Drywall made of large panels of pre-fabricated gypsum plaster sheeted on both sides with paper. The drywall panels are measured to fit cut and be screwed to the framed walls, it must be screwed slightly through the surface of the drywall. In order to achieve a smooth continuous surface between adjacent panels, all spaces need to be filled with a plaster like joint compound after a paper tape has been applied to each crack or space.
In addition any screw depressions are filled with the same joint compound. Wherever two pieces of drywall form right angles, light weight but strong metal angles are installed to strengthen the corners. After the joint compound dries, it needs to be smoothed out with fine grit sand paper, then a second coat should be applied and be sanded. After that, the third and final coat should follow. After all walls are dried and sanded smooth, the entire surface is painted.
A skim coat is a special finish that may be applied to a drywall, it is similar to plaster, and can be left smooth, swished etc.
It is important that a drywall will not be applied in extreme hot or cold to avoid any possibility of deteriorating. The number and sizes of gaps must be minimized. The drywall is relatively inexpensive, less inclined to crack than plaster, easier to repair than plaster, and can be installed quickly. However, the drywall must be painted and the taping of drywall sections can sometimes be noticeable.
Before the drywall invention plaster was the one and only way to finish off the home’s interior walls, it is a mud like material that is applied over plaster board lathing which supplies a secure base for the plaster to adhere. The gypsum lathe should be applied to the studs with screws. A plaster wall is more fire resistant than a wall that is surfaced with drywall, it is thicker and provides better insulation, it is more rigid and less likely to bend or buckle. There is a wide variety of creative artistic designs that are possible with plaster, however, it costs more to install, it cracks easily and is more difficult to repair.
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