Anyone can learn how to skim sheetrock, but the problem is the quality of the job must be high in order to look good. Skimming sheetrock is a process that can hide a number of wall problems effectively. The key is to skim the sheetrock with a very thin coat of sheetrock mud in order to hide wall defects or taping.
Skimming sheetrock can be a big or small job depending on why you need to do the job. Skimming is the application of a thin coating on the wall in order to fill in and hide imperfections. In some cases this means repairing a hairline crack, but skimming is also used to repair whole walls.
How To Skim Sheetrock
The reason you need to know how to skim sheetrock is so you understand when it's useful as a repair technique. When walls are in poor condition which includes peeling paint and damaged sheetrock, skimming can make the walls uniform again. It's used in rooms where there's either been a lot of damage or in homes that are old and in need of repair.
Contractors know how to skim sheetrock, because the technique can be used to hide a number of flaws in new construction or during remodels of older homes. When hanging new sheetrock, it can be dented by accident in a number of places or it has manufacturing flaws. By applying a thin coat of sheetrock mud over all the walls, a uniform appearance is created so the walls look nice and even.
In fact, skimming sheetrock can make walls look so nice that some contractors or homeowners have it done on brand new walls. The layer of mud is approximately 1/16 "thick which explains why it's called a skim coat.
Contractors also know how to skim sheetrock in order to repair wall cracks. The crack is filled with compound and then skimmed to blend the crack filling with the rest of the sheetrock. The sheetrock tape goes over the skim coat; a layer of mud is applied and then sanded. Once again, the skim coat of mud is intended to give a uniform appearance to the wall.
Applying a skim coat of mud to sheetrock is best left to remodelers with experience. The whole purpose of skimming is make walls look new, so if it's not done correctly, the original purpose is defeated.
For more information on how to skim sheetrock