Joined: Aug. 2006
||Posted: 29 July 2019,12:52
I am planning on overlaying some existing concrete to the rear of my house. Existing concrete is a bit patchy, but I don't want to replace it all for a 'proper' job as we are hoping to have the money to build an extension in 3 or so years time. So this overlay is just to make it look a bit better for a while, and doesn't have to last a lifetime.
There is currently an exaggerated slope on the drive and I also want to reduce this by taking up approx. 4" over about a 8 foot distance.
I was planning on isolating from the existing concrete with visqueen and using a sub base to take up the excess fall.
I am after some advise on the following please (all welcome)
- What would the sub base need to be, would sharp sand be enough ?
- Should the order be visqueen, sub base new concrete, or sub base, visqueen - new concrete ?
- How thin could I go with the new concrete layer. It will have cars driving over it
- What would be the best mix to use for the new layer ?
- At some points it will be between a garden wall & house (about 16' apart), will it need expansion gaps at each end (old concrete currently butts up to both)
I plan to put a colour into the mix, and maybe do some bands of decorative aggregate floated into the surface to break it up a bit.
Not sure yet if I'll mix myself, or get ready mix delivered ( I have a hand me down full bag diesel mixer my Dad bought in 1965 !)
Thanks in advance for any replies