To sum it up, drywall can be a complex, and multi- stage process, requiring two sets of hands and an accurate eye, and careful consideration to be successful. For this reason, it is not often the small repair” some people expect to have completed quickly, and can cost between $250 and $850 or more, for the post leak repair described here. Hopefully, if you misunderstood the proper steps of drywall before you now can help prepare yourself to site and correct leaks long before they become disasters inside walls and ceilings of this magnitude.
If the bead is dented, use a metal-cutting hack saw to cut through the bead above and below the damaged area (image 1). Then use a utility knife to cut vertically around the corner bead (image 2). Corner bead is usually attached with drywall nails, so use a pry bar or claw hammer to remove the fasteners. Place a taping knife or thin plywood behind the tool to prevent additional damage to the wall — be especially careful not to lever against unsupported drywall or the tool will punch a hole that will require a more extensive repair.
Sanding drywall compound produces a fine dust that gets onto and into everything. Because it is water-soluble, wiping the dust with a sponge makes a royal mess! By collecting the dust at the work area, either through wet sanding or through use of a vacuum, you eliminate much of your cleanup. Since small holes generate small amounts of dust, these simple methods are more than adequate.
Picture hooks and screws can be used to hang lighter items on any type of wall in just about any location without the need to search for studs. To be on the safe side, I would recommend this method only for items weighing no more than 10 to 12 lbs and prefer to keep them closer to half that, although picture hooks are available for up to 25 lbs and more.
Larger holes in a wall require a patch made of drywall, which is also commonly referred to as wall board or gypsum board. The key to this type of repair is to make sure your drywall patch is the same thickness as the drywall used in your wall. The drywall in most homes is ½-inch thick. But double check the thickness of your existing drywall before heading to your local independent home improvement retailer. This is one time when it’s handy to have a hole in the wall.