The big problem with a solid bed and thin slabs is that when you think you've tapped them down flat, you haven't, or there's a void, or you step on one, and then once that base has set hard and the flexibility gone the slab rocks and it can't then be adjusted. Filling joints won't help as that's for block pavers not slabs. And with no joint gap getting them up is a pain and liable to damage all around the rocking slabs.
Patio slabs not sticking
- Thread starter onionsa
- Start date
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Aside from the mortar slurry hopefully fixing your little issue with unstuck/loose slabs, your general approach sounds ok, so with the addition of wetting/SBRing the back of the slabs going forward, you should be ok. Not sure what else you’re worried about.
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I like a nice wet mix for putting mine down, I find it’s easier to knock them down level.
I do them 4:1 because I can chop a bag of cement in half, chuck it in the barrow with 2 bags of ballast and it’s not too bad to mix.
I do them 4:1 because I can chop a bag of cement in half, chuck it in the barrow with 2 bags of ballast and it’s not too bad to mix.
When we laid the sandstone.few years back we used SBR and cement no water.. Painted the back of slabs let it go tacky.
Then solid bed of 4/1 50% 50% sharp/builders sand.
Then solid bed of 4/1 50% 50% sharp/builders sand.
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