![]() ![]() The second layer (aka the floating coating) to be applied provided the relatively smooth finish for the third layer, this layer was typically about 6mm (1/4 inch) thick.The first layer (aka the render layer) was forced into the gaps between the laths to obtain a strong bond to the laths, this layer was typically about 6mm (1/4 inch) thick.The plaster was traditionally applied to the laths in three lime putty layers: The laths are thin strips of wood (typically about 25mm by 6mm (1 by 1/4 inch) nailed to the underside of the timber joists with a gap of about 6mm (1/4 inch) between each lath. Lath and plasterĬeilings were usually made using the lath and plaster attached to wooden joists from the early eighteenth century to the mid 1950's.Ī cross section of a lath and plaster ceiling is shown to the right. Traditional lime putty used in lath and plaster ceilings is softer than modern gypsum plasters, and the two don't work well together. When a ceiling required repair, it is important to understand the differences between the two types and know which method was used when the ceiling was erected.Īny repair will need to be carried out using the same techniques and materials as the original. In older house, lath and plaster ceilings may be countered, this technique was largely replaced by plasterboard in the 1950's. Plasterboard - widely used from the 1950's onwards.Lath and plaster - generally used up to the mid-1950's.The two of plaster surfaces commonly encountered: Lath & plaster and Plasterboard ceilings explained ![]()
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