How many coats of primer should I put on? I am painting pink walls white.

What size of paint roller cover do I use for hand-troweled walls? I bought 3/4″ and I think it is too thick. It is a Wooster which seems good quality.

My husband and I are building our first home and in every apartment we have lived in the paint around the shower/bathtub has always “bubbled” and peeled due to water damage. How do we avoid this in our brand new home?

Have stripped the wallpaper from my two bathrooms. Underneath the wallpaper was the green board used in bathrooms for moisture. However, when I was stripping the paper I accidentally ripped some of the green board paper. What is the best way to repair this? I guess I would fill in