Understanding the Two Methods
At its core, the choice comes down to depth of finish versus speed of finish. Traditional plastering applies a wet plaster coat over the board surface, creating a hard, monolithic wall ready for decorating. Jointing and filling, often called the drylining or drywall method, involves using tape and compound to conceal board joints and fixings only, leaving the board face itself ready to prime and paint.
Both methods are valid and widely used across the UK. The right choice depends on your board type, the room's intended use, the quality of finish you need, and honestly, your skill level.
| Factor | Traditional Plastering | Jointing & Filling |
|---|---|---|
| Finish quality | Very hard, seamless surface; hides board imperfections | Smooth surface; board face must be defect-free to start |
| Skill required | High, plastering takes practice to master | Moderate, achievable by a capable DIYer with patience |
| Drying time | 24-48 hrs before decorating (longer in cold or damp) | Multiple coats needed; each coat dries overnight |
| Durability | Extremely hard surface; resists knocks and scuffs well | Good durability when primed and painted correctly |
| Cost | Higher if professional is hired; materials cost more | Lower materials cost; more suited to DIY |
| Best for | Living spaces, bedrooms, high-traffic areas, older properties | New builds, commercial, drylining fit-outs, ceilings |
| Board type needed | Square-edge or tapered-edge boards; must use correct grade | Tapered-edge boards strongly preferred for flush jointing |
Traditional Plastering Explained
Plastering involves applying one or two coats of wet gypsum plaster to the board surface, which is then ruled flat, floated and finished to a smooth, hard surface. When done well, it creates a finish that is difficult to beat, sharp, durable and completely seamless from corner to corner.
How Plastering Works
Apply a diluted PVA sealer or bonding agent such as Thistle GypPrime to reduce suction and help the plaster bond evenly. This is a critical step that beginners often skip, and it shows in the finish. Apply Thistle ProTape FT50 self-adhesive scrim tape over all board joints at this stage, pressing it firmly into place before plastering begins.
On brick, block or high-suction backgrounds, apply an undercoat plaster such as Thistle HardWall or Thistle BondingCoat to an approximate thickness of 8-11mm. Rule flat and scratch ready for the finish coat.
Skim the finish plaster, typically Thistle MultiFinish, Thistle BoardFinish or a ThistlePro product, at approximately 2mm thickness across the surface. Work quickly and evenly, as gypsum finish plasters have a limited open time.
As the plaster begins to firm, trowel it flat using long, crossing strokes. Add a small amount of water to ease the final pass and polish the surface to a smooth, tight finish.
Allow at least 24-48 hours before applying mist coat or decoration. Fresh plaster must dry from pink to an even pale ivory colour before it is ready.
Plastering is one of the more demanding trades to master. Achieving a truly flat, blemish-free finish requires a feel for the material that takes real practice to develop. For large areas, whole rooms, ceilings or hallways, we strongly recommend using a British Gypsum Certified Plasterer. For smaller repairs, feature walls or outbuildings, a confident DIYer with the right materials and patience can achieve good results.
Jointing and Filling Explained
Jointing and filling, sometimes called the drylining finish, leaves the majority of the board face untouched. Instead, only the joints between boards, the screw fixings and any internal or external angles are treated, bedded with paper tape and built up with compound in stages to a flush, flat surface.
When primed and painted properly, the result is clean and virtually indistinguishable to the eye. It is the standard method in commercial construction and new-build housing, and it's increasingly common in domestic renovations too.
How Jointing Works
Apply a band of Gyproc Joint Filler along each joint using a wide drywall knife. Press Gyproc Joint Tape into the wet compound and smooth flat, ensuring no bubbles or lifts remain. This is the structural layer, it locks the joint and prevents cracking.
Once the first coat has dried fully, apply a second, wider coat of Gyproc QuickSand (powder) or Gyproc ProMix Lite (ready-mixed). Feather the edges out beyond the tape to begin blending the joint into the surrounding board surface. If using Gyproc EasiFill 60, this second coat can be applied as part of the same two-coat process.
