Shower drain concrete slab issue
#1
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Shower drain concrete slab issue
I have attached a picture of a hole that we have in our concrete slab in our bathroom. [ATTACH=CONFIG]34817[/ATTACH]
I've just taken out an old ceramic shower from my bathroom and will be installing a new walk in shower over this area with the hole. The hole is about a foot and a half square. We'll be using one of those pre-fab shower bases like KBRS and then tiling over it (the shower base will be about 3.5 feet by 5 feet.
My question is, do I need to fill in this hole with new concrete or will the shower base be solid enough that it can rest on the existing concrete without a problem.
If I do need to fill it in with concrete, what is the best way to handle the shower drain (which will be replaced)? I was thinking of installing the base of the new drain before pouring the new concrete and having it just above the level of the concrete (maybe a quarter of an inch) so that I can put in some self leveling material after and have everything flush.
Thanks
I've just taken out an old ceramic shower from my bathroom and will be installing a new walk in shower over this area with the hole. The hole is about a foot and a half square. We'll be using one of those pre-fab shower bases like KBRS and then tiling over it (the shower base will be about 3.5 feet by 5 feet.
My question is, do I need to fill in this hole with new concrete or will the shower base be solid enough that it can rest on the existing concrete without a problem.
If I do need to fill it in with concrete, what is the best way to handle the shower drain (which will be replaced)? I was thinking of installing the base of the new drain before pouring the new concrete and having it just above the level of the concrete (maybe a quarter of an inch) so that I can put in some self leveling material after and have everything flush.
Thanks
#3
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Even if the instructions don't give a clear answer I would fill the hole. Concrete would be best but you could probably also use thoroughly compacted stone/gravel. I don't like leaving any part of a shower pan unsupported and especially not the drain area. Any slight movement between the shower pan and drain pipe could eventually cause it to leak so I want it rock solid.