Laying Patio Slabs for the first time.

naraic90

Hi,

I was wondering if anyone would have any advice, I want to extend a patio slabs in the back garden of a new build house, they are 600x400 slabs. I was under the impression I'd need hardcore, compact it and then a cement bed for the new slabs.

I took one up to bring it to match to the new ones and noticed they aren't on a bed of concrete. Would anyone know what's the substance under them and is it substantial if the slabs are just for walking on or should they be on a bed of sand and cement?

Any advice for laying new ones for joining into the existing patio/concrete path around the edge?

Thanks in advance.

noodler

Dele

10-10-20

That's the bedding layer and in some cases it is a coarse grit sand over a sub-base of larger crushed stone. If you dig down a small bit you should find the sub layer.

Have a read of this resource as cement bound aggregates are not always used.

https://www.pavingexpert.com/layflag1#construction

geographica

https://www.boards.ie/discussion/2058351565/laying-patio-slabs-for-the-first-time

I’d say that’s a layer to bed them on but there’s probably 804 hardcore underneath, packed down with a whacker plate

alias no.9

804 hardcore compacted, topped sharp sand to bed the paving on

Muas Tenek

https://www.boards.ie/discussion/comment/122135474#Comment_122135474

Or quarry dust for bedding on.