Domakihub How to Tape and Joint Plasterboard for a Smooth Finish
Master the two-coat jointing method and avoid the cracks, ridges, and shadows that ruin a paint job.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
Taping and jointing is the skill that turns a boarded wall into a paint-ready surface without the cost of a full skim plaster coat — making it the go-to finishing method for holiday rentals, offices, and hotel rooms across Greece where turnaround time matters. The video above walks through the full trade process in real time; the steps below break it down into a clear sequence you can follow before, during, and after the work. Whether you are doing this yourself or briefing a tradesperson, understanding the process will help you get a finish that stays crack-free through the Greek summer heat cycles.
What Is Tape-and-Joint, and When Is It Used?
Tape-and-joint — also called dry-lining or taping-and-filling — is a method of finishing plasterboard joints using jointing compound (also sold as drywall mud or filler) and a reinforcing paper or mesh tape, rather than a traditional wet plaster skim coat. The result is an invisible joint that can be sanded smooth and painted directly, or given a thin finish coat if preferred.
This method is common in partition walls, stud walls, ceiling linings, and plasterboard dry-lining over masonry. It is standard in the UK and widely used in Greece for fast renovations. It is not a substitute for licensed plastering where fire-rating specifications or structural systems require it — check your building permit conditions if you are constructing a new partition in a commercial space.
Tools and Materials You Will Need
Before you start, gather the following: jointing compound (pre-mixed or powder — pre-mixed is easier for beginners), paper jointing tape (preferred over fibreglass mesh for flat joints; mesh is acceptable for corner bead backing), a 150 mm / 6-inch filling knife, a 250–300 mm / 10–12-inch broad knife or feather knife for the finishing coats, corner bead and corner tape for external angles, a sanding sponge (fine grit, wet-dry rated), a bucket of clean water, and a bright work light. A headlamp held at a raking angle is the single most useful tool for spotting ridges and hollows before you sand — work without it and you will miss imperfections that show up the moment paint goes on.
How to Tape and Joint Plasterboard: 5 Steps
- 1
Prepare the boards and apply the first bed coat
Check that all screws are driven just below the surface without breaking the paper face — a raised screw head will tear your tape later. Mix your jointing compound to a smooth, creamy consistency (pre-mixed compounds are usually ready to use straight from the tub). Using your 6-inch knife, apply a continuous bed coat along the full length of each joint, filling the recessed channel between boards completely and leaving a wet surface roughly 100–120 mm wide. Work in one direction and keep the coat even.
- 2
Embed the paper tape
Cut paper tape to the length of each joint. Centre the tape over the wet compound and press it gently into place with your fingers, then use your 6-inch knife to bed it firmly, working from the middle outward toward each end to avoid air bubbles. Hold the knife at a shallow angle and apply firm, consistent pressure. You should see a small amount of compound squeeze out from each edge — that means the tape is fully embedded. Remove the excess, leaving the tape just barely proud of the board face. Allow to dry completely, typically 12–24 hours depending on temperature and humidity.
- 3
Apply the second (fill) coat
Once the first coat is fully dry and hard, lightly scrape away any ridges or raised edges with your broad knife — do not sand at this stage as dust will contaminate the wet coat. Apply a second coat of compound with your 10–12-inch broad knife, feathering the edges out 50–75 mm beyond the first coat on each side. The goal is to begin hiding the tape edge and building toward a flush surface. Fill any screw holes with compound at this stage too — they each need two passes because the compound shrinks as it dries. Allow to dry fully again.
- 4
Apply the finish coat and feather wide
The third and final coat (the skim or finish coat) should be applied with the widest knife you have, feathering out to at least 200–250 mm from the joint centre on each side. Use a slightly wetter mix and lighter pressure. The key principle at this stage is wide and thin: a broad, thin coat that gradually blends into the flat board is invisible once dry; a narrow, thicker coat creates a raised ridge that catches light and shows clearly under paint. For external corners, bed corner bead or corner tape first, then apply compound over it in the same three-coat sequence.
- 5
Sand, prime, and inspect under raking light
When the final coat is hard and white throughout (grey or dark patches mean it is still wet), sand with a fine-grit sanding sponge using light circular movements. Do not over-sand — you only want to knock back any raised edges, not create a hollow. After sanding, apply a coat of drywall primer or diluted PVA before painting; this seals the compound so topcoat paint does not sink unevenly. Hold a work light at a low raking angle across the surface to reveal any remaining ridges before you paint — it is far easier to add a thin skim of compound and re-sand than to repaint a wall with visible joints.
Rather have a pro handle it?
Get a vetted renovation pro in your city — one number, booked in EN/EL/DE.
FAQ
- Can I use fibreglass mesh tape instead of paper tape?
- Mesh tape is easier to apply because it is self-adhesive, but it is weaker than paper tape and more prone to cracking over time — especially across flat butt joints where there is no recessed channel to absorb movement. Paper tape embedded in compound produces a stronger bond and is the trade standard for flat joints. Use mesh tape only for corner bead backing or small patch repairs where paper tape is awkward to handle.
- How long do I need to wait between coats?
- Each coat must be completely dry before the next one goes on — this usually means a minimum of 12 hours in warm Greek summer conditions, and up to 24 hours or more in cooler or humid conditions (winter, north-facing rooms, basements). Applying the next coat over a damp layer causes shrinkage cracks and poor adhesion. If you are in a hurry, use a fan or dehumidifier to speed drying, but never use a heat gun directly on jointing compound as it can cause surface-drying while the core remains wet.
- When should I call a professional instead of doing this myself?
- Taping and jointing flat partition walls is well within DIY capability with practice. You should call a licensed professional if: the plasterboard is part of a fire-rated wall or ceiling assembly (the fire rating depends on the correct compound, tape, and thickness — a DIY approach can void it); if you are boarding over a damp or external wall without a proper vapour barrier or insulation system (moisture problems behind boards worsen over time); or if you are working in a Greek hotel or rental property that needs to pass a building inspection. Structural walls and anything involving permits should always involve a licensed contractor.