I have recently knocked down the wall that has enclosed the under stairs of my 1950s house since it was built. Having the walls boarded and a stud wall with doors in it. The area is approx 1.8mx0.9m.
The main issue I need to overcome is that the floor under the stairs isn't finished. There is a concrete finish, but the rest of the house has on top of that: a layer of bitumen, concrete screed (looks just like normal concrete from the edge) and magnesite, total depth about 40mm. So I have 40mm to make up under the stairs.
There's also a pit thats been left, roughly where the incoming electricity cables run. I'm not bothered about accessing that, clearly access hasnt been needed for 60 years. So I plan to fill that in with concrete, let dry, then lay a dpm over it all and lay concrete over the lot. Is this acceptable for a 40mm depth?
Should I mix quite a sloppy mix to get the surface nice? Never laid concrete indoors before. Are bags of all purpose ready mix ok for this? Total volume is under 0.08cube and the area is obviously going to be very little used, just long term storage, or the washing machine if I get my way, but in no place is the area high enough for standing up in.
Can I use a batten along the back to get a level line across? So along the edge of the finished concrete would be a length of wood, hidden under the plaster and skirting. This seems the easiest way to get it level.
The main issue I need to overcome is that the floor under the stairs isn't finished. There is a concrete finish, but the rest of the house has on top of that: a layer of bitumen, concrete screed (looks just like normal concrete from the edge) and magnesite, total depth about 40mm. So I have 40mm to make up under the stairs.
There's also a pit thats been left, roughly where the incoming electricity cables run. I'm not bothered about accessing that, clearly access hasnt been needed for 60 years. So I plan to fill that in with concrete, let dry, then lay a dpm over it all and lay concrete over the lot. Is this acceptable for a 40mm depth?
Should I mix quite a sloppy mix to get the surface nice? Never laid concrete indoors before. Are bags of all purpose ready mix ok for this? Total volume is under 0.08cube and the area is obviously going to be very little used, just long term storage, or the washing machine if I get my way, but in no place is the area high enough for standing up in.
Can I use a batten along the back to get a level line across? So along the edge of the finished concrete would be a length of wood, hidden under the plaster and skirting. This seems the easiest way to get it level.
