The third is purely to stiffen walls framed on the flat.
Glue drywall to ceiling.
To install ceiling drywall start by applying adhesive to the joists where the first sheet of drywall will go.
A glue screwed wall also has greater racking strength and sound deadening ability than a screw only installation.
Next raise the drywall up with the help of a friend or drywall lift.
Standard panels come in 4 foot widths and 8 10 and 12 foot lengths.
If studding is perfectly true nailing inside field will not be required.
The adhesive must bond the drywall directly to the framing.
It cannot be used for instance where insulation batts are stapled to the faces of the studs.
Drywall adhesives should meet astm standard c 557.
Apply a continuous bead of adhesive across the top plate.
The more the drywall can be made to act like an integrated part of the framing the stiffer the wall is.
Apply a 1 4 adhesive bead to rafters.
The general rule for hanging ceiling drywall is to install the largest panels you can handle.
After the drywall sheets are up nail or screw.
The second is in some fire rated assemblies with the same basic goal.
Keeping the air from moving bay to bay helps to keep the fire from spreading bay to bay or wall to ceiling etc.
Then from the top down apply a bead to each stud stopping at your marked line.
Holding drywall s outer edges nail every 12 on outer edges and every 16 over studs in field of the panel.
Fasten center of field with nails every 16 over studs.