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[CSutton]

I’m screening a small gap between my existing concrete floor in my house and new aluminium bi fold doors.
Approx 2400 x 200mm x 200mm. I’ve bought some Castle Multicem cement and coarse builders sand. Do
I need aggregate, if so what type and how much? Thanks in advance.

 

[dontbelieveawordofit]

you could add 12mm chippings to it.
dont forget to put a membrane under it .

 

[CSutton]

Thanks @bennymultifinish ! Yes have ordered some 300 micron membrane too.
Chris

 

[CSutton]

I can get 10mm shingle from the same builders?