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2011K4
Plaster
| Term | Definition |
|---|---|
| This is a base or backing coat plaster, and is normally grey or pink in colour. It is suitable for use on surfaces such as common bricks and building blocks. | Browning |
| This plaster can be used on dense, not very absorbent materials such as engineering bricks or surfaces that have been treated with PVA. This should be applied in layers of about 8mm in thickness. | Bonding |
| This fine plaster is applied over the top of either bonding/browning. It is normally applied as a final coat and is about 2mm thick. | Finishing |
| This fine plaster is only for use on plasterboard and cannot be used on browning or bonding plaster. It is normally applied as a final coat and is about 2mm thick. | Board finish |
| This fine plaster is only for use on plasterboard and cannot be used on browning or bonding plaster. It is normally applied as a final coat and is about 2mm thick. | Board finish |
| This traditional plaster is able to withstand a certain amount of movement (without cracking) and may often be specified for use in older buildings. It is also porous and allows moisture to evaporate. | Lime plaster |
| This traditional plaster is able to withstand a certain amount of movement (without cracking) and may often be specified for use in older buildings. It is also porous and allows moisture to evaporate. | Lime plaster |
| This tool is a wide (50mm – 100mm) cold chisel used to cut bricks and blocks. It should be used with a club hammer and not a claw hammer. The striking end of this chisel can eventually ‘mushroom’ and will require regrinding. | Bolster |
| This tool is a rigid straight edge approximately 120mm wide by 1200mm long, often with a handle fixed to its reverse side. It is used to help straighten sections of wet bonding, browning or render coats | Derby |
| This tool consists of a board about 25 cm square with a perpendicular handle fixed centrally on the reverse. Plaster is normally held on the hawk then transferred to the wall by using the float. | Hawk |
| This tool is made from polycarbonate or a similar material and will normally be used to achieve a finish when rendering. | Float |
| A series of lines applied with a specially adapted float into the surface of a semi-dry base or backing coat of plaster to provide a ‘key’ to help the skim (Finish coat) adhere. | Scratch |
| This coarse sand has large, sharp particles and is used in mixing concrete. It can also be used to mix a tough, extremely hard mortar. | Sharp sand |
| This sand is finer and softer and is mixed with cement and water to produce the mortar for laying bricks and blocks. Plasterer's sand is a finer grade than sharp sand and can be mixed with cement and water to produce render. | Builders or plasterer's sand |
| This is very fine sand with a pale colour. It is used in grouting the joints between exterior paving and patio slabs. | Kiln dried silver sand |
| A mixture of sand and aggregate, often sold in pre-packs at DIY stores. | Ballast |
| Aggregate with particles less than 5mm in diameter | Sand |
| An admixture introduced to mortar in order to improve its workability. It encourages the introduction of air into the mortar. | Plasticizer |
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Construction
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