Jonstar
Mar 20, 2008, 09:32 PM
Hi all... I'm starting my project in a couple weeks and I'm trying to make sure I have all my bases covered.
I will be breaking up some concrete floor and running new drainage beneath it. There are some things I wanted to be sure of:
1) When I run the pipes, it should be sloped so that every foot or so it runs down 1/4" to the ejection pit. Is this correct?
2) I will be putting back the fill I removed then pouring concrete over top. What is the best concrete ix to use? A sand mix or just anything?
3) When I pour, is it ok that I cement right up to all the drains/vents coming out of the floor except for the toilet which I must have some sort of foam to help when I install the flange? What would be recommended here?
4) I sit on an area with springs in the ground and have an average water table. When I pour the concrete to fill the trenches how can I do this to be sure I will not see any leaking of water through the seam (where the new pad meets the old)? Should I maybe pour the new concrete a little lower than the existing pad and "flare" it out so it catches it? My concern is I will either have water leak in or the ground could shift and cause the concrete to lift slightly messing with a rather level floor.
Any help with these questions would be great!
Thanks.
I will be breaking up some concrete floor and running new drainage beneath it. There are some things I wanted to be sure of:
1) When I run the pipes, it should be sloped so that every foot or so it runs down 1/4" to the ejection pit. Is this correct?
2) I will be putting back the fill I removed then pouring concrete over top. What is the best concrete ix to use? A sand mix or just anything?
3) When I pour, is it ok that I cement right up to all the drains/vents coming out of the floor except for the toilet which I must have some sort of foam to help when I install the flange? What would be recommended here?
4) I sit on an area with springs in the ground and have an average water table. When I pour the concrete to fill the trenches how can I do this to be sure I will not see any leaking of water through the seam (where the new pad meets the old)? Should I maybe pour the new concrete a little lower than the existing pad and "flare" it out so it catches it? My concern is I will either have water leak in or the ground could shift and cause the concrete to lift slightly messing with a rather level floor.
Any help with these questions would be great!
Thanks.