Only last wek we were saying about the absence of rain. Our 450 gallon water butts which come off our garag roof were empty and i loath to use tap water for garden etc. Anyway i deceided to regrout the paving slabs and as the weather last Thursday was very hot i got stuck in, the material i used was one from Screwfix which has to be left for about 48 hours to fully set.So Sunday having done about 90 odd slabs the weather changed and by 1500 it was bucketing down. I put a cover over half of them but had to rush out to B&Q to buy couple more sheets. Today where it has still been raining the water has overflowed the edges and got to the tiles. I fear the worse and will tape my mouth up in future.