Thanks, Ron. The piece of particle board with formica finish is already expanding and has dark marks on the unfinished top edge, which tells me something is happening. The "wall" behind the sink is backerboard, the type they used years 45 ago. First he was going to cut out a piece of drywall to insert in the place where there are holes. He spoke of fastening it to the studs. Then he was going to go to a big box store and get a slab of formica board such as that they make shelves with, and cut it to size and use liquid nails to put it on the drywall. Then he was going to caulk it to the counter which is already there by the sink. The drywall & formica would go behind the sink and there is about 1-1/2" counter space there from the back of the sink to the wall.
From: ronaldwswanson <ronswanson@sio.midco.net>
To: DoIt_Yourself@yahoogroups.com
Sent: Monday, February 27, 2012 11:43 PM
Subject: [DIY] Re: Backsplash by sink
To: DoIt_Yourself@yahoogroups.com
Sent: Monday, February 27, 2012 11:43 PM
Subject: [DIY] Re: Backsplash by sink
--- In DoIt_Yourself@yahoogroups.com, Cindi Waters <clean_boost@...> wrote:
>
> I am worried that water will damage the Formica, but I guess not. I guess I'll have to settle with that short of having tile put there.
Cindi: Under no circumstances would I do such a thing. The water won't hurt the Formica but it will turn the particle board to dust. Particle board has a natural absorption quality and will turn to powder when wet, right after it blows up, expanding like a cheap sponge.
Assuming the existing wall is Sheetrock: Sheetrock expands and contracts at a different rate than particle board & Formica, especially when near moisture and an outside wall. This means that the caulk will work okay to begin with but long term, is bound to fail on wildly dis-similar materials. When the caulk fails the patch will fail.
What is the plan to attach this ensemble to the wall? Glue? Dry wall screws through the particle board into the studs and then hang the Formica from that?
I think maybe I'm misunderstanding the problem. But if it is as I think it is, why doesn't the painter just replace that little piece of damaged Sheetrock, put on a good coat of primer and paint and caulk where the countertop meets the wall?
Good Luck ... Ron
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