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Plasterboard & Coving

MGN Builders Merchants offers a trade quality, extensive plasterboard range sourced from the leading UK manufacturers, our range includes wallboards in various types and thicknesses including 15mm plasterboard, tapered edge plasterboard, 9.5mm plasterboard, 6mm plasterboard.

Just browse our selection online or simply call us and we will provide you with a free and quick quotation. The information below includes frequently asked questions and answers carefully selected and hopefully enabling us to assist clients in the selection and construction process.


What is plasterboard?


Plasterboard is a type of sheet material that is produced of calcium dihydrate ( gypsum) hot-pressed between backer and facer to form durable and cost-effective wallboard. Drywall construction is a very popular, quick and cost-effective alternative to traditional plaster and lath. The plasterboards are predominantly used in the construction of interior walls and ceilings. 

The variation of plasterboard types is very wide, and each of those types will guarantee to meet building regulations standards for acoustic insulation, thermal efficiency and fire protection. There is also moisture resistant plasterboard that will control condensation in areas with high humidity.

Our current range includes the following types:

Moisture Resistant Plasterboard - this type of plasterboard is enhanced with water repellent additives added to the core of the panel and has a distinctive green colour.  The waterproof plasterboard is predominantly used in rooms with intermittent moisture exposure, like kitchen and bathroom wall applications where additional performance and protection is required.  Our current range of green plasterboard includes the 15mm Moisture Resistant Plasterboard Tapered Edge and 12.5mm Moisture Resistant Plasterboard

Insulated Plasterboard - is a type of thermal plasterboard that consists of a sheet of gypsum board sandwiched together with polyisocyanurate insulation core forming a durable and cost-effective insulation single panel. It is mainly used to line internal walls and is able to stop condensation on external walls simply by adding a layer of insulation plasterboard.  We currently stock the 25mm PIR insulated plasterboard and 40mm PIR insulated plasterboard.

Standard Plasterboard - is made of calcium sulfate dihydrate and is pressed between facer and baker forming a basic performance sheet panel. This type of plasterboard is predominantly used to make interior walls and ceilings.  Our current range includes a square edge plasterboard and a tapered edge in the following sizes: 12.5mm plasterboard and 9.5mm plasterboard.

Foil Backed Plasterboard - has the same properties as standard plasterboard, but in combination with added polyester foil that creates an effective vapour barrier, it limits moisture diffusion and provides excellent vapour resistance. Therefore this type of sheet panel is predominantly used in roofs, walls and decks sheathing.  Our current range consists of 12.5mm foil backed plasterboard.

Acoustic Plasterboard - as the name suggests this type of plasterboard reduces noise transmission. It has a greater density than the standard plasterboard and is predominantly used in wall lining and partitioning systems installations where greater levels of sound insulation are required. Browse our trade quality range online, we currently stock acoustic plasterboard in 15mm and 12.5 mm sizes.

Thermal Plasterboard - is a type of plaster board where the 9.5 mm standard plasterboard is laminated to expanded polystyrene.  This type of thermal board is predominantly used to provide basic thermal resistance to existing walls.

Tile Backer Board - is also known as cement board, which plays a key role in the wet room construction, acting as a foundation and waterproof base on which the tiles will be placed. 

Fire Plasterboard -  this type of sheet material is manufactured with special glass fibre additives added that are acting to boost fire resistance properties. The board has a distinctive pink paper lining for easy recognition and is predominantly used in partitioning and ceiling constructions 


The benefits of plasterboard.


The plasterboard is a budget-friendly, convenient and versatile sheathing material. It creates a smooth and seamless finish making it an ideal sheeting material for ceilings and walls. It will not only provide an even and smooth finish but also protects exterior walls from the elements and can retain the temperature of the room. The panels are solid and dense so they can act as an effective noise reducer. The important benefit is that the boards are fire resistant to flames and it can also slow a fire from spreading.  


How thick is plasterboard?


The standard plasterboard comes in two predominantly used thicknesses 9.5mm and 12.5mm, where the 9.5mm plasterboard size is used for ceilings. It is advisable to use thinner plasterboard panels as the thicker ones will stick harder to the ceiling and it will be more difficult to seal joints.

The plasterboard sizes like 12.5mm and 13mm are recommended for walls as they provide great noise insulation. The panels of this thickness can also be used in bathrooms, nurseries and home offices. 


Is it cheaper to plasterboard or plaster?


So if we are counting materials alone then the plaster tends to be cheaper than plasterboard application. However, the real expanse comes from the labour costs that can vary dramatically. So, during the drywall application, the labour cost is minimal and the actual application process is very quick and can be completed within a matter of hours. Whereas with the traditional wet plastering the layers are applied by the tradesman and then each layer needs to be left to dry before the next coat can be applied. So, it is definitely more cost-effective to drywall than to wet plaster the wall.


What will stick plasterboard to walls?


The plasterboard adhesive also referred to as bonding compound is the most popular tool that is used to stick plasterboard to walls and can also provide insulation against sound, heat and moisture ingress. The adhesive application process is known as ‘ dot and dab’ is the most popular type of glue application, during this process, the plasterboard adhesive is spread in evenly spaced dots and dabs throughout the surface. 


Do I need to prime plasterboard before painting?


It is strongly advisable to prepare the surface. The drywall tends to absorb more paint than it shares. If you do not prepare the surface you might end up applying many coats of paint before you see that the mudded seams and fasteners' holes stop being exposed. So priming the surface will enable you to complete the project with fewer coats of paint providing you with a uniform surface. 

If you are in doubt about what type of plasterboard you require, do not hesitate to give us a call and our team of experts will be able to assist you in your selection process. 


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  1. Insulated Tile Backer Board 12 x 600 x 1250mm
  2. Insulated Tile Backer Board 20 x 600 x 1250mm
  3. Insulated Tile Backer Board 6 x 600 x 1200mm
  4. Artline Cornice Agnola 2400mm COV1029
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