How to repair MDF beadboard above a sink?

Thank you restorationcontractor and Bob Marvin. I don’t have the bandwidth for a major job of pulling out the sink, etc., but maybe it will come to that, so for now temporary solutions will be great. Thanks again.

citizenjane

in General Discussion 5 years ago

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citizenjane | 5 years ago

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Hi all, first – best wishes for health!

Secondly, we made the (seemingly) bad decision to install beadboard behind a small corner sink, without a backsplash or any other sealant. Well, now the edges are curling/fraying.

Has anyone ever installed tile over MDF beadboard? I don’t see any other solution to managing this. Photos below.

Thanks for any recommendations you can share!

[7F2E8F1F-A9B4-4A78-8756-A1ABC63BE988](//muut.com/u/brownstoner/s3/:brownstoner:KMFy:7f2e8f1fa9b44a788756a1abc63be988.jpeg.jpg) [9ADFAF06-E4E0-4842-B411-AFCCB9A26729](//muut.com/u/brownstoner/s3/:brownstoner:p6AC:9adfaf06e4e04842b411afccb9a26729.jpeg.jpg)

restorationcontractor | 5 years ago

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I don’t see why it wouldn’t work. I would make sure the mdf is completely dry, sand the surface and cut down the high spots. Apply tile using mastic, then grout and grout sealer.
If the mdf is wet or gets wet in the future the tile may fail, but as I see it what do you have to loose.
Since its over mdf its probably not worth the cost of putting on a liquid applied waterproofing membrane over the mdf first.

RobertGMarvin

in General Discussion 5 years ago

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Why not rip out the MDF and install real wood beadboard? I know this would require removing and re-installing the sink, but, as you learned, MDF is inherently unstable around moisture and, I think, any other solution is doomed to fail. You could install tile over the wood beadboard. I did that in my half-bath a few years ago and it’s worked well. However I don’t think the tile is really necessary if the wood beadboard is properly primed and painted. I did it for appearance, since I had tile left over from my kitchen backsplash.