Donster444
03-18-2006, 11:09 AM
I am installing 12 x 12 porcelain tile with marble accents in a shower. I think I prepped the walls o.k. I stapled poly landscaping plastic to the green sheetrock, I then screwed 1/2" wonderboard to the studs through the sheet rock. I then used the mesh tape and thinset to cover all corners and joints, being careful to keep the surfaces as flush and flat as possible. After a full cure, I applied, with a roller, a uniform coating of redgard membrane. After this dried for weeks, I started the installation of the tile, using a polymer thinset. I wanted to use an unsanded grout, but I have gaps in the grout joints that are up to 1/4" at the marble accents and at the 4 corner intersections. So, after reading several packages, I felt it would be best to use the sanded, eventhough I've heard it is not as easy to keep clean and white.
Anyway, My question is this: I read somewhere that the corners of the shower (where the walls meet) as well as the joint that joins the floorpan should be sealed with an RTV silicone. It seems to make sense to me. Also, if it is advisable to do this, should I leave the joints empty at the corners (to accomodate the silicone), or just place a bead of silicone right on top of the dried grout? One more thought, should grout be sealed prior to applying the RTV or after? Thanks very much to anyone who may have some insight on this.
-Don in New Mexico.
Anyway, My question is this: I read somewhere that the corners of the shower (where the walls meet) as well as the joint that joins the floorpan should be sealed with an RTV silicone. It seems to make sense to me. Also, if it is advisable to do this, should I leave the joints empty at the corners (to accomodate the silicone), or just place a bead of silicone right on top of the dried grout? One more thought, should grout be sealed prior to applying the RTV or after? Thanks very much to anyone who may have some insight on this.
-Don in New Mexico.