Ensure the wall has been allowed to dry out fully before applying plaster.Always treat the cause of any damp problems, not the symptoms.Soot staining from flues can often be seen on the surface above a fireplace. If these continue to come to the surface, plaster may have to be stripped. Where damp is present, salts may pose a problem. Unlike modern plasters, lime plasters that have become wet generally dry out with their integrity intact so need not be removed. Use a steam stripper to remove stubborn coatings, being careful not to allow steam to penetrate the plaster.Apply warm water or proprietary wallpaper stripper with a sponge or brush.Gently use a scraper but avoid scoring through the surface into the plaster.Always undertake a test first on a small unobtrusive area.When removing, proceed with care and be aware that wallpaper may be acting as a support to defective plaster underneath. Wallpapers, paints and other finishes can spoil the appearance of plaster surfaces and may trap moisture. Where the bond with laths has failed, reinforce by pouring fresh plaster from above and strengthening with a jute scrim set into this and secured to the joists. ![]()
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