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Plasterboard is basically an inner layer of gypsum sandwiched between two outer layers of lining paper including various additives in the gypsum layer and varying the weight and strength of the lining paper, will give the finished board different properties
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Gypsum is made up of crystals containing a small amount of water (known as water of crystallisation). In a fire, this water is driven-off, helping to keep the temperature of the fire down, and preventing rapid fire spread. Plasterboards, are therefore used extensively for fire protection proving up to 4 hours protection in some special multi-layer system applications.
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Plasterboard is good for cutting down noise transmission particularly airborne sounds such as speech and music. High performance plasterboards, have a specially designed core that provides even better insulation against sound.
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Whilst standard plasterboard is ideal for most environments, it shouldn't be used in constantly damp conditions. For kitchens, bathrooms and similar damp areas, Moisture Resistant plasterboard should be used. It's specially designed with silicone additives in the core so it just shrugs off water it's great as a tile backer.
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Most common plasterboards come with the option of either tapered edge or square edge. Tapered edge boards are ideal for either jointing or skimming, while square edge is generally used for textured finishes.
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Plasterboard generally comes in 1200mm wide sheets, designed to suit the standard 600mm stud spacing used in housing today.
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Most standard plasterboard has one ivory face and one brown. The liner on the ivory face is specially designed for plastering plaster should not be applied to the brown reverse face. Paper liners are generally made from recycled paper a big plus for the environment.
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