Hi All A bit of advice if I can. I painted an outside workshop a few weeks back with a water based masonry paint. The building is rendered block, built ages ago. It already had a masonry paint on the walls which looked sound (no peeling/ flacking). So here is where you will point out I went wrong. I jet washed the walls to get rid of dirt and any green algae(?). Waited for it to dry and then applied a couple of coats of masonry paint allowing drying time between. At the time the weather wasn’t ideal, day time temperature probably below 8c, night time 0 and below. Anyway 2 or 3 weeks later the paint is flaking, very small bits (at which point you are thinking that was bound to happen). Not what I would call peeling. More of a problem on one of the 2 walls. On the other one more of a problem lower down. Anyway I could probably wire brush the lot off with minimum effort or even blast it off with my dreaded jet wash. I am inclined to do the later to take me back to the original sound coat and start again in warmer times. I don’t think it needs to be sealed as the original paint is doing that fine? What do you advise. Be kind.