Hi, I've just had a new patio laid about 3 weeks ago. The pointing was done on a fairly hot day, if that makes a difference? I have now noticed that around some of the slabs the pointing is cracking. Would anyone know if this is as a consequence of them being laid in the heat or just the cement drying out too quick in the hot weather of the last few weeks? Or, of course, a ropey job by the builder. Any feedback would be much appreciated before I ring him and get him back, thanks in advance