On the other hand, plaster is made up of lime or a combination of gypsum powder, sand, and water. Unlike joint compound, this mixture forms a relatively thick paste. This difference in consistency is one of the most important features that sets the two categories apart. In order to decide which one to use, you must consider the application. Most people who are wondering about the difference between plaster of Paris vs. joint compound need to tape their drywall seams. If this describes you, then you are most likely looking for joint compound. Joint compound has a longer working time, which could be ideal if you are unaccustomed to taping drywall seams. It also allows you to spread a thinner coat that can be more easily sanded when the project is finished. Using joint compound instead of plaster allows you to get a smoother wall surface with less manual effort. #Dap plaster wall patch home depot painting manual# Keep in mind that joint compound is only ideal for gaps that are 1/8” or less. As it dries and sets, this drywall mud is also more prone to cracking. If you decide to use plaster, you will find that the entire project becomes more labor-intensive. However, it is an ideal product to use in small areas that are larger than 1/8” in size or areas that are prone to more cracking.īecause of the thicker consistency, you will likely have to sand it down more heavily before you can achieve a seamless finish between two sheets of drywall. Homeowners who have lots of taping to do might favor joint compound. However, small repair jobs that need a faster drying time may prefer to use patching plaster. The application tends to indicate which product is the best fit for your project. Sometimes, you might need to know how which product is the best to use for simple repairs instead of fully taping drywall seams. The answer to this one really varies depending on what the problem is. In most circumstances, plaster is going to be the best solution for a hard-to-handle problem or visible defects in the drywall.īecause it is less prone to cracking and is a thicker product, plaster can be used to cover a wide variety of surfaces, dents, and dings. #Dap plaster wall patch home depot painting manual#.The best way to repair the damage is to apply multiple layers of plaster, and in the case of large holes, it may be necessary to repair the lath underneath the plaster, too. Severe damage: When the damage to a plaster wall extends deeper than the surface layer of plaster, through the base layers or even all the way to the lath, it's likely that neither joint compound nor spackle will be durable enough to make a lasting repair.This kind of repair is typically more flexible and more resistant than patching compound to the formation of new cracks.This method is effective for cracks and for holes no more than 3 inches in diameter.
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