![]() If it goes in with ease, then it's drywall. The plaster will generally be more laborious than drywall.Īn easy way to determine is to try to hammer a nail into the wall. You are determining what material your walls are made of in your home can sometimes be hard to identify. ![]() There would then not only be a section of drywall present, but it may not have also been insulated correctly, which can add to condensation issues.īottom line: If a home has plaster walls and repairs have been made, plaster should be put back up! How To Tell The Difference Between Plaster and Drywall The problem is when a repair has been made on an older home that has plaster walls it is possible the person doing the repairs replaced a section of plaster with sheetrock and painted it. This has really been the cause of the 1970s or so going forward. Drywall is cheaper and easier to install. Plaster is not the preferred choice of most contractors this day in age. Plaster is a much better fit to deal with water compared to drywall. Older homes built in the beginning to the middle part of the 20th century were mostly built without any cellulose-based materials on the walls. Be Careful Of Drywall Disguised As Plaster If an area has been significant water damaged, the integrity of the wall also has to be taken into consideration. While mold is absolutely a worth reason to remove a plaster wall, it's not the only reason. If the area has gotten wet for an extended period and not properly dried out, just like any other building material, the plaster should be removed so inside the walls can be thoroughly cleaned. To get rid of the mold within the walls, of course, you need to take the plaster covering down. The water, with the salt now contained in solution, migrates to the surface, then evaporates, leaving a coating of the salt.Įfflorescence is non-toxic and easy to clean up. The essential process involves the dissolving of an internally held salt in water, or occasionally in another solvent. In chemistry, efflorescence (which means "to flower out" in French) is the migration of a salt to the surface of a porous material, where it forms a coating. If you don't know what efflorescence is, it can be described by: There is a strong possibility that this is not mold but efflorescence. If you are noticing a white powdery substance in an area that got wet, there may not be any reason to panic. If there is wood or drywall, you may very well have a mold problem inside your walls. ![]() So, The most crucial aspect to consider is never the plaster itself but what is behind it. Wood under wet conditions can allow mold to grow and thrive on it. ![]() If you dig hard enough in a large percentage of homes in the world, you will find wood inside the walls. Homes are commonly built with a certain amount of wood. Many different materials can be used as a base behind the plasterboard, and most of them are porous, which, if it gets wet under the right conditions, mold can grow and thrive within the wall cavity. Although plaster does not support microbial growth, if porous cellulose-based material such as drywall is used on the backside of the plaster for support, mold can grow on the drywall. Mold does not grow on plaster because plaster is non-porous and lime-based or clay. Get A Free In-home Estimate Or call 1-86 Why Can't Mold Use Plaster As A Food Source? ![]() Mold growing on plaster walls is growing on the surface of the plaster is likely growing on the paint or dust on the walls. So, when it's said mold does not grow on plaster, it generally means mold will not start eating plaster an off-gassing letting off Microbial Volatile Organic Compounds (MVOCs) causing humans to get sick. What is true is that mold does not use plaster as a food source and will only be on the surface. Mold can be found on many surfaces under the right (or wrong) conditions. It is a common belief that mold cannot grow on plaster. ![]()
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