I am having an external door blocked off, and then next summer rendered over to tie in with the rest of the house which needs a few render repairs, new Bell cast, repaint etc Anyway, if the door is blocked off in Nov (I need to have it done ASAP to facilitate new fitted boiler against it etc) can the external leaf be block work and then rendered in summer 2022? Or will there be issues with wind diven rain over the winter? I queried with builder who just said "it will be completed in block with 100mm full fill cavity insulation“. Any help would be very much appreciated.