The Complete Guide to Drywall and Plastering Tools — Achieving Smooth, Professional Walls and Ceilings

The Two Approaches — Taping and Jointing vs Skim Plastering

There are two common methods for finishing plasterboard (drywall) to a smooth, paint-ready surface. The tools differ between them.

Taping and jointing uses paper or mesh tape and joint compound (often called "mud") to fill and conceal the joints between plasterboard sheets. Multiple thin coats of compound are applied with taping knives, each coat wider than the last, feathering the edges to blend invisibly into the surrounding board. The surface is then sanded smooth. This is the standard method in many regions and is the more accessible technique for homeowners.

Skim plastering applies a thin coat of finishing plaster over the entire surface of the plasterboard using a plastering trowel and hawk. The plaster is mixed from powder, applied wet, and trowelled smooth as it sets. Skim plastering produces an exceptionally smooth, hard surface but requires more skill and speed — plaster sets within a limited working time, and the entire surface must be finished before it hardens.

Both methods produce professional results when done well. Taping and jointing is more forgiving (compound can be sanded and recoated if mistakes are made); skim plastering requires more confidence and speed but produces a superior surface in fewer steps.

Taping Knives — The Essential Drywall Finishing Tool

Taping knives (also called joint knives, filling knives, or drywall knives) are flat, flexible blades with handles, used to apply, spread, and smooth joint compound over plasterboard joints, screw holes, and repairs.

Narrow taping knives (100–150 mm / 4–6 inches) are used for the first coat — embedding tape into the compound over joints, filling screw depressions, and covering narrow areas. A 150 mm (6 inch) knife is the most versatile size for first-coat work and general repairs.

Wide taping knives (250–300 mm / 10–12 inches) are used for second and subsequent coats — spreading compound in a wider band that feathers the edges smoothly into the surrounding surface. Each coat should be wider than the previous one, gradually blending the joint into invisibility.

Blade material matters. Stainless steel blades resist rust and are easy to clean. Blue steel (carbon steel) blades are slightly more flexible and preferred by some professionals but require more care to prevent corrosion. For homeowners, stainless steel is the most practical choice.

A slight curve (crown) in the blade helps produce a smooth finish. The convex side of the blade faces the wall during application, and the raised centre prevents the blade corners from digging into the compound and leaving tool marks. Many knives come with a slight factory crown; if not, a gentle bend over a rounded surface creates one.

Round the blade corners with a file before first use. Sharp corners dig into the compound and leave marks that require additional sanding.

Hawks and Mud Pans — Carrying the Compound

A hawk is a flat square platform (typically 300–350 mm / 12–14 inches) with a perpendicular handle underneath. You hold the hawk in one hand and load it with compound or plaster, then scoop material from the hawk onto the taping knife or trowel with the other hand. The hawk provides portability — you carry your working material with you as you move along the wall, reducing trips back to the bucket.

A mud pan is a long, narrow metal tray that holds compound. You dip the taping knife into the pan to load compound and scrape the back of the knife against the pan's straight edge to clean excess material. Mud pans are easier for beginners than hawks — there is less technique involved in loading the knife from a pan than from a hawk.

Metal mud pans are preferred over plastic. Metal pans have straighter edges (for cleaner knife scraping), are more stable (less likely to flex), and are more durable. The straight edge of the pan also serves as a scraper for cleaning compound from the knife between passes.

Hawks are used primarily with plastering trowels for skim plastering; mud pans are used primarily with taping knives for jointing. Both are used for the same fundamental purpose — holding compound where you need it.

Plastering Trowels — Applying and Smoothing Plaster

A plastering trowel is a flat rectangular steel blade (typically 280 × 120 mm / 11 × 5 inches or larger) with a handle on the back. It is the primary tool for applying and smoothing wet plaster during skim plastering.

The trowel pushes plaster across the wall in a thin, even layer. The angle of the blade to the wall controls the thickness of the application — a steep angle deposits more plaster; a shallow angle spreads and smooths. Mastering this angle is the central skill of plastering.

Finishing trowels have a slight curve in the blade and are used for the final smoothing passes as the plaster begins to set. The curve prevents the blade edges from digging into the setting plaster.