Apply a thin, wide third coat, extending the feathering further. At this stage the joint should be almost invisible. Fill screw heads with a small dab of compound at each stage alongside the joints.
Once fully dry, lightly sand any high points and dust down. Apply a good-quality drywall primer across the entire surface, this is essential to even out the difference in porosity between the compound and the board face before painting.
British Gypsum offers two routes through the jointing process, and the difference comes down to how much control you want over each coat.
A combined setting and air-drying compound that beds and finishes on its own, two coats and done. Efficient, forgiving, and the only compound suitable for patching and repair.
A fast-setting base coat followed by a dedicated finish coat. More control over each stage, and the standard choice in commercial drylining.
For most domestic DIY projects, EasiFill 60 or ProMix Lite offer the simplest path to a good result.
The skills required are patience, careful feathering and knowing when to stop. Rushing the drying time between coats is the most common mistake, it causes the compound to crack or pull. Take your time, allow each coat to dry overnight, and the results can be very good.
British Gypsum Products to Know
British Gypsum's Thistle and Gyproc ranges cover both methods comprehensively. Below we've split the key products by discipline so you can go straight to what's relevant for your project.
Thistle ProTape FT50
Self-adhesive glass fibre mesh scrim tape used to reinforce flat joints before plastering. Position over the joint, then skim directly over it, the plaster is pressed through the mesh to lock the joint and minimise the risk of cracking. Also useful for reinforcing small areas of damaged plasterboard. Note: this is not a substitute for Gyproc Joint Tape in jointing systems.
View Product →Thistle GypPrime
Plaster bonding agent applied to plasterboard before skimming. Controls suction across the board face for a more even, workable skim coat.
View Plaster→Thistle HardWall
Tough undercoat plaster for medium to high suction backgrounds such as brick and block. Applied before any finish coat at approximately 8-11mm.
View Plaster →Thistle BondingCoat
Undercoat plaster for low to medium suction backgrounds. Provides a keyed surface for the finish coat on dense or smooth substrates.
View Plaster →Thistle BoardFinish
Finish plaster designed specifically for skimming directly onto plasterboard. Lightweight, excellent workability and a very smooth final surface.
View Plaster →Thistle MultiFinish
Versatile finish coat suitable for both plasterboard and undercoat plasters. Ideal when working across mixed backgrounds within the same room.
View Plasters →ThistlePro DuraFinish
Enhanced-hardness finish for high-traffic areas, hallways and commercial spaces. Resists scuffs and impacts better than standard finish plasters.
View System →ThistlePro PureFinish
Actively absorbs and breaks down VOCs to improve indoor air quality. A particularly good choice for bedrooms, nurseries and living spaces.
View System →ThistlePro FastSet Finish
Faster-setting finish plaster for projects where quicker turnaround matters. Suitable for a wide range of backgrounds from plasterboard to backing coats.
View System →Gyproc Joint Tape
Paper tape for reinforcing flat joints and internal angles in jointing systems. Pre-creased for internal corners, with chamfered edges and spark perforations for a superior bond. Applied by hand or machine, bedded in jointing compound, not plaster. This is not the same as scrim tape and should not be used under skim finishes.
View Gyproc Joint Tape →Gyproc Corner Tape
Steel-reinforced paper tape bonded to two corrosion-resistant metal strips, specifically for external and non-standard angles. Produces a crisp, perfectly straight edge at any angle where traditional corner bead cannot flex to fit. Applied using the same jointing compound as standard paper tape.
View Gyproc Corner Tape →Gyproc EasiFill 60
A combined setting and air-drying compound that handles both the bedding and finishing stages, making it a genuine two-coat solution. High coverage rates and minimal drying shrinkage make it efficient on site and well suited to professionals or confident DIYers who want to work through a job in fewer steps. Also the only compound in the range suitable for patching and repair work.
