bottom in one corner, on the bottom two corners are cracked on both sides along the bottom allowing water to go into the "pan" I suppose. So, if you go for a tile shower make sure the person doing it knows what they are doing. We had the licensed contractor building an addition to the house do the shower. Needless to say we also have a lot of problems with the sunroom construction. We haven't had one contractor come to our home and do a good job. Why? In S. Florida we didn't have this problem. The contractor for the addition was a referral from the Better Homes and Gardens website. So again I say, make sure whatever you choose that you check out the contractor. We don't know what to do now with our construction mess.