14-08-12, 08:44 PM
(14-08-12, 06:13 PM)manuel32 link Wrote: Any depth of bed will be strong as long as you put cement in,3 to 1 with sand or use concreteing sand,(fine gravel) with cement at about 5 to 1.
On flat areas dont lay slabs on blobs or dabs of cement , use dry mix sand cement and level out on whole area and place slabs on the flat dry mix.
oh right, i thought the bed would weaken the bigger it got due to the lack of ballast. The last patio i layed was onto wackered down MOT grade 1 stone and i layed them wet (i "spotted" them), then pointed around the edge before laying the next one (they were quite thick slabs)
I will lay these slabs wet as a good portion of the slab is onto concerete so the bond will be better. (rather than using a dry mix). the slabs are the treads on a flight of stairs.