View Jointing Product →Gyproc Joint Filler
A gypsum-based setting compound for the bedding coat, the first structural layer that beds the tape and bulk-fills the joint. Sets rather than air-dries, giving faster progression to the finishing stage compared to air-drying alternatives. Used as the base coat before Gyproc QuickSand or ProMix Lite for the finish.
View Jointing Product →Gyproc QuickSand
An air-drying powder compound designed for the finishing stage over Gyproc Joint Filler. Suitable for both hand and mechanical application, making it a flexible choice across different project sizes and working methods.
View Jointing Product →Gyproc ProMix Lite
A ready-mixed compound straight from the tub, lightweight, low-shrinkage and requiring no measuring or mixing. Designed for the finishing stage over Gyproc Joint Filler and compatible with both hand and mechanical application. The most straightforward option for DIYers or anyone who prefers to skip the mixing stage entirely.
View Jointing Product →Why Priming Is a Step You Cannot Skip
Whichever method you use, priming is the stage that ties everything together before decoration. It's also one of the most commonly overlooked steps, and skipping it almost always shows up in the final painted finish. The requirements differ slightly between plastering and jointing, so it's worth understanding what each surface needs and why.
Priming After Plastering
Fresh plaster is highly absorbent and alkaline. Applying a standard emulsion directly onto new plaster draws moisture out of the paint too quickly, resulting in a patchy, uneven finish that can lift or flake over time. Before any decoration, new plaster must be sealed with a mist coat, typically a diluted emulsion (roughly 3 parts paint to 1 part water) applied to the fully dried surface. This seals the pores, evens out suction and gives subsequent full-strength coats something stable to bond to.
Critically, the plaster must be completely dry before any mist coat goes on. Fresh plaster dries from the outside in, and while the surface may look pale and dry, moisture can remain trapped beneath. Decorating too early traps that moisture and causes problems down the line, blistering, cracking or a hollow, papery surface. Allow at least two to four weeks in a well-ventilated room, or longer in cold or damp conditions.
Wait until the plaster has turned a uniform pale ivory colour throughout, no dark or pink patches remaining. Apply a diluted mist coat first, allow it to dry fully, then follow with your standard emulsion in full-strength coats. Never apply neat paint directly to bare new plaster.
Priming After Jointing and Filling
Jointed plasterboard presents a different challenge. Once the compound is fully dry and lightly sanded, the wall surface is made up of two different materials, the paper-faced board and the jointing compound, each with a different level of porosity. Without priming, paint will be absorbed at different rates across the surface, leaving visible differences in sheen that show up clearly in raking light, particularly on flat or eggshell finishes.
A dedicated drywall primer or a diluted mist coat must be applied across the entire surface before any topcoat. This equalises the porosity between the board face and the compound areas, ensuring the paint goes on evenly and the finished surface looks consistent. Sanding dust must be thoroughly removed before priming, any residue left on the surface will prevent the primer from bonding correctly.
Sand lightly once all compound coats are fully dry, then dust down completely. Apply a full coat of drywall sealer or diluted emulsion across the entire surface, board face and joint areas alike. Allow to dry before applying topcoat. This step is non-negotiable if you want a consistent painted finish without visible joint lines.
One Rule That Applies to Both
Whether you've plastered or jointed, the surface must be fully dry before any primer or paint is applied. Moisture trapped beneath a coat of paint or primer has nowhere to go, and the results, blistering, peeling, cracking, will mean redoing the work. Take the time to let the surface cure properly and the priming coat will do its job correctly.
Does the Type of Board Matter?
Yes, significantly. The edge profile of your plasterboard determines which finish method works best, and using the wrong board with the wrong method will make achieving a flat, professional finish much harder.
Square Edge
Boards with a straight, unrecessed edge. The joint between boards sits at the surface level, making it harder to build a flat compound joint without a visible ridge. Best suited to plastering, where the skim coat covers the entire surface.
Best for PlasteringTapered Edge
The standard choice for jointing systems. The recessed taper along each long edge creates a shallow channel where the tape and compound sit, allowing a flush, flat joint to be built up without a ridge proud of the board face.
