Hi, need a little help with my basement conversion.
Got the cavity drain membrane in and floor is all sorted (50mm kingspan and chipboard on top)
Am about to start drylining the place and I've never done it before.
My first questions are about the ceiling; I'm thinking of double boarding with 12.5mm boards.
1. Should I use tapered or straight edge boards?
2. Do I need to tape and fill the joints on first layer of boards before putting the second layer up?
3. When I'm putting up the second lot of boards do I stagger the joints in relation to the first set or do I just put them up straight over the first set?
4. Would 40mm screws for the first boards and 70mm for the second lot be appropriate?
Thanks for your help!