Domakihub How to Dry-Line a Wall with Plasterboard: Step-by-Step
Transform rough masonry into a smooth, paint-ready surface using the dot-and-dab method.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
Dry-lining — fixing plasterboard directly to a masonry wall using adhesive dabs rather than a full render coat — is one of the fastest ways to bring a rough concrete or brick wall to a smooth, paintable finish. The video above walks through the full dot-and-dab process in real time; the steps below give you the detail, the tool list, and the judgment calls you need before you start. Whether you are renovating a holiday villa in Crete, upgrading an Athens apartment, or refitting a small hotel, this guide will help you understand what the job involves and when to hand it to a professional dryliner.
What Is Dry-Lining and Why Use It in Greece?
Dry-lining is the practice of bonding plasterboard sheets (gypsosanida in Greek) directly to a wall using a cement- or gypsum-based adhesive — most commonly called dot-and-dab adhesive or board-finish compound — applied in blobs rather than a continuous skim. The finished board surface needs only a thin skim coat of finish plaster (or a taped-and-jointed finish for a plaster-free system) before paint.
In Greek construction, internal walls are typically rendered blockwork or poured concrete. Dry-lining skips the two- or three-coat render process entirely, shaving days off a refurbishment. It also allows a thin layer of PIR rigid insulation board to be bonded behind the plasterboard, useful in older buildings with no cavity wall and in coastal properties where cool night temperatures cause surface condensation.
When You Need a Professional or a Permit
Dry-lining a standard internal wall is a non-structural, non-notifiable job in Greece and does not require a building permit on its own. However, if the wall carries any structural load, or if you are creating a new room division that changes the floor plan of a licensed dwelling, consult a licensed civil engineer (politikos michanikós) before you start — alterations to the structural envelope require permit drawings and an engineer's stamp.
Damp is the most common reason a drylining job fails prematurely. If the wall shows efflorescence (white salt deposits), active moisture, or rising damp, do not board over it: the moisture will soften the adhesive, mould will colonise the void, and the boards will eventually de-bond. Commission a damp survey first. Similarly, if the wall contains gas pipes or load-bearing steel that needs to be boxed in, engage a licensed gas installer or structural engineer respectively before closing the wall.
How to Dry-Line a Wall with Plasterboard: 5 Steps
- 1
Prepare and check the wall
Clear the area and inspect the masonry. Chip off any loose render, fill large voids with a bonding compound, and treat any damp patches with a waterproofing slurry — then wait for it to cure fully before proceeding. Prime absorbent blockwork with a diluted PVA bonding agent (1:4 water:PVA) and let it become tacky. Check the wall for plumb and bow using a long spirit level or a taut string line: if the worst high spot to low spot deviation exceeds about 25 mm across the wall, you may need to pack the adhesive dabs thicker on the low sections or chase back high spots with an angle grinder.
- 2
Mark out the board positions and cut boards to size
Standard plasterboard sheets in Greece are typically 1200 mm wide and 2400 mm tall (12.5 mm standard or 15 mm for fire/acoustic upgrades). Lay out a starting line 12 mm from one corner to allow a slight gap that keeps the board clear of the adjacent wall — this prevents damp wicking. Mark the cutting lines on the face side, score firmly along the line with a Stanley knife and a straight edge, then snap the board away from the score. Cut through the paper backing on the reverse with the knife. Cut-outs for sockets and switch boxes can be made with a pad saw or oscillating multi-tool.
- 3
Mix and apply the adhesive dabs
Mix dot-and-dab adhesive (a ready-to-use gypsum or polymer-modified adhesive such as Knauf Aquapanel Bond or Gyproc Dri-Wall Adhesive — both widely stocked in Greek builders' merchants) to a stiff peanut-butter consistency following the bag's water ratio. Using a notched trowel or a plasterer's bucket trowel, apply dabs roughly 50–75 mm in diameter in three vertical columns per board: one 50 mm in from each long edge and one in the centre. Space dabs 300 mm apart vertically. Add a continuous horizontal band of adhesive along the bottom edge of the wall where the board meets the floor line — this band seals the void and prevents air movement. Apply the adhesive quickly; working time is typically 20–30 minutes.
- 4
Fix the board and check plumb
Lift the board into position — a board lifter foot lever makes solo work practical — and press it firmly against the wall so the adhesive dabs flatten and grip. Tap across the face with a rubber mallet and use your spirit level continuously to ensure the board is plumb in both directions before the adhesive starts to set. Place the board on a 10 mm timber packers to keep it off the floor slab (the gap protects against floor moisture and allows for slight slab movement). Work board-by-board across the wall, butting tapered edges together where possible so the joint recess can accept jointing tape and compound neatly.
- 5
Joint, skim, and finish
Once all boards are fixed and the adhesive has cured (typically overnight), fill the butt joints and screw holes with jointing compound, bed in paper jointing tape, feather out with a second coat, and sand flush when dry. For a traditional British-style finish, apply a 2–3 mm coat of finish plaster (Thistle Board Finish or equivalent) over the entire board surface using a plastering trowel — this is what most Greek plasterers are used to, and it gives an excellent base for emulsion paint. Alternatively, use a skim-free tape-and-joint system and apply two full coats of jointing compound, sanding between coats, for a paint-direct finish without any plaster skim.
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FAQ
- How long does dot-and-dab adhesive take to set before I can plaster over it?
- Most gypsum-based dot-and-dab adhesives reach initial set in 1–2 hours and are firm enough to joint the next morning. Wait a full 24 hours before applying a skim coat of finish plaster, and 48 hours in humid coastal conditions or during the cooler Greek winter months. Applying plaster too early traps moisture behind the board and can cause the adhesive to creep.
- Can I dry-line a wall that has an existing ceramic tile or paint coat?
- Tiled walls are generally unsuitable for dot-and-dab — the smooth glazed surface offers very poor adhesion and the combined weight of tiles plus board is high. Remove tiles first, then prime the exposed render. Painted walls should be sanded to break the gloss and primed with bonding PVA; if the paint is flaking or oil-based, strip it back to bare render before boarding.
- Do I need building permission to dry-line an internal wall in Greece?
- For a like-for-like internal renovation — replacing old render with plasterboard on an existing wall without altering the room layout — no building permit is required. However, any change to the room's structural envelope, the creation of a new habitable room, or alterations in a listed building or conservation area (diατηρητέο) will require drawings stamped by a licensed civil engineer and submitted to the local planning office (Ypiresía Dómisis). When in doubt, consult your local municipal authority or a licensed engineer before starting work.