Question 1

1. What size screws do I need for 12.5mm plasterboard?

Accepted Answer

Most installers use drywall screws between 25mm and 38mm for 12.5mm plasterboard, depending on the substrate. Shorter screws can usually be used for metal studs, while longer screws may be needed for timber or multi-layer boarding.

Question 2

2. Is 12.5mm plasterboard fire rated?

Accepted Answer

Standard 12.5mm plasterboard is not automatically fire rated on its own. Fire resistance depends on the system build-up. To improve fire performance, you can use red fire rated plasterboard that’s specifically designed for this.

Question 3

3. What type of plasterboard fixing do you need for 12.5mm plasterboard?

Accepted Answer

Fixings depend on the background. Use drywall screws for timber or metal framing. For masonry, use drywall adhesive dabs or specialist plasterboard fixings. Mechanical fixings may also be used where additional support is needed.

Question 4

4. Can you use 12.5mm plasterboard on ceilings?

Accepted Answer

Yes, 12.5mm plasterboard is commonly used on ceilings. It provides sufficient rigidity for standard joist spacings and is widely used in both direct-fix and MF ceiling systems.

12.5mm plasterboard

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