Fixing and buying guide
Siniat Standard Plasterboard 2400mm x 1200mm x 12.5mm SE (72)
What this product is for
This is a standard internal plasterboard for creating partition walls, lining existing walls, and boarding out ceiling joists. The 12.5mm thickness is the most common specification for general internal applications where fire performance and sound insulation are not critical design requirements. It is not suitable for external use or wet areas such as bathrooms and kitchens without additional protection.
- Internal partition walls on timber or metal studs
- Wall linings over masonry or existing surfaces
- Ceiling boarding on timber joists
- New build and refurbishment projects
Choosing the right size and quantity
Each sheet is 2400mm long by 1200mm wide, covering 2.88 square metres per board. Measure your wall or ceiling area in square metres and divide by 2.88 to calculate the number of sheets required. Add 5 to 10 per cent extra to account for waste, cutting and fitting around openings. The 2400mm length aligns with standard 600mm stud spacing, minimising cutting and waste on typical partition layouts.
- One sheet covers 2.88m²
- 2400mm length suits 600mm stud centres
- 1200mm width is standard for most applications
- Order in multiples of 72 sheets per pallet
Fixing and installation
Square edge plasterboard is fixed to timber studs or joists using galvanised plasterboard nails or drywall screws. Nails should be spaced approximately 150mm apart around the perimeter and 200mm apart on intermediate studs. Screws are preferred for better holding and reduced nail popping; space them 300mm apart on studs and 400mm on ceilings. Ensure studs and joists are straight and properly spaced before fixing. Once fixed, joints between sheets are taped and jointed using joint compound, or the entire surface can be skimmed with finish plaster.
- Fix with galvanised nails or drywall screws
- Nail spacing: 150mm perimeter, 200mm intermediate studs
- Screw spacing: 300mm studs, 400mm ceilings
- Joints finished with tape and compound or skim coat
- Ensure studs and joists are straight and at correct centres
Pre-installation checks
Before ordering and fixing, confirm that your stud or joist framework is complete, straight and at the correct spacing. Check that the building is weathertight and any structural work is finished. Plasterboard should be stored flat in a dry location and acclimatised to site conditions for 48 hours before use. Inspect sheets on delivery for damage; do not use boards that are bent, crushed or water-damaged. Ensure you have adequate fixings, joint tape and compound on site before starting work.
- Verify stud and joist spacing and alignment
- Store boards flat and dry before use
- Allow 48 hours acclimatisation on site
- Check for damage on delivery
- Have fixings and finishing materials ready