I need to know if I should caulk the 1/4" expansion gap at the wall.
I'm re-tiling because all my tiles done last year right over the wood floor are coming up in the kitchen. This time I'm adding a layer of 3/4" plywood with backer board on top.
I've read that I need to leave a 1/8" gap between the boards and 1/4" at the wall. I can caulk (and tape) the area between the boards, but most websites say not to cault the 1/4" at the wall. My contractor says that will allow water in. Also there will be 3/4" plywood and then perhaps 1/2" backer board and then 1/4" tile, leaving a deep gap. We kind of compromised that he would caulk just the part where the tile is.
I'd am wondering whether that's the best approach. Should I put a baseboard around the edge of the tile (the contractor wasn't planning to)? Am I right in insisting the deep gap not be filled? It is OK to just caulk the top 1/4"?
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