Plasterboards are one of the most popular building materials used within the construction industry today. The boards are generally made of a Gypsum core and quality paper linings. The boards are designed for the internal insulation of walls and ceilings to provide a wall finish. Specially made boards designed for external use are also available. Plasterboards are manufactured by brands British Gypsum, Siniat, and Knauf. The boards are also available with additives for specific installation needs such as fire resistance, sound resistance, and moisture resistance. See more information on the plasterboard products below.

Standard Plasterboard – Grey Plasterboard

Standard wallboard panels have a gypsum core with quality paper linings. These boards are generally installed to provide a wall finish on ceilings and walls. These products are easily installed and decorated.

Colour: Ivory, Grey
Sizes: 900mm, 1200mm x 1800mm, 2400mm, 2700mm, 3000mm
Thickness: 9.5mm, 12.5mm, 15mm
Brands Available: Siniat, British Gypsum, Knauf

Fire Board – Pink Plasterboard
Fire panels have a gypsum core lined with quality paper containing an integrated vapour control layer. These boards are generally installed where rooms are separated such as hallways, ceilings, and partition walls. Fire boards prevent the spread of fire by providing a longer period of fire resistant.

Colour: Pink, Silver
Sizes: 1200mm x 2400mm
Thickness: 12.5mm, 15mm
Brands Available: Siniat, British Gypsum, Knauf

Sound Board – Blue Plasterboard

Sound panels have a dense gypsum core lined with quality paper. These boards are generally installed where sound travels through spaces such as media rooms, hotels, and between floors. Soundboards reduce noise levels travelling throughout buildings providing a more comfortable living and working environment.

Colour: Blue, Grey
Sizes: 1200mm x 2400mm, 2700mm, 2800mm, 3000mm
Thickness: 12.5mm, 15mm
Brands Available: Siniat, British Gypsum, Knauf

Moisture Resistant Board – Green Plasterboard

Moisture panels have a Gypsum core lined with quality paper containing moisture resistant additives. These boards are generally installed where moisture levels are high such as in kitchens, bathrooms, and internal garages. Moisture boards prevent the build-up of moisture which can lead to condensation, mould, and rot.

Colour: Green
Sizes: 1200mm x 2400mm, 2700mm, 3000mm
Thickness: 12.5mm, 15mm

Vapour Panel – Silver Plasterboard

Vapour panels have a Gypsum core lined with quality paper and metallised polyester foil. These boards are generally installed where moisture levels are high such as external walls or roofs. Vapour panels protect the building structure from water damage.

Colour: Ivory, Silver
Sizes: 1200mm x 2400mm
Thickness: 12.5mm, 15mm
Brands Available: Knauf

Insulated Plasterboards

Insulated plasterboards are a polyisocyanurate (PIR) insulation boards lined with foil, bonded to a standard 12.5mm plasterboard. This board is a 2-in-1 product and is generally applied to improve the thermal quality of the building and installed within the walls and ceilings. Insulation boards keep buildings warm in the winter and cool in the summer.

Colour: Ivory, Silver
Sizes: 1200mm x 2400mm
Thickness: 37.5mm, 52.5mm, 62.5mm, 72.5mm, 77.5mm
Brands Available: Celotex, Kingspan, Recticel, Ecotherm, Siniat, British Gypsum, Mayplas, Speedline

How is plasterboard made?

Plasterboard is made from sturdy core materials, usually, gypsum – the main ingredient in standard wet plaster. One of the leading brands behind plasterboard’s progress is called British Gypsum, which was formed in 1915.
Manufacturers also apply materials such as paper, fibrous plastics, glass wool and foams. By adding particular elements to the boards manufacturers can create a board that is light and ideal for walls and ceilings. Other elements involved adding performance enhancing features such as fire or mould resistance.
Plasterboard also has a paper facing, which forms a smooth, flat surface that is ready to be plastered and finished after installation. Some plasterboards will require preparation before adding the finishing product and some boards come ready to paint or wallpaper.

How do you cut plasterboard?

Plasterboard can be cut by first measuring and marking to the size required. The board can then be cut with a fine-toothed saw by placing it on a flat surface above ground level to allow room for the saw to cut through the board. The boards can also be cut with a sharp blade by scoring one side of the board, snapping over a hard edge, and scoring the other side.

Do you leave a gap between plasterboards when installing?

When installing plasterboard there should be no gaps left around fixtures and fittings such as windows and sockets as this can cause cracks in the plaster however a small gap under 5cm, generally between 3-5cm can be left between the sheets of plasterboard. Butting the boards too closely together can also lead to cracks. When leaving gaps ensure they are correctly filled and taped.

How do you install plasterboards?

Dot and Dab method:

  • Always consult a building professional before installing plasterboards to ensure the product and installation method is accurate.
  • Always wear protective gear such as clothing, goggles, face mask, and gloves. This will prevent irritation to the eyes, skin and lungs caused by the products produces fibres.

Step 1:

Measure the installation space and cut the boards down to the necessary size. Be sure to make adjustments to fit outlets and wall openings by cutting the board to fit around all fixtures and fittings.

Step 2:

Start to prepare your adhesive in a clean bucket to avoid contamination following the instructions given on the packaging. Adhesives will go off fast and should only be prepared when the boards are prepped and you are ready to apply the adhesive, not before.

Note – Masonry walls absorb moisture which can affect your adhesive product. A layer of PVA is recommended to be painted on before applying adhesive however this is your choice.

The wall can be prepared by mapping out where the boards will be fitted onto the wall to ensure adhesive is applied in the correct spaces.

If PVA has been applied, ensure it is dry. The adhesive can now be applied to the wall. The amount of adhesive used will depend on the board type. Heavier boards will require more dabs to support the boards weight. If you wall is an uneven surface, even this out by applying larger amount of adhesive in “low” spots and a lesser amount in “high” spots which will help to get a level and even plasterboard.

The dabs should be applied 20-30cm apart and a large amount should be applied. A continuous layer of adhesive should also be applied around the perimeter of the board. Apply an extra line of adhesive just above where the skirting boards will be applied.

Step 3:

Press the plasterboards on to the wall using a spirit level and straight feather edge tool to achieve level and straight boards. Using your hands, lightly tap the board into place.

Leave a continuous gap between the plasterboard and floorboards to prevent damp spreading. Bottom floors should have a bigger gap up to 2 inches.

Step 4:

Finishing products can then be applied. Gaps should be filled; scrim tape should be applied to board joints and corner beads fixed to the corners. The boards can then be skimmed with a thin plaster coat or filled where necessary. Once all is applied and dry, wallpaper or paint can be applied to the wall.

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