subject: Liverpool Plasterers [print this page] In order to correctly plaster a wall, you simply need the materials and the right infomation. Plasteromg on the whole is quite a simple task, as you will soon find out, and all those holes in your wall will be gone. Often a three coated application of the plaster is needed to reconstruct a wall. Some expertise is required when applying plaster. The plaster should support the surface and hold its own weight without cracking. The surface should become smooth and hard once this is done and the finished surface will then be suitable for painting or papering.
Firstly, a two coarse or rough coats are applied to start the three-coat plaster system. These coats are a combination of lime or aggregate, gypsum, fiber and water and this makes up the base of the wall. Most commonly, aggregate used in rough-coat plaster is sand. We get lime from limestone or ground down oyster shells. Gypsum often is replaced for lime, this is because its drying time is much quicker. The first coat, which is called a scratch coat, because a comb scratches the surface to make it rough. The brown coat is the second coat and this is applied directly to the scratch coat only. The sand gives a rough texture to the coat. The final coat is a fine mixture concoted by the plasterer, is a traditional lime finish coat. Lime putty is also prepared on the mixing board that the plasterer creates is a circle of putty, which is banked up like a swimming pool.Water is then poured into the board and then the plasterer sprinkles it with plaster.
The plaster and lime then mixes itself. Once the slaked lime stops giving off heat, this means that the mixture is ready to be mixed into the putty. And this lime putty is the final coat of the plaster. This gives the wall a hard and shiny finish coat. Plasterers often Plastering a wall, not only depends on the lime putty which is applied to it, but also the surface that it is applied to. The strength of the adhesive and skill of the plasterer depend greatly on this. The brick surface must be treated before the plastering begins. Therefore, every plastering job is unique to each wall. Overall there are two main types of plasters. The gypsum based plaster and the cement based plaster. Cement based plaster is usually used for outdoor work. Gypsum based plaster is used for indoors.If plastered outdoors, it would most likely become damp and the plaster would crumble. Common types of gypsum plaster include. These are browning, bonding and metal lathing plasters.
Modern plasters are available ready made, mixed with perlite, vermiculiute and several other additives. These help to make the wall fire resistant and improve insulation. Good clean water only needs to be added to the plaster before you can use it. When a plastered wall is complete, if it has differing absorption, it is best advised to use a bounding sealer in order to key the surface to be plastered. This ensures a good, smooth and clean finish to the plastered wall. This advice comes from Liverpool plasterers, the leading plaster specialists in the Merseyside area. If you require plastering, call our number for a free estimate.
