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Summary: The different types of plasterboard and when to use them
Plasterboard, or drywall, is a remarkably versatile product consisting of gypsum plaster sandwiched between layers of thick paper. It is usually used on walls and ceilings. Plasterboard can be plastered over (see our project on skim plastering ) or painted. There are various types of plasterboard to cater for most situations found in the domestic or commercial environment. Using plasterboard as a wall finish can be much cheaper than wet plastering. Plasterboard comes in two thicknesses. 9.5mm or 3/8 inch and 12mm or 1/2 inch. Large sheets of plasterboard are traditionally 8 ft x 4ft or 2.4m x 1.2m but smaller sheets, called plasterboard laths are available for easy transportation and ease of handling. 15mm and 19mm sheets of plasterboard are not uncommon for boards which have a specific task such as fire proofing or sound insulation.
As well as the different makes of plasterboard for different situations, a different type of board is used when the surface is to be plastered as opposed to painted. To avoid seeing any joins in the plasterboard wall, a tapered board is used when the wall is to be painted. This means the thickness of the board is reduced very slightly as one gets towards the edge. Two thin edges are butted up to each other and some plasterboard tape is stuck over the joint. Then a thin layer of plasterboard joint filler is applied with a wide scraper and lightly sanded down so the surface of the filler finishes absolutely flush with the face of the board. This means the joint is not noticeable and the plasterboard tape stops the filler cracking should the wall move at all.
The most common types of plasterboard are:
Wall board which is suitable for most applications where normal sound levels, structural properties and fire specifications are found. Normal wallboard can be fixed at a double thickness to give greater assistance with fire and sound levels. It is usual to plaster onto the ivory face of the board and decorate directly onto the brown face but it makes no real difference which way round the board is fixed.
Vapour barrier or vapour check plasterboard which has a thin metallic film on the reverse of the sheet. This film stops warm vapours passing through the board which could lead to condensation when they passed through to a colder surface. Commonly used when dry lining a building to keep it warm and well insulated.
Sound reduction or acoustic plasterboard which has a higher density core providing a good level of sound insulation. It is effective on thin walls and ceilings making it very useful in blocks of flats. It is most often used in conjunction with mineral wool and various sound proofing fixing methods such as resilient bars which keep the surface of the board slightly away from the surface they are on to prevent the passage of sound vibrations. See our projects on soundproofing.
Fire board which has glass fibre and other additives in the core to protect against fire in most domestic situations. Usually fire resistant plasterboard comes with a pink face which can be painted or plastered.
Water resistant board which has water repellant additives in the core making them suitable for a base for tiling some wet areas. This type of plasterboard usually comes with a green face and is not usually plastered. They are excellent for high humidity areas but, as all gypsum plasters soak up moisture quickly, it would be counter productive to plaster them.
Impact plasterboard which has a very dense core designed to resist impact and day to day knocks.
Most of the above boards are available in taper edge and vapour check and all can be used in a dry lining situation . Look at the related projects list on the left of the page where you can find other plasterboard related projects.
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ADHESIVES USED AT HOME & FIXING CURTAIN POLES
cold and damp spots
COVING - Transform your ceiling
Cutting and fixing plasterboard.
Drylining
FIXING CURTAIN POLES & RAILS
Fixing to Ceramic Tiles
FIXING TO HOLLOW DOORS
Fixing to lathe & plaster
Loft Storage
PAINTING NEW PLASTER
Partition Walls and Plasterboard
PLASTERBOARD FIXINGS
PLASTERING AND PLASTERING COURSES
PREPARING NEW PLASTER FOR WALLPAPER
Removing asbestos safely
REPAIRING HOLES IN PLASTERBOARD
REPAIRING LATH & PLASTER
Skim or top coat plastering
Types of Screw: Where to use different screws
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