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  • Drywall, also known as Sheetrock™ or gypsum board (Sheetrock is a trademark name of USG), is used to cover the interior walls of the structure.
  • The gypboard panels nailed or screwed to the studs.
  • Drywall contractors price the job by the square foot. A good rule of thumb is to multiply the floor square footage of the house by 3.33 to get a good estimate of the square footage of the drywall required.
  • Drywall is hung after wall insulation is installed and inspected.

Installation

Drywall panels are 4' wide and between 8'-15' long. 1/2" or 5/8" thick panels are used in residential construction. The lengthwise edges are tapered to accommodate joint tape and compound.
The panels are cut to length to fit the room with the least number of butt joints The joints are taped and finished. Texture is applied to the surface (if desired) to give the wall and ceiling surface depth and to hide flaws.
Drywall is made of a unique mineral called gypsum. Some of the characteristics of gypsum are, it is extremely fire resistant, it forms an effective sound barrier, and it is strong and stable under temperature and humidity variations. Fire resistance is the most important characteristic of gypsum.

Here are the steps to installing drywall:
  1. Gypboard (drywall panel) is hung using screws
  2. Corner bead is attached on all outside corners and around windows if they are to be finished with drywall.
  3. All joints are taped with paper tape and joint compound
  4. A second coat of compound is applied over the joints
  5. A third or finish coat is applied over the joints.
  6. After each coat of compound is applied the joints are lightly sanded.
  7. Texture is applied to the ceiling and walls. Texture is applied with a texture gun and/or by hand with a trowel or other implement.


If you are hiring a drywall contractor, go through the sub-contractor check list. Discuss specifically the items listed under the contract and specs section. Find out what is included in the standard package and what the upgrades are. For example, square corner bead is usually part of a standard package, and bull nose corner bead is an upgrade. Ask your sub about the latest trends and styles in drywall and texturing applications.

Contract usually includes the following:
  • Price for the job.
  • Description of the work (include upgrades and itemized costs).
  • Cost for change orders.
  • Hourly rate for work that is not included in the contract.
  • Number of days to complete the Work.

Specs (description of materials) that are usually included with contract:

  • Type of corner bead
  • Drywall treatment around windows (whether drywall will be wrapped around windows on how many sides).
  • Ceiling finish
  • Wall finish
  • Type and thickness of Drywall installed.
  • Areas where Type "X" Drywall will be installed. Type X is an extra fire resistant gypsum panel.
Inspection
The purpose of the three step taping process is to seal the joints adding shear strength to the panels. The joints should be smooth and indistinguishable from the panel when painted. Run you hand over the top of a joint to check for smoothness. Check the texture for consistent pattern and distribution. Look for bare spots.
Around window that are wrapped with sheetrock check that the thickness of the frame is equal on each side.

Before the drywall can be hung the roof must at least be dried in (covered with building felt) or rain could be disastrous to the drywall. While the drywall is being hung and taped, the exterior of the building is being completed concurrently. See schedule for details about phase 4

Money Savers
Decide what options you want and stick with them. Making changes later often incurs a change order cost.

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