Smaller trowels and margin trowels (narrow, pointed blades) are used for detail work — around windows, doors, corners, and edges where the full-size trowel cannot reach.

Trowel quality directly affects the finish. A quality trowel with a flat, ground blade and a comfortable handle produces a smoother result with less effort than a cheap, warped trowel. Stainless steel trowels are easier to clean and maintain than standard steel.

Corner Tools — Internal and External

Internal corner trowels are V-shaped metal blades that smooth both sides of an inside corner simultaneously. Without a corner trowel, each side of the corner must be finished separately — a process that risks damaging the adjacent side with the edge of the knife.

External corner trowels are used to finish the compound over external corner bead (the metal or plastic angle strip that reinforces and protects external corners). The trowel wraps around the corner, smoothing both faces in a single pass.

Corner tools are not essential for small repairs but significantly improve speed and quality when finishing rooms with multiple corners. For a single patch repair, a taping knife used carefully can produce acceptable corner results.

Mixing Tools — Paddles and Drills

Joint compound and plaster must be mixed to a smooth, lump-free consistency before application. Pre-mixed compound from a tub still benefits from mixing before use to ensure consistent texture throughout.

A mixing paddle attaches to a power drill and spins rapidly through the compound or plaster, breaking up lumps and producing a uniform, workable consistency. Paddles come in various sizes — a smaller paddle suits a standard household drill; larger paddles require a more powerful mixing drill.

For mixing plaster from powder (which must be mixed fresh before each application), a mixing drill with a paddle is virtually essential — hand mixing cannot achieve the smooth, consistent texture required for a good finish.

Mix in a clean bucket. Residue from previous batches causes lumps and accelerates setting in fresh mixes. Clean all mixing tools and buckets thoroughly after each use.

Sanding Tools — Achieving the Final Finish

After each coat of compound has dried, sanding removes ridges, tool marks, and high spots to produce a smooth surface ready for the next coat or for painting.

Hand sanders hold a sheet of sandpaper or sanding mesh flat against a pad with a handle. They provide controlled, even sanding pressure across a flat surface. Sanding mesh (open-weave abrasive) is preferred over sandpaper for drywall work because it does not clog as quickly with the fine dust produced by compound.

Pole sanders attach a sanding pad to a long pole, allowing you to sand walls and ceilings from the floor without a ladder. The pivoting head maintains flat contact with the surface as you sand in long, sweeping strokes.

Sanding sponges are flexible abrasive blocks that conform to curved and irregular surfaces. They are particularly useful for sanding inside corners, around edges, and in areas where a flat sander cannot reach.

Dust is the major challenge. Sanding compound produces enormous quantities of fine, pervasive dust. Wear a dust mask (at minimum) or a respirator, seal adjacent rooms with dust sheets and tape, and consider a vacuum sander attachment that connects to a shop vacuum and captures dust at the source.

Cutting and Fixing Tools — Board Preparation

A utility knife scores plasterboard for snapping along a straight line. Score the face paper, snap the board along the scored line, then cut the back paper to separate the pieces cleanly. No power tools are needed for straight cuts.

A plasterboard saw (a short saw with a pointed tip) cuts openings for sockets, switches, and pipes by plunging the point into the board and sawing along the marked line.

A drywall square (a T-shaped measuring and cutting guide) provides a straight edge for scoring cuts across the full width of a standard board.

A screw gun or cordless drill with a dimpler bit drives plasterboard screws to the correct depth — flush with the surface without breaking through the face paper. A dimpler bit stops the screw at the right depth automatically, preventing over-driving.

Tape, Compound, and Plaster — The Materials

Paper joint tape is the traditional choice for taping joints. It is embedded into a bed of wet compound, then covered with additional coats. Paper tape is strong, provides excellent crack resistance, and produces invisible joints when properly applied. It requires compound underneath to adhere.

Self-adhesive mesh tape sticks directly to the plasterboard surface before compound is applied over it. It is easier for beginners (no wet bedding step) but is slightly more prone to cracking than paper tape and requires more compound to produce an invisible finish.

Joint compound (all-purpose) is pre-mixed and ready to use from the tub. It is suitable for all coats — bedding, filling, and finishing. It dries by evaporation and can be sanded smooth.

