Charlie: Michael is in Alvintown with our last question this morning, as people cheer.
Charlie: I have a new tile shower stall installed after a remodel. I had subway tile set in the mortar over the orange waffle mat used today in the work. He said the question he has is should this floor flex in a small amount? Because there’s no visible movement by feeling, but the grout is showing slight cracks between the wall and the floor. Is this normal? [display podcast]
Tom: The wall and the floor always moves. The walls move with the floor and that’s why where you have that transition where you have a wall and a floor or a wall and wall come together in a little corner, you’re gonna get some cracking because of the movement of the house and that usually means that those areas need to be caulked with a flexible caulking and not necessarily a grout. If you have a good pan, though-
Charlie: He says he’s used 100% silicone.
Charlie: On that edge.
Tom: My answer is why? 100% silicone is a different product. You would use a colored caulking that would match the grout and everything. If he used 100% silicone, even if it cracked, silicone didn’t crack. It’s just clear. So he’s looking at cracks below the silicone.
Tom: I’m not sure what he’s getting at with that but 100% silicone is always clear, so he’s looking at cracks in the grout, yeah. If it’s got silicone on top, I don’t know how good that would look but you’re gonna see the cracks of the grout below it, yes.
Charlie: But they make a flexible caulking you can put in there, Tom?
Tom: Yeah. You have a latex … A siliconized latex caulking that we use all the time. You can even get some caulkings now that almost have little sand in there so it looks like the grout but it’s more flexible because it is siliconized. Not 100% silicone. That would be a whole different product, but they have a little silicone or a little bit of latex and it moves a little bit, like the big stretch caulks and things like that, but 100% silicone, that’s a very special product to be used only in certain areas, like around glass where you have glass doors for showers and stuff.