Loose patio slabs

Probably the builder you use it before , he didn’t mix mortar good , or he didn’t use the compactor to have a solid base

Absolutely. You could understand if it had been a fair few years since it had been done, but last year? There is no reason them slabs should be moving at all. You are well within your rights to call him, and if he is a decent tradesmen he will correct for free of charge.

Hi yes call the person who did the job If they have any pride in their work should sort it out immediately. I know I would.

From what I have seen befor it could be the course off the cement been too sandy witch means over time it can crumble witch would course to be wobbly thanks

Sbr and cement mixed will stick it down the backs of the slabs are best primered to stop this happening.

Yes I would call him back and politely ask for him to pop back and sort them out. It's a five min job and any good landscaping firm or groundworks company will be happy to do it.

Hi Richard Yes you certainly are with in your rights to call him back and any self respecting landscaper would return. It should only take him half an hour or so to fix, lift the slab, break out the mortar underneath and lay fresh a fresh mix, re-lay the slab and point up. The reason possibly the slab did not adhere to the mortar, or the pointing was loose and moisture got under and froze in the winter, which would lift the slab. Regards. Tim Archer

In my opinion the motar on those slabs hasn’t taken to the stone as it should. It could be that there are some air pockets in the motar under the slab causes it to loosen. I think it’s perfectly reasonable to get him back to set them again.

It happen sometime with natural stone if dry pointing in and they moved a bit before this can then break up around stone always use wet mix so it goes under and around the stone ,so call him back if he’s a good person not a problem to fix.,

Did you ring the builder 1st before posting question on here?.... I’m sure he would love to come out and rectify the small problem!

Indian stone sucks the moisture out of the concrete very quickly especially on a hot day. I paint a slurry mix on the back of each slab as I lay them this helps but not always guaranteed once in a blue moon unfortunately one might come loose