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Coloured Rendrering

Rendering refers to the process of adding a coating to either an exterior or an interior wall to improve its appearance and to hide any surface cracks or blemishes. There are two different types of coloured rendering, the first is where a recently rendered wall is then painted and the second is by the use of a pre-coloured rendering material. The most used type of pre-coloured rendering material is known as Monocouche More recent building practices have identified certain problems that can occur when walls are rendered and then painted. Rendering can make exterior walls look more attractive and it can also add to the insulation and sound proofing properties of a building.

Rendering Problems

For many years exterior walls have been given a cement or stone rendering, and more recently an acrylic rendering. When a cement or stone render is applied it is left to dry out before any further work such as texturing or colouring is done. Traditional rendering can take up to four weeks to dry out before it can be painted. Rendering is often undertaken to disguise imperfections in a wall’s surface but some renders can cause problems as they inhibit the expulsion of water vapours from brickwork.

Rendering and Water Vapour

When water vapours become trapped the brickwork underneath deteriorates and sometimes rendering can become detached from the wall’s surface and has to be removed and replaced. When walls are rendered and then two coats of masonry paint are added to colour the rendering, this means that the wall underneath cannot breathe and this causes problems. More modern coloured rendering does not present the same problems as in the past because it is much lighter and does not require additional colour from masonry paint.

Monocouche Renders

Monocouche just needs a single application for a coloured rendering of exterior walls. Monocouche is a spray applied plastic rendering that comes in a wide range of colours, because the colour is already in the rendering material, there is no need to wait for the render to dry and no need for painting. Cement and stone rendering is usually applied with a brush or trowel, so is much heavier and takes longer to apply. Monocouche coloured rendering sets much more quickly than cement or stone renders, in a matter of days rather than weeks and because it is much lighter than either cement or stone, this type of coloured rendering allows the brickwork to breathe. It is perfectly possible to have a textured or decorative finish with Monocouche coloured rendering and the material ages well and lasts for a long time. Unlike older rendering processes, Monocouche coloured rendering requires very little maintenance and will not harm the surface underneath as other renders have been known to do. Because Monocouche rendering is sprayed on, it takes less time and can therefore save you money. If you only want a small area to be covered in Monocouche then it may need to be applied in the usual way with a brush or trowel.

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