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Water Damaged Manabloc Bay Floor - Suggestions on Replacement


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My Manabloc bay has had obvious water damage in the past (no current water issues).  The floor on the underside seems to have had a poor repair, and now the weather proofing material is coming loose.  Seems to need a complete replacement of the floor that includes being weatherproofed on the underside.

What material do you suggest I use?  Are there already these direct replacement floors that are just cut and install?   Please excuse any obvious things I should know.  Any suggestions are most welcome.

See pics below.

 

Manabloc Bay.jpg

Water Damage Under Manabloc Bay.jpg

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Bill

First question I have is what else is behind the panel where the Manabloc is mounted.  Does the issue go into that area also. 

On my coach the Manabloc manifold is in the same compartment as the waterpump, inverter, transfer switch, and water heater.  There are no separations or partitions.  This area is accessible from the larger forward basement compartment via a set of black plexiglass doors and the small basement door on the drivers side next to the wet bay.

If you want a get it & forget it type solution you could go with this https://www.tapplastics.com/product/plastics/cut_to_size_plastic/king_starboard/526 

You can order to a specific size,  BUT it is expensive. 

When I had to repair the floor in my LR I used an exterior plywood and I primed it.  I was able to salvage the vapor barrier that was glued to the bottom of the original floor and when I was done I sprayed it with flexseal.  Time will tell how long it lasts but I'm sure I'll be long gone by then.

In your case you could opt to go with a sheet of treated plywood and then glue a thin water proof sheet to the top and bottom.  https://www.lowes.com/pd/48-in-x-8-ft-Smooth-White-Wall-Panel/3446544

I assume that there is structure underneath to support the piece.  You might try using an oscillating saw to cut the old one out, these work good in tight quarters.  When installing you'll have to make sure to seal the edges with a good waterproof caulk. 

Hopefully someone else can chime in provide suggestions.

 

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Posted (edited)
19 hours ago, jacwjames said:

First question I have is what else is behind the panel where the Manabloc is mounted.  Does the issue go into that area also. 

James - The damage is only in that portion of the bay in the pic.  The inverter part of the bay, which is mounted just behind the Manabloc, is perfectly fine.

And thank you for options.   I'll start by taking out the rotted section and then see what might be the best approach and report back.

Edited by Bill R
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Silly question, where did the water come from the caused the problem. 

If you think water will be a problem in the future I'd recommend the composite type flooring but you might also consider putting a drain or two penetrating out the bottom and use the DuckBill type end that lets the water out and doesn't let critters in. 

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On 5/17/2022 at 1:58 PM, jacwjames said:

where did the water come from the caused the problem.

Previous owner said there was a washing machine leak from leaving the filter screen plug out.  With the underneath water barrier sheathing having come loose I am sure the damage was exasperated by driving in wet conditions 

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