Decorating the Home Exterior
Even the most drab home exterior can be quickly transformed, using one of the many available decorative wall finishes. Materials which can be used to give your home a ‘face lift’ vary from simple exterior paints to more elaborate surface finishes, providing a wide choice of both colour and texture.
Masonry and stone paints
Rendered surfaces can be improved by the application of a paint coat. The most satisfactory type is masonry paint. This is waterproof and so is protective as well as decorative.
Some types dry to a smooth surface which facilitates easy cleaning. Before using a masonry paint, brush the surface down thoroughly with a wire brush and apply a masonry paint sealer.
Among many types of masonry paints are those reinforced with minute, short nylon fibres, which fill minor imperfections, or paints which incorporate minute particles of crushed rock. One type has a vinyl-resin base and is available in a range of colours or a two-tone mix.
Some paints are applied by brush, and others with a steel trowel.
With such surface coatings, large imperfections in external rendering must be hacked back and filled with a mix of the same consistency as the surrounding area, otherwise stress will occur between the two surfaces.
Exterior-grade emulsion can be used to decorate external walls. Available in a wide range of attractive colours, it provides solely a decorative finish and has no waterproofing properties.
Some types of applied rendering, such as shingle dash, snowflake and Tyrolean finishes do not need painting, unless you wish to change the colour. Normally, their attraction lies in a two-tone colour or textured effect. Rough-textured surfaces may be difficult to cover, as the paint has to adhere to the stone and crevices of a cement mixture.
Roughcast, which incorporates shingle in a mortar mix, does need a decorative finish, either a waterproof paint or emulsion. If using emulsion, a colourless water-repellent sealer can be applied before the emulsion coat.
Before starting work, mask surrounding paintwork, window frames, pipes and secondary roofs. Also, remember to protect paths as spilt paint may be difficult to remove.
A large brush or roller can be used to apply a decorative coat to rendering, other than on a roughened cement finish. Cement finishes should be applied with an expendable brush as, once used, it is impossible to clean off the hardened cement.
A stiff nylon brush must be used on a very rough textured finish to push the paint into the crevices.
10. November 2011 by admin
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