Hi, how do I proceed when I'm going to pour a new concrete floor? I think it was built in the 40s or 50s. It is cracked and looks terrible. It doesn't seem to be very thick, about 4 cm. I'm planning to drain the house and at the same time replace the sewage pipes, etc. How do I do it? 
Well, I'll be more or less forced to break up the entire floor. I need to install a new drain and pipes, etc. and I don't think there's a lower concrete slab, it's probably just sand or whatever is in the ground there. What happens if I break up the floor? Then the walls would be standing on nothing?
And I have a little problem. In the room, there's the house's boiler, which needs to be removed and replaced with a new pellet system. But in order to pour a new floor, the boiler has to be removed, which would leave the house without heat, the cold is coming soon, and that's not good. Then I need to drain around the basement. And replace the plumbing out to my property line. Because it might as well be done while I'm at it.
Where do I start? Dig up the pipes outside the house, then break them out from the basement floor and replace them, then remove the boiler, pour quickly, and then install the new heating system, phew! Or?
And I have a little problem. In the room, there's the house's boiler, which needs to be removed and replaced with a new pellet system. But in order to pour a new floor, the boiler has to be removed, which would leave the house without heat, the cold is coming soon, and that's not good.
Then I need to drain around the basement. And replace the plumbing out to my property line. Because it might as well be done while I'm at it. Where do I start? Dig up the pipes outside the house, then break them out from the basement floor and replace them, then remove the boiler, pour quickly, and then install the new heating system, phew! Or?
nah it won't work.. would be way too expensive. oil boiler..
would be way too expensive. oil boiler..how long is needed for a casting?
Start by calculating what it takes to tear up the floor and while you have the floor up, make sure to replace the drains and dig out a bit so you can insulate. Once this is done, it's "just" a matter of reinforcing and ordering concrete. Then the concrete should set for at least a month, so then you have a little leeway.
how deep do you need to dig out for insulation etc.! isn't there a site on how to proceed? shouldn't there be gravel or something at the bottom or sand?
isn't there faster concrete
isn't there faster concrete
How much you need to dig depends a bit on what you are going to use the room for. If you intend to heat it like a regular room, it's good to dig enough to accommodate at least 20 cm of insulation, followed by concrete. Personally, I only poured 7 cm as I believe it's sufficient for the small room without load (bathroom). But if it's a boiler room that's only going to be that, then maybe a little less insulation but more concrete will suffice.
there will only be a boiler room and a small workshop. maybe it's wise to insulate a little anyway. what happens to the walls if I dig out? if the slab is now 5cm and I dig out for insulation? won't the walls end? can you cast anyway? and should you do something special if you've had moisture problems?
and should you do something special if you've had moisture problems?The walls are cast first, so they remain unless you dig really deep. If you're worried, start with a small section and see. If you've had moisture problems, it can be solved with something like isodrän or leca balls as capillary-breaking. I personally used 20cm of isodrän so I didn't have to dig out for leca as well. And for a clean boiler room, 7.5 cm of isodrän should be enough, so you don't have to dig out so much.
Sorry but what is isodrän?! ;D sounds perfect. I'll go with that..
A manufacturer of insulation of the variant "allow moisture migration" Check out their website which isn't hard to find. http://www.isodran.se/ I think I found it on the first guess. 8) There are others of the same type, I think they are called porodrän or something.
http://www.isodran.se/ I think I found it on the first guess. 8) There are others of the same type, I think they are called porodrän or something.Super thanks!
Is isodrän expensive? What could the final cost for a room that's about 5x5 meters be with concrete reinforcement and everything?
Planning to mix the concrete myself. Does anyone know approximately!
Planning to mix the concrete myself. Does anyone know approximately!