Drywall - Drywall Contractors
Sonoma County, San Francisco North Bay, Ca. USA 

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As opposed to a week-long plaster application,

 an entire house can be dry walled in one or two days by two experienced drywallers, and drywall is easy enough to use that it can be installed by many amateur home carpenters. In large-scale commercial construction, the work of installing and finishing drywall is often split between the drywall mechanics, or hangers, who install the wallboard, and the tapers and mud man, or float crew, who finish the joints and cover the nail heads with drywall compound.

Drywall is cut to size, using a large T-square, by scoring the paper on the front side (usually white) with a utility knife, breaking the sheet along the cut, scoring the paper backing, and finally breaking the sheet in the opposite direction. Small features such as holes for outlets and light switches are usually cut using a keyhole saw or a small high-speed bit in a rotary tool. Drywall is then fixed to the wall structure with nails, or more commonly in recent years, the now-ubiquitous drywall screws.