

[Tom]

Clay,

I've never seen that stuff at our local WMP stores, but that might be because different WMP stores stock slightly different things, depending on their local market. I tried searching and browsing their web site, but couldn't come up with that material. Do you have a link to the specific page or specific product?

TIA.

 

[Clay L]

Tom,

The following link shows one material they have. It's not fireproof but is good up to 225'F.
The store near Boston used to have a couple of others, haven't been there in a while and don't know if they still do.

HERE

A brief discription:
"This flexible composite combines the sound-absorbing properties of open-cell polyurethane foam and the noise barrier capabilities of high-density PVC vinyl sheeting. The 3/32" flexible vinyl sheet is fused between two layers of foam?an exterior (?decoupler?) layer and an interior (?absorber?) layer. The exterior layer is then covered with a thin film (2.5 mil) of mylar, reinforced with elastomer-coated fiberglass, for surface heat protection and enhanced sound absorption. 
The overall effect is a dramatic noise reduction when compared with single-layer foam barriers
Material is fire-retardant (not fireproof) up to 225?F
Available in two overall thicknesses
Decoupler thickness is 1/4"
Absorber thickness is 1/4" on the 1/2" kit, 3/4" on the 1" kit
Peel and stick backing for easy installation
When using overhead, nail hangers should be used "


Clay

 

[Tom]

Thanks Clay. Don't know why I couldn't find the right page. That looks similar to the stuff I have on the underside of the decks in the engine room of the boat. That would certainly work for the underside of a doghouse.

 

[Clay L]

Thanks Clay. Don't know why I couldn't find the right page. That looks similar to the stuff I have on the underside of the decks in the engine room of the boat. That would certainly work for the underside of a doghouse.

Tom,

You couldn't find it because it was pretty darned hard to locate. None of catagories that seemed to fit  showed it.
I knew it should be there - unless it had been discontinued - because I got a snail mail  sales brochure sometime back and it was featured, so I perservered.

Clay

 

[Tom]

That's an issue I've had with their web site for some time Clay - tough to find what I need.

 

[tck]

Thanks for the help guys.  I will check both West Marine and the local Lowes/Home Depot.
TCK