How to level a patio

Question

Part of our existing patio has sunk slightly and collects water after rain. Can individual slabs be lifted and relevelled or does it need to come up completely?

Ellis · Answer

there are ways to lift a slab out and re level the slab. if its sunk it may mean proper foundations were not completed prior to work or that it is not sat on apprpriate ratio of sand and cement. start by removing grout from around slab unless they are buttered. i would remove a few around it also then chisel ild cement base away before relaying on new 4 to 1 mix and use a spirit to ensure they butter with the existing slabs. hope that helps

Blerim · Answer

in many cases, individual patio slabs can be lifted and relevelled without rebuilding the whole patio. Whether that’s enough depends on why the area sank and how widespread the movement is.

David · Answer

depends on how large of an area is sunk inwards. if there is a small area possibly be ok but if its in the middle or in various areas on the patio, it will need to and be redone.

Alan · Answer

Depending on how deep lift and screen some sharp sand in

Graham · Answer

If it’s just a section that’s sunk and holding water, you don’t normally need to rip the whole patio up. In most cases you can lift the affected slabs, clean out underneath and re-bed them properly. What’s usually gone wrong is the base has either settled or wasn’t compacted enough in that spot, so water is sitting and dragging it down over time.

From a proper job point of view, you’d lift the slabs in that area, dig out and re-level the sub-base, then re-compact it properly (that’s the key bit most people skip), add a sharp sand or mortar bed depending how it was originally laid, and relay the slabs so they fall slightly away for drainage.

You only really need to take the whole patio up if the base is generally failing across a wide area or everything’s moving, but if it’s just a localized
 dip, it’s normally a targeted repair rather than a full rip-up.

Dean · Answer

Take up existing slabs check if the sub base is ok you may need to dig out and stone up and re bed slabs on a full muck bed

Gem · Answer

Rebuild the foundation with compacted sub-base and fresh sand, then lay and lock the stones back into place. [1, 2, 3, 4]

Steven · Answer

You should be able to grind round the outside of the slabs, lift them then relevel the type 1 etc then pop the slabs back in.

Mark · Answer

Depends how bad they have sunk an depends how big the area is, if it is a couple of slabs, yes you can lift individual hope this helps

Wojciech · Answer

All depends how big is the affected area and firstly you need to find out why it happened and sort it out.Its washed out could mean that water is running below it. To stop that you need find the cause of that.

How to level a patio

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