plasterboards

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napper83

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Plasterboard types
Wallboard or plasterboard is a flat panel of gypsum, sandwiched between stiff lining paper. It comes in several types and sizes and is ideal for timber framed buildings, loft conversions, stud-partitions and ceilings. The most common size is 2.4m by 1.2m and is grey or ivory faced, an usually have tapered edges these were originally designed for taping an jointing and square edged boards for plastering although you generally don’t see square edged board on building sites now they are still available to buy.
The boards are available in thickness of 9.5mm, 12.7mm or 15mm. Boards measuring 900mm x 1200mm and 1800mm x 1200mm are commonly stocked. Longer lengths of 2.7m and 3.0m can be ordered.
Plasterboard and wallboard is available with a vapour barrier, a thin metallic, tinfoil-like backing. These are used in timber framed buildings and as a sheathing where moisture could be present.


Theses are some specialist board which may have to be ordered in :
Duraline - Impact protection - yellowish colour surface (prime before skimming)
Soundbloc - Sound insulation - Blue colour surface
M.R Board - Moisture resistant - Silicone green liner (bond-it or wba before skimming)
[b[Fireline[/b] - Fire resistant - Pink colour surface


Measuring cutting and scribing plasterboard
To cut plasterboard to size ...
Measure the opening at the top and the bottom
Transfer the measurements to the face side of the plasterboard
Hold a straight edge on the measurements marked
Using a trimming knife, run the blade down the edge of the straight edge, cutting through the layer of lining paper and into the gypsum.
Stand the sheet on its edge and snap it at the cut.
Fold on the cut and run the knife up the fold from the other side, cutting the backing paper.
Run a surform over the edge to knock off any bumps


To scribe plasterboard
This is when you have to fit a board into an uneven opening.
Measure the opening at its widest point.
Cut the plasterboard parallel at this width.
Hold the cut edge of the board, plumb and inline with the opening at its narrowest point.
Using a small block of wood the same width as the widest point of the opening as a gauge, scribe a pencil line down the board parallel to the wall.
Cut on this line. If the line is all over the place use a pad saw to cut


Fixing boards to Studwork
When nailing plasterboard, use purpose made plasterboard nails - these are galvanised or zinc coated, round head nails. They will not rust and spoil the décor at a later date. Always give them that last tap, to ensure they dimple the surface of the plasterboard. This is to prevent them catching the edge of the trowel and to allow plaster coverage.
You can also use plasterboard or drywall screws. Although moderately more expensive, they tend to hold the board more firmly. This is particularly helpful when boarding both sides of a stud wall, where hammering the second side might loosen the nails on the first side.
General sizes are 30mm for 9.5mm boards and 40mm for 12.7mm boards. Nail at approx 150mm centres.check that no pipes, cables or other services run behing the proposed fixing points.
 

flynnyman

Well-Known Member
there are boards 6mm thick that are used mainly on curved walls or when there is a minimum thickness to work to and there are 9.5 sometimes refered to as 3 eighths, 12.5 sometimes referered to as half inch then 15mm sometimes refered to as heavy bastards........lol Sound block are also heavy and quite hard to cut especially a small strip a little tip cut both sides before you snap and it will cut easier.
 
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