Laying flags on soil

Question

What is best to put underneath flagstone when placing them onto an old lawn. I have removed the turf already, but unsure of what to lay underneath the flags?

Tony · Answer

You will need a sub-base of mot type 1 about 4" to 6" depending on traffic over the top of the flags.

Danny · Answer

If you want the patio to last as long as possible you will need to lay a good membrane, then lay and compact some type 1 hardcore and then the same with sharp sand. You will need a good sub base if it is a high traffic area or you will end up with movement and subsidence over time.

Jack · Answer

Hi, the best is type 1 stone, laid and compacted, at least 100mm deep.

Marie · Answer

Type 1 mot. Hardcore then compact with a Wacker plate, then lay on a full wet cement bed or sand and cement mix.

Joshua · Answer

For flagstones, you have to put a membrane down and then lay the stones in place.
Thanks

Jason · Answer

You need to put type one down and compact it before you lay any slabs on it or they will just subside over time.

Luke · Answer

I use type one down then go over it with whin dust or sharp sand won't  move

Tamoor · Answer

You need to at least put down a membrane, it’s like a plastic material and or also some sand, ask any good builder's yard for sand to put down under flagstone or slabs and they’ll get you some for your project.

Bobby · Answer

You should dig out an extra 100mm to allow for a 50mm sub base use mot type 1 and a mortor bed of 50mm to secure the slab from movement

David · Answer

Aggregate base and membrane is needed to lay a patio on.

Laying flags on soil

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