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Old 11-22-2019, 02:43 PM   #1
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Join Date: Jul 2017
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Year: 1993
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Skip the subfloor?

Hey guys..


Working out some details of our interior build out. One of our big issues is headroom. We can't afford to lose any.


Once we pull the interior sheet metal, we'll have room for proper insulation without losing height... but the floor on the other hand, not so much.


The original floor was just a rubber mat over sheet metal. My plan is to repair the sheet metal... seal/prime/paint... then go over it with a quality underlayment.. possibly some 1/4" fan fold... then a quality moisture proof laminate floor. I also have quite a bit of Damplifier Pro sound deadener that I may put down under it as well. It's a great thermal/noise barrier.


Anyways.. I strongly doubt we'll ever be traveling distance in the winter so I'm not overly worried about the floor getting cold. Are there any other concerns that I'm not thinking about that would demand the need for a subfloor?
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Old 11-22-2019, 02:49 PM   #2
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I don't see a problem with that, beyond the obvious and expected lack of insulation value. I'm personally thinking about a this XPS layer with a relatively thin t&g faced plywood + stain + polyurethane floor, hoping to get it all done in an inch.
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Old 11-22-2019, 02:52 PM   #3
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Year: 2003
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Our original floor was plywood under the rubber mat, somewhere around 3/4" thick total. We used 1/2" foam board insulation with furring strips, 9/16(?) OSB and then some click laminate wood flooring. We still have the original floor in the workshop and it's only a slight (1/4") difference between the original and new sections.
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Old 11-22-2019, 03:24 PM   #4
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Year: 1993
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Quote:
Originally Posted by ermracing View Post
Our original floor was plywood under the rubber mat, somewhere around 3/4" thick total. We used 1/2" foam board insulation with furring strips, 9/16(?) OSB and then some click laminate wood flooring. We still have the original floor in the workshop and it's only a slight (1/4") difference between the original and new sections.

I did something similar on our short bus and it worked decently but it had more headroom than our big bus does. Our big bus didn't have any wood.. just sheet metal and ~3/8" rubber. I figure with a good underlayment and some fan fold, we'd probably be around 1/2-5/8" which would fine for what we are doing.
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Old 11-22-2019, 10:26 PM   #5
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At least remove the rubber. That stuff is GROSS
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Old 11-23-2019, 07:18 PM   #6
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At least remove the rubber. That stuff is GROSS
Yup. Rubber is up and the metal under will be repaired and sealed.
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