Fill gaps/screw heads etc with thinset before
Redgard? - I'm using a backerboard. Easyboard, apparently aka Wonderboard.
http://www.custombuildingproducts.com/TDS/TDS-104.pdf I know some recommend Hydroban but I can't get it where I am.
It seems a little unclear on this. As for "joints designed to move," does that mean corners, or joints in boards? All my joints are supported by blocking. I've actually read online that some people suggest no mesh, no thinset in gaps in corners (I'm assuming inside corners, don't know the deal with outside corners)
The corner thing makes sense since I'm transitioning to existing drywall. I figure I'd use silicone in the gap between the drywall and backerboard, which will be covered by tile. When grouting time comes, either caulk or use silicone in the corner, to allow for movement.
Here is a link that might be useful: Redgard