![]() ![]() In this photo you can see the convex vertical plaster wall bulges and the indentations at the plaster lath-board points of nailing to the wall studs. If you shine a flashlight along, rather than directly at a wall surfaces, both regular details (such as regular, rectangular bulges in a plaster wall or ceiling) as well as irregular surfaces and defects are easily observed. The building owners were concerned for possible exterior leaks into the wall cavity and a hidden mold problem.īecause the home had experienced leaks in other areas and had other mold problems we investigated further.īut the bulged wall problem in this case was essentially a cosmetic one identified and described as plaster wall shadow effect discussed below. Shadowing bulged walls traced to gypsum lath installation: as our photos show, below, the wall in this New York home was bulged in a regular rectangular pattern. How to Identify & Diagnose Pillow Effect Bulging Found on Plasterboard Lath (Rock Lath) Ceilings & Walls We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. ![]() Page top photo provided courtesy of Minneapolis home inspector Roger Hankey. In this article series we describe and discuss the identification and history of older interior building surface materials such plaster, plaster board, split wood lath, sawn lath, and expanded metal lath, Beaverboard, and Drywall - materials that were used to form the (usually) non-structural surface of building interior ceilings and walls. Here we provide a photo guide to identifying types of plaster installed in buildings, using building ceilings as a photo and investigation guide. We have no relationship with advertisers, products, or services discussed at this website.ĭiagnose rectangular bulge pattern in plaster ceiling or wall surfaces: And you’d be surprised just how inexpensive these services cost.InspectAPedia tolerates no conflicts of interest. For this reason, most homeowners would better benefit from hiring a licensed general contractor for accurate and professional drywall or plaster wall repair services. It takes practice and a bit of handyman knowledge to do a good job. Patching up a plaster wall is not a novice job. Professional Drywall and Plaster Patching Services Wait at least 30 minutes for everything to dry. Use your sponge to touch up any inconsistencies or imperfections on the wall. Mix another batch of the lime putty mixture, this time using less gauging plaster to get a softer product that’s easier to work with.Īpply a thin and final coat over the mesh and previously-lain plaster. Leave a slight decompression for the final coat later on.Ĭut out another sheet of fiberglass mesh at a size that matches the hole and firmly press it into the wet plaster. Apply this mixture to the exposed laths and around the edges of the holes, using firm pressing motions. Use your trowel to mix all of this until you get a dough-like result. Pour some bonding agent in the center and continue to mix in handfuls of gauging plaster until you achieve the proper consistency. This ensures even re-hydration.Īpply a heap of the putty to your mixing board in a ring shape. Allow the lime to disintegrate in the water for at least 20 minutes, until a thin layer of water rests on the top. ![]() Next, prepare your lime putty by combining your hydrated dolomitic lime with water until you get a consistency similar to yogurt. Next, apply the bonding agent over the latticework, as well as, all the plaster that is to be patched or re-coated.Ĭover all of this, except for the small cracks, with your fiberglass mesh tape. Now, use your angle plane or drywall screen to smooth out the hole around the plaster. ![]() Be sure to wipe away all the loose plaster crumbs, dust, and debris. With all supplies ready to go, use the chisel to remove the old plaster from between the latticework. You will most likely need a chisel, a trowel, lime putty (combination of hydrated dolomitic lime and water), clean dry cloths, fiberglass mesh tape, angle plane or drywall screen, a bonding agent, a mixing board, and a colorless sponge. Either way, patching up a plaster wall is possible and can be done all on your own with the right tools and knowledge.įirst, gather all your necessary supplies. Other times, crumbled or soft plaster will need to be completely removed down to the latticework and to the outer edges of firm plaster, and then re-done from start to finish. Sometimes, if the plaster is firm and falls off in large pieces, they can simple be reattached and re-sealed. Plaster is applied to latticework, or laths, which are basically narrow boards or strips of wood that create a framework for a wall. Drywall Repair and Painting 31 Patching Plaster ![]()
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