To be sure you can use the mud before it sets, start with about a cup of powder.Īdd about a half cup of water and mix the mud so it's thick enough to remain on a joint knife when held upside down. Use a 2 to 1 ratio of powdered compound to cool, clean water. Use a mud pan to mix small amounts of mud at a time for skim coating. It's easier to spread than setting-type, allowing for a thinner application and it's soft, making a smooth finish easier to achieve when sanding.Ĭlose Window Mixing Setting-Type Joint Compound Ready-mixed is also good for the final coat over any skim coating job. Use ready-mixed compound for finishing drywall and for minor wall imperfections requiring one or two coats to cover. Use a relatively slow setting compound like Durabond90® for big jobs like this. This would include any water-damaged plaster or drywall, and very rough surfaces like drywall textures that will require several coats of mud to smooth out. For most major damage, the best choice is setting compound. Which compound to choose depends on the surface to be skimmed. It takes several hours to dry and is soft compared to setting compound. Ready-mixed joint compound comes wet and ready to use out of the bucket. It comes in setting rates of a few minutes to an hour or more. Setting compound is a powder that sets to a very hard finish when mixed with water, similar to the way concrete sets. Here’s the next part of the video where the skim coat is finished.There are two types of joint compound that can be used for skim coating: setting-type joint compound and ready-mixed joint compound. ![]() It doesn’t need to go on as thick as the first one. If you want, a smaller roller like a ¾” roller works great for a second coat. Repeat steps four and five for your second skim coat. Let the paint dry for a few hours before starting your second coat. Repeat this process until you’re completely done with your first skim coat. Scrape any excess paint into your mud pan and repeat until your wall is finished. ![]() The goal is to end up with a smooth surface. You want to remove all the lumps of paint and any small bumps on the wall. Take your putty knife and scrape off the excess paint.ĭo this for the entire section that you just painted. The coat you applied with a roller won’t look smooth. But one person should be able to do both just fine. You can have a friend help you skim or paint to be safe and speed up the process. This can ruin a project quickly, so make sure you watch the paint carefully. But if the paint starts to dry, you won’t be able to skim anything. In the next step, you’ll need to skim the paint with a putty knife. If you’re painting a big wall, paint it in sections. So you’ll have less sanding to do with a thinner joint compound.Īll you have to do is dip your roller in the paint tray and start painting the wall. Thicker joint compound often requires a lot of sanding because it doesn’t apply as consistently as a thinner coat. It will get rid of the bumpy knockdown texture or other rough patterns on your wall or ceiling. Two coats also ensure that your wall has a smooth and glossy texture. The thinner joint compound makes it easier to apply the coat. Since we thinned the joint compound with water, we’ll apply two skim coats. Just add water until you get a yogurt-like consistency. This isn’t something you need an exact formula for, though. The video below recommends emptying out half of your joint compound and adding about four cups of water. Thin out your joint compound.Ī skim coat is a thin coat of paint, so you’ll want to thin out your joint compound with some water. ![]() Any other exposed areas inside your wall, like electrical wires, need to be taped off as well. Typically this includes outlets and the top of baseboards.
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