Insulation in engine compartment

[augar boy]

I want to add a heat shield type insulation to my engine compartment in my pusher to add to what's already there. I recently wrapped the exhaust and that helped some but not enough. I thought I would close up the bottom of the hatch between the engine and the bedroom closet but so as to be able to remove it for engine work. Does anyone know if treated plywood with an adhesive backed heat shield insulation would be ok. Will the plywood be acceptable or do I need some sort of tarboard and if so , where might I find this product? I have looked on different web sights but haven't found that board in a sheet other that small pre cut pieces for firewall repairs. Thanks
for any info.
augar boy

[WeatherTodd]

[WeatherTodd]

about $16/roll and the r value is 4. You can double or quaddrupple that by adding additional layers.

[bbeane]

Depnding on what motor you have, you might want to be careful wrapping the exhaust. I to need to do my generator bay and engine compartment (it's on the list of MH projects). I did a little checking awhile back, Summit Raceing had some material, as well as various other suppliers (don't remember now). What I do know is that what I found that was pricey. You need to keep in mind while the engine compartment is likely framed with plywood, any covering should offer some fire protection.

[augar boy]

I've already wrapped the exhaust pipe and the muffler. I called Cummins Southwest and talked with the shop and they told me that they do this quiet often to motorhomes and that even wrapping the muffler was acceptable.
This did help the heat in the bedroom some but I don't think it is enough so I want to try the extra insulation.

[djbmsu]

I would certainly use "non com" plywood for that configuration. Non com wood is available from most lumber yards or can be ordered .nom com= non combustable

[Wizard]

Try here Thermo-Tec : Full product line

I saw the guys on on of the car shows on TV using it.

[a1elect]

In cars and Old etype jags we use Dynamat

[cmpncrsaider]

I was thinking of adding insulation in motor bay too but was concerned about reflecting heat back into motor bay possibly trapping to much heat in there, is that a silly concern? Master bedroom does get a little warm in summer after driving.