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Old 09-11-2017, 10:43 PM   #1
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Gaps in subfloor perimeter waterproofing

This is my first technical post - hopefully my search was exhaustive enough that I'm not covering old ground!

Does anyone know why the black waterproofing paint around the edges of the subfloor in my 2015 27FB has 1” gaps in it (see photos below)?

We had a couple of gallons of water spill onto the floor and, since the airstream was on an incline, much of it seeped down through the subfloor and out the plastic molding beneath our dinette. I pulled out the dinette seat on that side and pulled up the vinyl flooring. The only part of the plywood subfloor that was wet was these 1” gaps in the black waterproofing around the edges.

Now that it's dry I'd like to paint on some AFM Safecoat Watershield (nontoxic waterproofing) to cover the exposed plywood areas before I reinstall the dinette seat. Does anyone know of reason why they should remain bare instead? There are 2 of them in the 8 linear feet of subfloor perimeter that I exposed, which makes me suspicious that they are there for a reason.


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Old 09-12-2017, 12:53 AM   #2
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Looks like spots where something might have been holding the wood while they painted the wood. No reason it can't be covered.
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Old 09-13-2017, 12:05 AM   #3
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Thanks, HiJoeSilver. We waterproofed it today on the bare spots. So far so good. Looking forward to getting to reassemble everything and use the dinette again tomorrow. And lesson learned: always move the water fusti to the ground before towing - even if you're just pulling it across the street!
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Old 09-14-2017, 03:22 AM   #4
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What's a water fusti?

Always make sure the pump is off when moving. Don't ask me how I know, but thankfully it wasn't me.

Glad I could 'help'.
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Old 09-14-2017, 12:57 PM   #5
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A 'fusti' is a stainless steel container for holding and dispensing water (or olive oil, which is what they were designed for). We use it to hold our drinking water. It normally lives on the kitchen counter by the door - which is where it was when it tumbled to the floor during our move.

Thanks for the tip on the water pump. We're normally pretty good about it, but I'll take it even more seriously after this experience. We're just reinstalling the dinette now - it's tricky reaching all those screws on the back wall!
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Old 09-14-2017, 02:36 PM   #6
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I should have googled it, those are nice little containers.
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