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Old 01-23-2012, 05:47 PM   #1
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Insulation in engine compartment

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
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Old 01-23-2012, 07:11 PM   #2
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Old 01-23-2012, 07:15 PM   #3
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about $16/roll and the r value is 4. You can double or quaddrupple that by adding additional layers.
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Old 01-23-2012, 07:17 PM   #4
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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.
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Old 01-23-2012, 07:26 PM   #5
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wrapping exhaust

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.
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Old 01-23-2012, 07:46 PM   #6
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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
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Old 01-24-2012, 07:53 AM   #7
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Try here Thermo-Tec : Full product line

I saw the guys on on of the car shows on TV using it.
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Old 01-27-2012, 02:21 PM   #8
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In cars and Old etype jags we use Dynamat
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Old 01-28-2012, 06:46 PM   #9
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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.
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