Laying Patio Slabs Drainage pipes, concrete, footings and foundations. Post your questions and find answers here

[slaphead]

Hi
I want to lay slabs on top of old crazy paving that has been down for years,The area is quite flat and drains well and I dont want to take up the crazy paving,I would like some advise on how to prepare the area and what mix to use.
Thanking you in advance.
Roger.

[stoneyboy]

slaphead,
Assuming foot traffic only use dobs of a 4:1 sand cement under the new slabs. Grout the joins after set with the same mix.
end

[elwood]

Hi

If your are inexperienced at laying slabs the best method is,

find the highest point on the existing patio, this will be your starting level.
set up some screed rails allowing a 30mm bed above your highest point,
allow for falls required.
mix sharp sand and cement 4 to 1 mix (put through a mixer)slighty damp.
roughly spread the mix around, then level off by dragging a straight rail
over the screed rails leveling the mix .
lay slabs.
if pointing is required use 4 to 1 mix including fed mix and building sand
just mix workable amounts at a time making sure you gauge the mix every time.

Be aware of your new finished level and DPC on your house