![]() ![]() Because a skim coat is a type of texture, you normally don't need one if you're applying a different type of texture, such as a knockdown or eggshell. It's also good to skim coat if you paint the walls with a gloss or semigloss paint, because reflective paint tends to exaggerate defects. It's especially desirable in areas of critical lighting, such as the upper parts of walls under a skylight or a hallway with a light source that shines obliquely on the walls. Skim coating can be a time-consuming process, and it isn't always necessary. Skim coating works best if done in thin layers, so if the wall is lumpy or has an existing rough texture, it may take more than one skim coat to flatten it. You trowel the mud on with a drywall knife or roll it with a roller and then immediately scrape the wall with the knife, leaving only a smooth layer behind. The process is simple, but it takes practice to do correctly. You can skim coat with mud that has the same consistency as that you use for taping, but some finishers prefer to thin it slightly with water. The only way to achieve this is by coating the wall with a thin layer of joint compound. A level 5 wall can withstand close scrutiny under a variety of lighting sources and appear flat, with no visible evidence of seams or fasteners. A level 3 wall needs a heavy coat of texture to hide the taped seams, and a level 4 wall is one that has flat seams and will appear flat when properly painted. Skim coating is the only way to achieve a level 5 drywall finish, which a number of trade associations, including the Painting and Decorating Contractors of America, recommend for areas of bright or critical lighting Finish Levelsįinish levels 0, 1 and 2, as defined by a Gypsum Association document, are appropriate for areas hidden from view, such as attics, garages and unfinished storage spaces. Drywallers use this technique to hide an imperfect taping job, to give the wall a plaster-like appearance and in situations when only the smoothest surface will do. For more info, check out this post that includes a section on taping and jointing.Skim coating is a texturing technique used to make a wall smooth. Once again, screen tape is your best option for masking joints. If so, you’ll want to cover the joints between the boards. Pro Tip: You might need to plaster straight onto freshly erected plasterboard. You might need to get a little more creative in some cases, as The Carpenter’s Daughter did when plastering a wall with chased cables. Small holes can be patched with Polyfilla, and you can cover cracks with screen tape. You also need to fill or cover any holes or cracks in the surface you’re going to plaster. A quick going over with a rag and some sugar soap should suffice. Your next job is to remove any dust or grime from the area you’re going to plaster. For more info on reducing the mess, check out this guide on painting with no mess. ![]() No matter how careful you are, plastering is a messy job. You’ll also want to cover anything you can’t move out of the way with a dustsheet. You should remove as much furniture from the area as possible to give you room to work. You must prepare the room in advance if you do any significant plastering. The process is pretty straightforward and involves the following simple steps: 1. Now you know why PVA is so beneficial for plastering, you’ll want to know how to use it. ![]()
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