British Gypsum Gyproc Plasterboard Square Edge 1800mm x 900mm x 12.5mm -Gyproc Plasterboard is a standard multi-use Plasterboard. These Plasterboards can be used for many applications and normally require skimming. When fixing this plasterboard sheet use drywall screws. Suitable for most applications where normal fire, structural and acoustic levels are specified. Suitable for direct decoration or Thistle plaster finish. This product comes in a Square Edge finish.