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Old 03-07-2017, 02:14 PM   #1
Join Date: Sep 2008
Location: Oklahoma
Posts: 36
Year: 1988
Coachwork: Bluebird
Engine: 454

Hey, we finished step 1 on our bus, removing the seats. We will be removing the flooring and taking it down to steel this weekend. The wood underneath the rubber matting was rotted, and we believe this will give us some extra room for laying the new floor anyway.

So, first things first: Can anyone recommend a good underlay for a floating floor that provides decent insulation? Also, looking for ideas to insulate the sides. We are on a budget, but also want to ensure we do this right.

Thanks for any help you have to offer. And yes, just posting links to posts where this has already been answered would be awesome!
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Old 03-08-2017, 09:53 PM   #2
Join Date: Oct 2016
Location: Beech Grove, IN
Posts: 56
Year: 2001
Coachwork: Amtran
Chassis: International
Engine: T444e
Rated Cap: 35
I am using the closed cell rigid foam board for my underlayment and inside my walls. I am only going with 1" under my floor with a 3/4" plywood on top. I am planning to glue the foam to the floor and the plywood to the foam, so I wouldn't call mine floating though.
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Old 03-09-2017, 06:57 AM   #3
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Join Date: Mar 2015
Location: hills of sw virginia
Posts: 889
Year: 1996
Chassis: thomas
Engine: 8.3 cummins
Rated Cap: 11 window
if your living in it you should spray foam the walls and ceiling, nothing better. whats your ceiling height now? this will dictate how much insulating you can do. if its just a weekender treat the rust and go with it like it is. look at the link in my sig.
living in a bus down by the river.
my build pics
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Old 03-17-2017, 08:50 PM   #4
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Join Date: Dec 2016
Location: Ravenna, OH
Posts: 37
Year: 1991
Coachwork: MetroTrans
Chassis: Ford E350
Engine: 7.3 IDI
Rated Cap: 30
We did foam board cut into 1' wide strips with 1" furring strips sandwiching them in to foam joist. This was on top of the 5/8" marine grade ply that was there and in perfect condition.

5/8 sub floor on top of that

Finally 10mm laminate with a thin foam underlayment

The ceiling will be 1/2" foam board and reflectex with spray foam; the walls will be spray foam. All covered in 1/2" knotty pine T&G.
Leaving June 10, 2017, for 15 weeks. Destination, lower 48, parts of Mexico, all the Candian Provinces that border the USofA. Taking 5 kids and some sandwiches.

Yes, I am crazy.
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