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We've got a 1/2 inch gap between our bathtub faucet and the tile, and as you can imagine water has been leaking through and sometimes even dripping though the wall to the floor below. The tile is starting to wear out and chip off as well, so I'm not sure if caulking will hold or even work for such a large gap. We are saving up for a bathroom reno but need some sort of solution to hold us over for the next few months at least.

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That is too large of a gap to seal with caulk. If you are looking for a (very) temporary solution you would be better off with plumber's putty. Get a tub of putty (it is not expensive) and knead it well until it is warm and soft, then pack the void with it. It should do a fair job of keeping the water out for awhile, until a proper repair can be completed.

Proper repair would be removing the tub spout and properly sizing the pipe so the spout was close to the tile, then caulk.

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  • Thanks, I'll see how easy it is to resize the pipe, in the meantime I can try the putty
    – Alex
    Nov 13 '20 at 15:31
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Tiled walls aren't waterproof. the individual tiles are waterproof but the grout always leaks. this is why a waterproof membrans is applied behind the tiles in wet areas.

A propper fix involves removing the tiles and sealing the pipe to the waterproof membrane behind the tiles.

maybe you can get in there with the spout removed and stop it up enough with a waterproof caulk to prevent most of the leaks .

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