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If you hired a licesned contractor to install the tile, the leaky pan should be under warranty. I recommend tearing out the entire shower. Even if you have to pay for the replacement tile, I would not do a repair because tearing out the pan compromises the waterproofing on the walls. Also, there are many methods of waterproofing the pan area before tile is installed. We always use the hot mop method. I would avoidAvoid vinyl liners or Red Gaurd. These are cheap unreliable options.
Murray Lampert Design, Build, Remodel
You need a licensed plumber to repair/replace the shower liner. a lot of remodeling companies do not use license plumbers because they are not cheap, and it cuts into there profit. I have been in the plumbing industry for 9 years now. give me call to schedule a free estimate for that leak. 832-557-3293
Suggest that you find a reputable and skilled tile company. If it was a vinyl pan, it may be possible (although not ideal) to tear out the floor and lowest 6-12" of wall tile to replace the pan. It's really something that cannot be easily answered without a close professional examination of the particulars of your shower conditions.
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