repairing render in sub-zero weather?

ISTR you can get an additive for sub zero use to make it possible, but certainly warm weather is way easier if it can wait

Yes, Dryer weather as well, I'm sure a lot of others will mention sealing any joins to stop water ingress etc. After I had my house re rendered it looked like a piece of modern art with random dark bits where the joins were. This was many years ago when I could see though. Brian

You can get additives, I used it when having walls built - best wait until temp above +5C

I don't know about render, but when I built my conservatory, the brick and block-work was laid in February. I had to sweep the snow off the walls, defrost the new bricks with a blowlamp, make the mortar using hot water to defrost the frozen sand and add an anti-frost additive.

One Day in the Life of Ivan Denisovich by Aleksandr Solzhenitsyn was a fashionable read when I was a lot younger and as I recall it was a masterclass in how to build with cement and mortar in sub-zero temperatures. Can't remember a word of it but just thinking about it now makes me feel cold.

Nick