Drywall
CSI Division 09, Finishes
Gypsum board panels installed over framing (wood or [[concept-metal-studs|metal studs]]) to form a building's interior wall and ceiling surfaces, then taped and finished with joint compound to create a smooth, paintable surface.
Why it matters
Drywall installation quality shows up immediately and unavoidably once painted: every framing flaw, seam, or fastener that isn't properly finished telegraphs through the paint under the right lighting, making drywall finish one of the most visible measures of overall construction quality to an occupant.
On a real project
A drywall crew hangs gypsum board over metal stud framing, then applies multiple coats of joint compound over the taped seams, sanding between coats until the wall reads as one smooth, continuous surface once primed and painted.
Who this matters most to
A Drywall Installer hangs and finishes drywall, work that depends heavily on the framing underneath already being straight and properly spaced. A Painter inherits whatever quality the drywall finish left behind, since paint doesn't hide flaws; it reveals them under raking light.
Where this goes wrong
A drywall crew works over metal stud framing that's slightly out of plumb in several spots, and rather than flagging the framing issue, they try to compensate by building up extra joint compound to hide the unevenness. Under certain lighting after painting, the wall's surface still reads as visibly wavy, a flaw traceable back to framing that should have been corrected before drywall ever went up.