How to Apply Joint Compound

After drywall has been mounted inside of a home, joint compound must be used to seal the small gaps and crevices between the sheets. Joint compound is commonly referred to as "mud" within the home construction and contracting trades. There are three different types of the compound, all-purpose, which is used for taping and to create texture on a wall; topping, used for first and second coat applications; and quick-set, often applied when rapid drying is necessary. For general use, an all-purpose mud will suffice.

Joint knives
Joint compound
Drywall tape (also known as joint tape)
Fine-grade drywall sandpaper
Sanding block

Instructions

- 1
  Mix your joint compound if necessary. Most all-purpose compounds are ready-mixed and can be applied immediately, but some brands may require water to be added. Refer to the specific instructions on your container of compound.
- 2
  Scoop a generous amount of compound out of the container and apply it to the seam or hole requiring patching.
- 3
  Pack the compound into the seam or hole using the blade of your joint knife. Add more compound until the area appears to be sufficiently filled.
- 4
  Scrape the compound smooth and even by angling the blade of your joint knife and dragging it away from the seam or hole.
- 5
  Repeat Steps 2 through 4 for each seam or hole requiring compound application.
- 6
  Allow the compound to dry and cure for 24 hours, or the time recommended on the container, before sanding smooth with fine-grade drywall sandpaper. Wrap the sandpaper around a sanding block for more efficient sanding.

How to Texture Over Wallpapered Walls

Proper Installation of Fiberglass Insulation

Wall Repairs