![]() Using a dry paint brush brush along the line of the crack to remove any loose dust and dirt. Try to undercut the crack with the corner of the scraper to give a better key for the filler. The corner of a scraper or filling knife is ideal for removing any loose plaster and for opening up and deepening the crack. ![]() Small cracks in plaster should first be widened so that filler can be pushed right in and has something to key on to. Most small cracks will easily be covered by normal wallpaper but when walls or ceilings are to be painted with ordinary paint, the cracks will need to be filled before painting and this article deals with filling small cracks for this purpose. These cracks are not usually structural and can be hard to cover. These cracks can often look quite bad as they can cover quite large areas. In some older properties, the joints of plasterboard used for ceilings was sometimes not 'taped' before they were skimmed with plaster and this can lead to cracks where adjacent sheets meet. Any long cracks wider than about 3 mm, or where something thin can be pushed deep into the crack may again suggest professional assessment is obtained.Cracks which go in definite horizontal or vertical straight lines, or which go in a stepped pattern could indicate something more serious and a professional assessment should be obtained.Small (up to 2mm) cracks taking random directions, these are probably just 'drying out' cracks and do not usually indicate any problems with the basic structure.For cracks in walls the cracks are generally: Knowing the signs which may indicate something serious and when professional advice should be sort. Small cracks often appear in plaster walls and ceilings, usually these are nothing to worry about but it is always worth Repairing cracks - repairing chipped plaster corners ![]()
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