Setting compound is mixed from powder and sets by chemical reaction rather than evaporation. It sets faster (available in various setting times from 20 minutes to several hours), is harder when set, and is preferred for filling deep voids and building up thick areas where all-purpose compound would shrink.

Finishing plaster is a gypsum-based powder mixed with water for skim plastering. It sets within a limited working time (typically 30–60 minutes) and requires confident, efficient application.

Comparison Table

Common Mistakes People Make

Applying compound too thick

The most common beginner mistake. Thick coats shrink as they dry, crack, and take far longer to dry and sand. Apply multiple thin coats, allowing each to dry fully before applying the next. Three thin coats produce a better result than one thick coat — with less sanding, less cracking, and less frustration.

Sanding too aggressively

Aggressive sanding cuts through the compound into the tape or the plasterboard face paper, creating damage that requires more compound to repair. Sand lightly with fine-grit mesh (120–150 grit for finishing), using smooth, even pressure. The goal is to level ridges and tool marks, not to remove large amounts of material.

Not cleaning tools between uses

Dried compound on taping knives, trowels, and mud pans contaminates fresh compound, creating lumps, lines, and an uneven finish. Clean every tool thoroughly with water after each session — dried compound must be scraped or soaked off, which is far more effort than cleaning while wet.

Mixing plaster too wet or too dry

Plaster that is too wet is runny and slides off the wall. Plaster that is too dry is stiff and difficult to spread smoothly. The correct consistency — thick enough to hold its shape on the hawk but smooth enough to spread easily — comes from careful, gradual mixing. Add plaster to water (not water to plaster) and mix thoroughly.

Trying to finish the job in one coat

Drywall finishing is a multi-coat process. The first coat embeds the tape and fills the joint. The second coat widens the application and begins the feathering. The third (and sometimes fourth) coat produces the final smooth surface. Rushing the process into fewer coats produces visible joints that no amount of paint conceals.

The Honest Limitations

Drywall finishing and plastering require patience and practice. The tools are straightforward, but the technique takes time to develop. Expect imperfect results on your first attempt and improvement with each subsequent job. Practise on a scrap piece of plasterboard before working on visible surfaces.

Dust is unavoidable during sanding. Sanding drywall compound produces fine, penetrating dust that settles on every surface in the area. Seal adjacent rooms, cover furniture and floors, and use a dust mask or respirator. Vacuum sander attachments reduce but do not eliminate dust.

Skim plastering has a steep learning curve. The limited working time of setting plaster means you must work quickly and confidently — there is no opportunity to stop, assess, and restart once the plaster begins to set. For beginners, taping and jointing is the more manageable approach; skim plastering is best learned through hands-on practice or instruction.

Quality tools make a measurable difference. A cheap taping knife with a warped blade and rough edges produces tool marks that require extensive sanding. A quality knife with a ground, crowned blade produces a smoother finish with less effort. The investment in good tools pays for itself in reduced labour and better results.

Pre-Purchase Checklist

What work are you doing?

Patching a hole or repairing a crack: a 150 mm taping knife, a small tub of all-purpose compound, paper or mesh tape, and a sanding sponge. Finishing a full room of plasterboard joints: 150 mm and 300 mm taping knives, a metal mud pan, a mixing paddle, compound, tape, and sanding equipment (hand sander or pole sander). Skim plastering an entire room: a plastering trowel, a hawk, a mixing paddle with a powerful drill, finishing plaster, and sanding equipment.

Do you have adequate dust protection?

Dust mask or respirator (essential). Dust sheets for floors and furniture. Masking tape for sealing door gaps. Consider a vacuum sander attachment for large jobs.

Have you practised the technique?

If this is your first drywall or plastering project, practise on a scrap piece of plasterboard before starting on visible surfaces. The tools are simple; the skill is in the application.

Why Buying Through Amazon Is a Smart Option

Amazon carries drywall and plastering tools from every major manufacturer — taping knives, trowels, hawks, mud pans, mixing paddles, sanders, and sanding accessories — alongside joint compound, tape, plasterboard screws, and dust protection equipment. Customer feedback provides practical insight into blade quality, handle comfort, and real-world durability. Free returns on most purchases allow you to check tool quality before committing to your project.