I had installed a modular shower unit in my home once and the instructions said not to chalk the bottom to allow for expansion and contraction. The shower base should have a high "lip" the the walls fit over. It should be high enough that the water should not be able to get up and over behind the wall.
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"PT Crew Members Since 9/2010"
2011 RAM 2500 HD 6.7L CTD Crew
2014 Prime Time Sanibel 3250
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