Do i need to relay new slab - Before jointng

[5han3]

Hi guys,

I am a novice at this and this is the very first time I have laid a patio. I have laid 22mm Marshalls Aluri limestone slabs (some 860x560, some 560x560) on approx. 30-50mm 4-1 cement and 75mm aggregate. I finished laying all this on Sunday and plan to joint/grout the slabs tomorrow morning.

While cutting the grass last night, I stood on one of the 560x560 slabs and it has a very slight rock from corner to corner diagonally. It does appear to be very minor, although I didn't want to really rock it to damage it further.

Do I need to take this back up and relay it, or will it be okay to just joint/grout to hold it? I am using something like Marshalls weather 365 (or something similar) to infill the gaps?

Thanks for your help in advanced.
Shane.

[r896neo]

Sorry but you need to lift and relay. There should be zero movement and if you leave it the movement will cause the pointing to fail prematurely.

[lutonlagerlout]

sounds like the mix was too dry
there should be zero movement on any flags /slabs
LLL

[5han3]

Cool I have just taken it up, broke out the cement and relaid it. Must say it took a lot of effort to hammer and chisel the cement out. Better to be safe than sorry. Thanks guys.