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Old 05-12-2020, 11:20 PM   #1
Join Date: Dec 2018
Posts: 57
Engine Compartment Insulation

I have a 2003 Holiday Rambler Endeavor RV which I have owned for the past two years and have done several repairs myself with the help and advice of this forum.
I now have a problem with the soundproofing material that lines the area under the floor and the access hatch area around the diesel engine.
The adhesive has failed and the soundproofing material has dropped down on the top of the engine. I have tried using a spray on contact adhesive but the weight of the soundproofing material keeps letting the material pull loose and fall down again.
I could use some good advice what to use to bond the soundproofing to the metal again and the best technique to apply it and fasten it.
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Old 05-12-2020, 11:43 PM   #2
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I would buy a new sheet and replace with a lot of the sound proofing it’s not the material but the anti vibration from the product being stuck to the housing that reduces noise also newer products perform better.
New to us 2000 Monaco executive 40 500hp tag
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Old 05-13-2020, 08:11 AM   #3
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I had the same problem and used the some flooring threshold type strips that had predrilled holes in it. I used these around the perimeter and spaced out in other areas. Used short screws to pull the insulation back into place. This has held for ~8 years.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 250 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 05-13-2020, 08:46 AM   #4
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Spray glue doesn't really work on coarse material. Some construction adhesive or brush on contact cement may work They make fasteners for foam boards if wood is under or plastic cap nails . We use glue on insulation anchors at work then a special push on washer locks to the anchor pin but I don't see both less than 40 for bags. There is a plastic version as well.
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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Old 05-14-2020, 06:30 AM   #5
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Thanks for all the input. I will weigh these options and figure out a way forward.
2003 Holiday Rambler Endevaor
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Old 05-15-2020, 11:28 PM   #6
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i used #8 screws with fender washers in the obvious places and has held up for the last 3yrs and still doing well
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Old 05-17-2020, 10:13 AM   #7
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I want to replace the sound proofing/insulation material. Any suggestions on what to use?
Vera & Ken
1998 Holiday Rambler Imperial, RR8S Chassis
Cummins 6C8.3 mechanical engine, 325HP, 3060 Allison
Towing 2014 Ford Explorer
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Old 05-17-2020, 11:00 AM   #8
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Boeing has an online surplus store:

Ed Mc
Nam vet '66-'67
USMC 1996 National SeaBreeze
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