![]() Curing of PlasterĬuring the repaired area is not required as the REPAIR MORTAR is self curing. REPAIR MORTAR can be applied to the surface and finished to match with the surrounding old plaster. The surface is washed and cleaned and needs to be kept moistened for repair. The dust and lose particles need to be cleaned off. In the case of concrete surfaces, the old plaster has to be thoroughly scrubbed with a wire brush after the plaster had been cut out, and the area needs to be pockmarked to roughen by a wire brush. The surface is then thoroughly washed with water to moisten the surface to enable good adhesion of the repair mortar. The raking is carried out uniformly with a raking tool, and loose mortar is dusted off. The masonry joints which become exposed after removal of old plaster are raked out to a minimum depth of 10 mm in the case of brickwork, and 20 mm in the case of stonework. The edges of the chiped area need to be slanted to form an undercut to provide a neat joint. The patch has to be cut out in a square or rectangular shape around the crack or void where repairing is needed. This needs to be chipped and removed first. The patch of plaster, where the wall has cracked will normally sound hollow when gently tapped on the surface. Slaking of lime particles present in the plaster Voids and chipping caused due to the impact when furniture is moved around the house ![]() Hairline cracks caused due to moisture evaporation, delaminating crack due to plaster pulling away from the lath behind it, and settlement cracks due to building structure settlement. Table 1 Common plaster wall problems and their causes Types of plaster wall problems By doing this, the most suitable technique and equipment can be employed to repair the damage and therefore achieve the desired result. The type of damage shall be ascertained prior to the commencement of repairing operation. The repairing process of plaster walls is presented in the following sections. The most common problem with plaster walls is crumbling, water damage, cracking or pulling away from the lath behind it. There are several ways in which to repair lath and plaster - using modern or traditional techniques, or by learning how to patch plaster.Repairing of plaster walls is needed from time to time as the building ages. If, on the other hand, large chunks of your wall or ceiling are coming away, more significant repair work will be necessary. Simply check them regularly and keep an eye on any new cracks that appear - often simply skimming over them with a suitable, lime-based, plaster mix is sufficient. ![]() Of course, if your walls are still in good condition, there is no need to touch them. ![]() If you live in a house with lath and plaster walls (likely if your house was built before 1940) then you might be wondering how to repair damaged lath and plaster. How do you Repair Lath and Plaster Walls? These mixtures usually used a 1:1:6 combination of gypsum or cement, lime putty and sharp sand for the initial two coats, then equal parts of lime putty and gypsum for the final layer. Later on, it became common to add in gypsum or sometimes cement - this was to speed up the setting process between each layer. The third layer was commonly made up of lime putty and a fine sand in a 3:1 mixture - or sometimes just lime putty. The first two layers of plaster that were applied to the lath were usually made up of lime putty and sharp sand in a 1:3 ratio - often with animal hair added in to help bind them. (Image credit: Getty) What Type of Plaster Was Used For Lath and Plaster? ![]() Lath and plaster walls were commonplace in house right up until the advent of plasterboard in the 1930s. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |