paintwork
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paintwork [2021/03/28 20:53] mark [How to fix] |
paintwork [2021/03/28 21:02] (current) mark [How to fix] |
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| Where modern masonry paints have already been used, remove any loose or flaking paint by scraping or wire brushing. Any mould or fungus growth must be removed using a proprietary anti-mould treatment according damaging stonework or flooding the inside of the building. Normally a pressure water wash is only allowed up to 200psi; any higher and consent is required. Make sure that the wall has dried out completely before repainting starts. | Where modern masonry paints have already been used, remove any loose or flaking paint by scraping or wire brushing. Any mould or fungus growth must be removed using a proprietary anti-mould treatment according damaging stonework or flooding the inside of the building. Normally a pressure water wash is only allowed up to 200psi; any higher and consent is required. Make sure that the wall has dried out completely before repainting starts. | ||
| - | === For Traditional Construction === | ||
| - | Limewash and lime-harling are specialised products and although less simple to use than modern masonry paint, give a most attractive appearance. You should get specialised advice before using these materials. | ||
| === Paintwork on traditional mortar (Lime harling) === | === Paintwork on traditional mortar (Lime harling) === | ||
| - | Paint should be replaced by limewash. | + | Paint should be replaced by limewash. Limewash and lime-harling are specialised products and although less simple to use than modern masonry paint, give a most attractive appearance. You should get specialised advice before using these materials. |
| + | === Re-painting For Modern Construction === | ||
| + | For Heritage Building built in 20th Century a different approach is needed. | ||
| + | There are three main types of masonry paint available today. | ||
| + | a) Water-borne ones use modern acrylic emulsions and are easy to apply by brush, roller or spray. | ||
| + | b) Solvent-borne ones use a synthetic rubber resin and last well, but release a lot of Volatile Organic Solvents (VOCs) when they dry to the manufacturer’s instructions. e.g. Pliolite ® resin paints VOCs – Volatile Organic Solvents, which contribute to atmospheric pollution. e.g. the Scottish Lime Centre, 01383 872 722 , www.scotlime.org | ||
| + | c) A group are called ‘silicate’ paints and although not traditionally used in this country, have been used in Europe for over a century with good results. | ||
| === Paintwork on modern cement === | === Paintwork on modern cement === | ||
| Where possible, modern cement render should be removed and replaced with traditional lime harling. Having done that, use the advice below regarding paintwork on traditional mortar. | Where possible, modern cement render should be removed and replaced with traditional lime harling. Having done that, use the advice below regarding paintwork on traditional mortar. | ||
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| ===== Avoiding creating problems ===== | ===== Avoiding creating problems ===== | ||
| + | It is difficult to give advice on such a variety of different external surfaces, but the general principle is never to paint dressed stone surfaces and to use traditional materials like limewash to decorate harled surfaces. | ||
| + | |||
| + | The ingos of doors and windows | ||
| In Georgian properties, paint should never be used on masonry. Wherever existing paint on masonry needs to be renewed it should be replaced by limewash. Limewash allows walls to breathe and protects the underlying masonry. | In Georgian properties, paint should never be used on masonry. Wherever existing paint on masonry needs to be renewed it should be replaced by limewash. Limewash allows walls to breathe and protects the underlying masonry. | ||
paintwork.1616957634.txt.gz · Last modified: 2021/03/28 20:53 by mark
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