I've recently had a water leak in my shower upstairs which damaged my ceiling downstairs I've had the area cut out reboarded and replasterd please could u tell me if I need to prime the newly plastered patch before I paint the whole ceiling and if so please could u recommend a quality primer please
Yes prime with emulsion and water mixed together
Yes, you need to prime the newly plastered patch before painting. Use a "mist coat" (a diluted emulsion paint) or a dedicated primer like **Zinsser Bullseye 1-2-3** for best results.
Yes it is advisable because if you don't the pait will not adhere to it and it will peel flake and cause more issues in the long term.
Yes you would need to prime the newly plastered patch before painting.
I would recommend using a bare plaster primer.
Just use watered down emulsion as a mist coat , you want it to soak into the new plaster and not just sit on top