Plaster & Plasterboard

Frequently Asked Questions – Plaster & Plasterboard

What's the difference between standard and moisture-resistant plasterboard?

Standard plasterboard is suitable for many general internal wall and ceiling applications. Moisture-resistant plasterboard is manufactured to provide increased resistance to moisture and humidity and is designed for appropriate areas where standard plasterboard may not be suitable.

What plasterboard should I use in a bathroom?

Moisture-resistant plasterboard is commonly specified for suitable areas with increased humidity, such as bathrooms. However, it isn't automatically a substitute for waterproofing in areas exposed directly to water. Wet areas may require a suitable tanking or waterproofing system depending on the installation.

What's the difference between square edge and tapered edge plasterboard?

Tapered edge plasterboard has recessed edges designed to accommodate jointing tape and compound, allowing the joints to be finished flush when drylining. Square edge plasterboard has a consistent thickness across the board and is commonly used where the surface will receive a plaster skim or where a square edge is specified.

Should I use 9.5mm or 12.5mm plasterboard?

The correct plasterboard thickness depends on the wall or ceiling construction, fixing centres and performance requirements. 12.5mm plasterboard is widely used for many wall and ceiling applications, while 9.5mm boards may be suitable for particular systems. Always check the requirements of the installation before choosing a board.

What is fire-resistant plasterboard?

Fire-resistant plasterboard is manufactured for use within wall and ceiling systems requiring increased fire performance. The fire resistance achieved depends on the complete system, including the board type, number of layers, framing, fixings and installation method, so the relevant system specification should always be followed.

What is acoustic plasterboard?

Acoustic plasterboard is designed to provide enhanced sound performance compared with standard plasterboard. Products such as Siniat dB Board can be incorporated into suitable wall and ceiling systems where reducing sound transmission is an important consideration.

What is insulated plasterboard?

Insulated plasterboard combines plasterboard with a layer of insulation, allowing insulation and an internal lining to be installed as part of the same product. It can be used in suitable applications where improved thermal performance is required, subject to the building design and insulation specification.

What is vapour plasterboard used for?

Vapour-control plasterboard is designed to help control the passage of water vapour through suitable wall or ceiling constructions. Whether a vapour-control board is required depends on the construction, insulation system and building design.

Can plasterboard be fixed directly to a wall?

Plasterboard can be installed using several methods depending on the wall construction, including mechanical fixing to timber or metal framing and suitable direct-bond systems. The correct installation method and products should be chosen for the substrate and application.

Do I need special screws for plasterboard?

Plasterboard should be installed using fixings suitable for the board and supporting structure. Drywall screws are commonly used when fixing plasterboard to timber or metal framing, but the correct screw type, length and spacing depend on the system being installed.

How many plasterboards do I need?

Calculate the total area of the walls or ceilings being boarded and compare this with the coverage of the plasterboard size you're using. It's sensible to allow additional material for cuts and wastage. Our branch teams can also help you estimate quantities for your project.

Do you stock Siniat plasterboard?

Yes. County Building Supplies stocks a range of Siniat plasterboard and drylining products, including standard plasterboard, moisture board, fire board, acoustic dB Board, vapour board and jointing products. Product availability may vary by branch.

Do you deliver plasterboard?

Yes. County Building Supplies offers local delivery for plasterboard, plaster and other building materials across our trading area. Plasterboard sheets are large and can be easily damaged during handling, so local delivery can be particularly useful when ordering multiple boards. Contact your nearest branch for availability and delivery information.