Best fixer/cement for securing sandstone slabs onto brick garden wall?

Hi Scot, To be honest this shouldn’t be happening, sand and cement mortar is definitely strong enough to hold a slab. The only reason I can think of that this would happen is either: 1) the mortar is to the right ratio; 2) the overhang on the front of the step is too great making it a leverage point when stepped on. When I’ve had a problem like this in the past a strong clear glue product will restick the slab to the mortar bed. A product like “sticks like” or “CT1” would be ideal. Hope this helps, Ricky

Hi ... as previously said a cement motor at the right ratio should definitely be sufficient enough to hold the slabs in place. If you are to re bed them I would slurry the back of the paver and re seat them on a fresh bed.. that way you shouldn’t have a problem with them coming loose . Natural stone paving can suck up the moisture out of the cement making it dry too quick and not bond to the slab sufficiently or failing that with and easy quicker fix use pink grip. Thanks Scott

As above the correct mortor mix should be fine and also if you prime with a bridging bond/sbr slurry it will give it extra strength.

Score the bottom of the slabs with a disc cutter, and put on a layer of pva glue before you use the mortar, this will help the mortar stick to the slabs. Hope this is helpful. J.A LANDSCAPES