I’m renovating a 3rd (top) floor apartment bathroom to create a walk-in shower.
I need to create a step to elevate the floor level of the shower area to accommodate for the height of the existing shower waste drain. I was thinking of doing this using concrete. The step-up slab would be 1050 x 1820 x 125 (mm) requiring approximately 0.24m3 of concrete, about 24 x 20kg bags.
I also recently took down a partition wall and have 95 recycled bricks handy onsite. I worked out that by placing a single layer of well-spaced bricks (maintaining a 30mm spacing between each brick/wall) I could use up to 52 bricks to potentially reduce the amount of concrete I require by about 0.1m^3.
I’m hoping the experience of this reno community here can help me with the following questions:
- Is this a feasible idea?
- Would a sand-cement mix be of adequate strength? (…as I suspect aggregate may compromise the ability of the mix to flow into and around the bricks?!)
- In terms of the formwork, I suspect I should wrap the formwork around the perimeter of the slab so I can screed a clean drainage gradient – is it advisable to introduce a gap between the sides parallel to existing walls so the formwork doesn’t prevent a strong bond between the slab and the existing walls?
Cheers,
James
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