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Hard to know without more details. I would speak to my builder for exact details but I suspect put stones down over the whole are to a level which suits. Then sand and pave on top of the stones. You may have to dig out the pice which isn’t concrete to get a adequate foundation. That’s my opinion - and I’m not in the trade.
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How deep is the existing slab? And how shit is it?
If it's fairly deep and in decent shape, you could stick some steel dowels (old bit of rebar will do) in and cast concrete on top of it. Roughen, clean then wet the existing before casting on top.
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I’m having a concrete slab laid next weekend. It’s 4.5m x 2.2m
Labour is £750 and includes the shuttering wood.
Materials are another £300.
It’s not cheap getting concrete down.
TGR
jbwilliamz
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@chrisbmx116
Concrete slabs, talk to me...
There is an old shit one at the back of my garden, I extended it with tiles when we first moved in to create a larger area for shed and dining table (it was previously just a large shed in the centre I would guess).
I want renovate the whole area a bit more properly and wondering what my options are. The end goal is to have a slightly higher (half a foot higher) area with concrete slab top to match the patio bit connected to the house.
Will I really have to dig it all up? Can I be cheeky and slab over slab? Google brings up lots of quite complicated looking methods involving bonding layers.