Should I redo shower pan over concrete? Concerned about weight

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Should I redo shower pan over concrete? Concerned about weight
Author: Keneye (PA) Just gutted a shower in a 50 year old house. The old shower pan is about an inch or more of concrete. I am concerned that by adding a sloping base, membrane and then top coat of mortar, I may be adding too much weight. The shower is about 28" wide by 7'long.
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Re: Should I redo shower pan over concrete? Concerned about weight
Author: kingshakabobo (IL) Are you talking about not removing the existing concrete? If the structure is in good shape and suitable for tile, a couple hundred pounds of material should be ok. I would definitely remove all the old concrete.
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Re: Should I redo shower pan over concrete? Concerned about weight

Author: packy (MA)

do not leave the old base...
rip up to the floor joists, add bracing to make it stronger as well as nice and level.
cut out the old trap.
snake the pipe while the end is wide open.
use a sheilded no hub clamp to put a new plastic trap and riser.
new plywood glued and screwed to the joists.
leave at least a 5-6 inch circle cut out around the riser.
you now have an area that you can drive an F 450 across.

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