Renovation Materials Guide — What Actually Goes Into a Drywall Job

1. Drywall board

Not all board is the same, and using the wrong one is the single most common material mistake in a basement or bathroom.

Standard board

The default for walls and ceilings in dry, heated living space. Usually 1/2" on walls; 5/8" is common on ceilings because it sags less between joists.

Moisture-resistant board

Treated to handle humidity. Belongs in bathrooms, laundry rooms and anywhere that sees steam. It is not a waterproofing product — a shower surround still needs a proper tile backer.

Tile backer board

Cement or fibre-cement panel used behind tile in wet areas. Drywall of any grade is the wrong substrate directly behind a shower.

Fire-rated board (Type X)

5/8" board with a core that holds together longer under fire. Where it is required — garage-to-house walls, shared walls, ceilings under living space — is set by the building code and your permit, not by preference. Ask your inspector, not your contractor's memory.

Sound-dampening board

Denser or multi-layer panels that cut sound transfer. Worth it on a shared wall, a media room, or a bedroom next to a mechanical room. Resilient channel and insulation usually matter more than the board alone.

2. Joint compound (“mud”)

Taping compound

The strongest bond, used for the first coat that embeds the tape. Harder to sand, which is why it is not used on top.

All-purpose compound

A middle-ground mud that can do every coat. Common on smaller jobs where mixing three products is not worth it.

Topping compound

Soft and easy to sand, for the final coat only. It has little bonding strength — used for taping, it cracks.

Setting-type compound (“hot mud”)

Chemically hardens on a clock — 20, 45, 90 minutes — instead of drying. Used to fill deep gaps and to get more coats done in a day. It does not sand as easily, so it is usually under, not over.

3. Tape and bead

Paper tape

Stronger than mesh and the standard for flat seams and inside corners. It has no adhesive — it is bedded into a layer of mud, which is where most bubbling problems start if that layer is too thin.

Mesh tape

Self-adhesive and quick, best on small patches and used with setting compound. On long butt joints it is more prone to cracking than paper.

Corner bead

The strip that forms and protects an outside corner — metal, vinyl or paper-faced. Vinyl will not rust, which matters in a bathroom or a basement.

Bullnose and trim bead

Rounded corners, archways and the clean edge where drywall meets a window return or a different material.

4. Fasteners and framing

Drywall screws are sized to the board and the framing behind it — coarse thread into wood, fine thread into steel studs. Screws set too deep tear the paper and lose most of their hold; that is why a proper screw gun has a depth stop. Resilient channel, sound clips and strapping all change how the board is fixed and should appear on a quote if they are part of the plan.

5. Primer and paint

Drywall primer / sealer

New drywall is two different surfaces — paper and dried mud — and they absorb paint at different rates. Primer evens that out. Skipping it is the usual cause of “joint banding”, where every seam shows through the finished wall in side light.

Sheen

Flat hides imperfections and is the safest choice on a large ceiling. Eggshell and satin clean up better and suit hallways, kids' rooms and kitchens. The glossier the sheen, the more every flaw in the finish shows — which is also why a higher level of finish costs more.

Level of finish

Finishing is graded from a taped-only joint up to a fully skim-coated wall. A garage does not need what a floor-to-ceiling-window living room needs. If two quotes are far apart, this is very often the difference — ask which level each one includes.

6. Texture

Knockdown, orange peel, stipple and popcorn are all sprayed finishes. Matching an existing texture on a repair is a skill in itself — the mix, the tip and the timing all change the result, and a patch that is technically flat can still be obvious because the texture does not match. On a repair, ask how the match will be tested before the whole wall is sprayed.