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I have a shower with a leaking shower pan. I am trying to do some of the demolition myself before getting it repaired. I am removing the tile floor and the underlying mortar. Below the mortar is a layer that looks like concrete. Is this in fact what it is and if so, how do I remove it? Is replacing a leaking pan a job for someone with limited home repair experience or am I getting in over my head? I think I need to get down to the subfloor and evaluate that for water damage. Is that correct?
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Yes you want to get down to the subfloor.
When I've done these shower pans, I install blocking between the wall studs to hold the mortar. Then pour a layer of mortar sloping toward the drain. The next day, I lay the rubber liner, stapling it to the blocking and studs. Then pour another layer of mortar, carefully sloping it. I think this is the critcal point for making a nice, smooth tile floor. If it wavers or flattens out anywhere, you will have a tile edge sticking up or tile vulnerable to cracking. I think a homeowner can do this if you take your time. If you see anything that's not perfect be patient and re-do it. Don't move on to the next step. The Home Depot tile book has an OK guide for doing this.
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