A bad paint job is usually a bad drywall finish underneath. The drywall took two coats instead of three, the painter rolled an eggshell over it, and morning sidelight lit every seam like a runway. The Gypsum Association’s GA-214 standard names six finish levels (L0 through L5) and tells you exactly which one fits which room. Most homeowners never hear the conversation.

“Level 3 is for textured walls only, but most contractors finish to L3 and bill for L4.”

Level 0: Hung, Nothing Else

Sheets on the studs, screwed off, no tape, no mud. You’ll see L0 during inspection holds or when another trade still has to run conduit through a wall. It’s fine as a stage. It is not a delivered wall. Our drywall hanging page walks through this step.

Level 1: Tape Embedded, That’s It

One coat of mud embeds the joint tape. Screw heads and corner bead can stay bare. Ridges and excess mud are allowed. L1 belongs in concealed spaces (above suspended ceilings, mechanical chases, attics) where the taped joint keeps the fire-rated assembly intact. If anyone ever looks at the wall, L1 is the wrong spec.

Level 2: One Skim Over Tape and Fasteners

L1 plus a single coat over tape, fasteners, and accessories. Tool marks are still acceptable. Right home for L2: garages, mechanical rooms, water heater closets, tile backer board, and warehouse walls getting a block-fill primer. If a contractor quotes L4 for your detached garage, ask why.

Level 3: Two Coats (Textured Walls Only)

Two coats over tape, two over fasteners, sanded between passes. The Gypsum Association is clear: L3 is intended for surfaces receiving a heavy texture (orange peel, knockdown, popcorn). Central Ohio walls are smooth by default now, so L3 should be rare here. It isn’t. Crews finish to L3 because it’s faster, then a painter rolls eggshell over it, and the homeowner pays for it when the sidelight shows up.

Level 4: Three Coats (Residential Standard)

Three coats over tape, three over fasteners and accessories, sanded smooth. No tool marks, no ridges. L4 is the right spec for smooth residential walls and ceilings painted in flat, matte, or eggshell. When we patch a hallway, we feather the repairs out until they read as L4 against the surrounding wall. That blending step is what drywall finishing actually means.

Level 5: Full Skim Coat (Critical Light)

L4 plus a skim coat (or a high-build primer/skim product) across the entire face of the drywall. The whole paper, not just the joints. L5 is required for gloss and semi-gloss sheens, dark or saturated colors, and any wall hit by raking sidelight, wall washers, or cove lighting. Skip L5 under those conditions and the sheen turns every joint into a soft shadow line.

The Six Levels at a Glance

The Sidelight Test You Can Do Yourself

Before you sign off on a wall, kill the overhead lights and open one curtain on a sunny day (or hold a work light parallel to the wall, six inches off). Look down the wall along its length, not straight at it. You’re scanning for shadowed seam lines, halos around screws, trowel curves, and sandpaper swirls. If raking light shows any of that, you’re looking at L3 work. For L5, you should not be able to tell where the paper ends and the mud begins.

“Ask any contractor: what level of finish are you delivering, and how will I verify it under sidelight?”

The level conversation is the single biggest predictor of how a paint job ages. It also touches the work next door. If you’re planning a trim repaint or a cabinet refinish, the wall plane behind that trim or those cabinets has to read L4 minimum (L5 if the cabinets are sprayed in a high sheen). For full-room prep specs, our paint prep and repairs page covers what gets done before color. For patch work, see drywall repair. For the full service overview, the drywall services hub ties it together. The current GA-214 PDF lives here if you want the source document.