Drywall tape, also known as joint tape or paper tape, is an essential material used in drywall installation and finishing.
Typically made of paper or fiberglass. Paper drywall tape is more common for general use, while fiberglass tape is often preferred in areas where there is more moisture or a higher risk of movement.
Some drywall tapes have an adhesive backing that helps them stick to the drywall surface. Others rely on joint compound to adhere.
Drywall tape needs to be strong enough to hold the joint compound in place and prevent cracks from forming as the drywall expands and contracts with changes in temperature and humidity.
The primary purpose of drywall tape is to cover the joints between drywall panels. This creates a smooth surface for applying joint compound and helps to prevent cracks from appearing over time.
It is applied over the seams and then covered with several layers of joint compound to create a seamless finish.