Drywall, plaster and ceilings

Sheets for walls and ceilings and the reverse question of how much wall a delivery covers; jointing tape and compound by finish level; three-coat stucco and the lath behind it; and suspended ceiling tiles by module.

The finish level, which nobody asks for until the light goes on. Level 3 under a textured finish and level 5 under a gloss in raking daylight need the same sheets and very different quantities of compound — two coats against four, plus a skim — so the pages ask for the level rather than averaging it.

The framing behind the board and the insulation in the cavity, both of which are fixed before any of this starts.