Best for JointingMoisture Resistant (MR)
Green-faced boards designed for areas with higher humidity, kitchens, bathrooms and utility rooms. Both plastering and jointing can be used, but plastering is preferred to seal the board face more completely.
Either MethodFire Resistant (FR)
Used where fire performance is a requirement, party walls, garages and commercial applications. Both plastering and jointing are used with fire-resistant boards, always check the manufacturer's technical documentation to ensure the finish method aligns with the system's tested performance.
Either MethodAcoustic Plasterboard
Higher-density board used within sound-reducing wall and ceiling systems. Both plastering and jointing can be used, refer to the manufacturer's technical guidance for the board and system you're working with to confirm the right approach.
Either MethodInsulated Plasterboard
PIR or polystyrene-backed boards that combine insulation and lining in one. Typically jointed and filled rather than plastered, as the board face is designed to be decorated directly after jointing and priming.
Best for JointingIf your project involves fire-rated or acoustic systems, the finishing method is not optional, it is part of the tested specification. Always refer to the manufacturer's technical documentation for the board you are using to confirm the correct finishing method, coat thicknesses and product combinations. Using the wrong finish on a performance-rated board can invalidate the system. If you're unsure, get in touch and our team can point you in the right direction.
Plastering or Jointing: Who Should Do Which?
Choose Traditional Plastering If...
- You want the hardest possible finish. Nothing beats a traditional plaster wall for durability and the ability to withstand the inevitable knock or scuff over the years.
- You're working in an older property. Plastered walls are the norm in pre-1990s UK housing. Mixing jointed drylining with existing plaster can look inconsistent, particularly in raking light.
- The room will see heavy use. Hallways, landings, children's rooms and commercial spaces benefit from the additional hardness that plaster provides.
- You're hiring a plasterer anyway. If a professional is on site, skimming is a natural and well-priced addition to the work.
- You have square-edge boards already fixed. Jointing square-edge boards without a recess is difficult to achieve to a high standard.
Choose Jointing and Filling If...
- You're a confident DIYer. Jointing is more forgiving to learn than plastering. The compound is applied in stages and sanded if needed, there's no tight working window to worry about.
- Speed matters. A jointed and filled room can be primed and painted within a couple of days. A plastered room needs longer drying time before any decoration can start.
- You've installed tapered-edge boards. The recessed joint is made for compound jointing, it's what the system is designed around.
- You're working on a ceiling. Jointing is generally preferred for ceilings, particularly in new-build or renovation scenarios where a flat, painted ceiling is the target finish.
- The project is commercial or a new build. Jointing is the industry standard method in drylining specifications and aligns with most modern construction practices.
Top Tips Whichever Method You Choose
- Prime before plastering. Always apply Thistle GypPrime or a diluted PVA to plasterboard before skimming. It controls suction and prevents the plaster from drying out too quickly.
- Use the right tape for the right method. For plastering, use Thistle ProTape FT50 self-adhesive scrim tape over joints before skimming. For jointing systems, use Gyproc Joint Tape (paper tape) bedded in compound. The two tapes are not interchangeable, using paper tape under plaster or scrim tape in a jointing system will cause problems with the finished surface.
- Control the environment. Cold or damp conditions slow drying dramatically and can cause problems with both plaster and compound. Aim to work in a room above 5°C with reasonable airflow.
- Always prime before painting, without exception. New plaster needs a diluted mist coat to seal the pores before any topcoat. Jointed boards need a drywall primer or diluted emulsion across the entire surface to equalise the porosity between the board face and compound areas. In both cases, the surface must be fully dry first. See our priming guidance above for the full detail.
- Follow the system specification. If you're using British Gypsum plasterboards and products, refer to the relevant system in the White Book to confirm coat thicknesses and product combinations for your specific background type.
Find the Right Products for Your Finish
Browse our full range of British Gypsum plasterboards, Thistle plasters and Gyproc jointing products, all available for delivery across the UK.
