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Ensure that you have the proper shower pan drain before we arrive! The shower pan drain must be a two-piece drain with a removable flange. The two-piece drain is important because we take the top flange off at the start of the hot mop, and then attach it against at the end. Removing the top flange before the hot mop ensures that we do not mop over any weep holes and putting it together gives it a water tight seal. Down below are some examples of preferred and common drains used for hot mopping shower pans.
All pans need to be blocked with a minimum of 10" from the pan floor. All hot mop blocking need to be solid. You can do this by using a 2x10, but any type of wood is fine. All nails need to be flushed with backing and all corners need to be nice and squared, so the hot mop can be squared. In places where the wood blocking isn't permitted, you can add a sheet of sheet metal as shown in the photo to the right.
Curbs have to be a minimum of 2" above the top of the drain and no more than 9" at finished height; this is the present code. The standard curb is 4 1/2" height, and 3 1/2" width; this is usually done by stacking 3 2x4s laid over the sub floor at the entrance of the shower pan special curbs can be done depending on the lay out of your pan.