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Old 04-24-2008, 12:42 PM   #1
gord2001
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Join Date: Mar 2008
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Squeeking Acrylic Shower Base

Hi,

You can skip the details and just go to QUESTION if you like.

Well, it's been some time since I tiled a downstairs shower. Put Porcelain tile on top of Densheild using thin set.

I put the bottom row on last buttering the back of the tile with the thinset. Everything seemed ok for the longest while, but while I was doing measurements for some shower glass, the bond between the thinset (the thinset that was applied to the back of the tile and made it's way to the shower base) and the acrylic shower base let go and caused the loudest squeek you can imagine. Eveytime you walked the the base the squeek was almost unbearable.

All could of been avoided if I would of made sure there was no thinset on the bottom 3/4 inch of tile.

I tried for hours to scrape the thinset out with a bent nail, but to no avail, so decided to bite the bullet and cut off the bottom row of tile by deeply scoring the denshield and prying off the tile.

It was easy to see where the thinset had been rubbing on the shower base. The thinset was shiny as glass were it came in contact with the shower base.

So now I have to replace the bottom 6 inches of denshield and put on new tile.


QUESTION:
========

The Georgia Pacific (maker of Denshield) website suggests putting a good bead of silicone caulking on the edge of the new piece of densheild to seal the seam where it meets the old denshield.

I plan on also sealing the seam with Red-Guard.

Would Red-Guard be better to put between the old and new Denshield instead of using the silicone caulking?

Thanks for bearing with me here.
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Old 04-24-2008, 12:54 PM   #2
John Bridge
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Hi Gord,

I don't use Denshield, but I would go with their instructions if I did.
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