How to Use Fiberglass Tape

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Fiberglass tape is quickly becoming a drywall technician's tape of choice. It has an inherent quality to it that holds it in place without having to spread joint compound first. It is as easy to cut as the paper tape, and doesn't fall apart when it gets wet. It also adds strength to the joint compound, just as the wire mesh does for concrete.

Things You'll Need

  • Razor knife Putty knife Joint compound

Walls

  • Pull the end of the fiberglass tape far enough away from the roll to get started at the end of one joint of the drywall. Roll it out slowly while pressing it in place as you go.

  • Place the putty knife at the point where you stop applying the fiberglass tape. Hold the putty knife firmly against the tape and pull on the roll so the tape will tear at the putty knife.

  • Start the next joint as you did the first one. Repeat this until all the joints have tape on them.

  • Apply a thin layer of joint compound with the putty knife. Be certain the fiberglass tape does not move from the joint while applying the joint compound.

  • Continue this until all your tape is covered with the joint compound. Apply a second coat of joint compound before sanding.

Ceilings

  • Start applying the tape much as you did with the walls. Because of gravity, you will want to do short lengths at a time.

  • Place the putty knife at the end of your first short run. Pull the roll of tape away from the putty knife so that it tears free.

  • Apply a thin layer of joint compound to the short run. Next, begin from the end of that run and apply a new length of fiberglass tape. Repeat this process until the ceiling joints are covered. Apply a thin layer of joint compound over the tape.

  • Apply the next layer of the joint compound after the thin layer is dry. Be certain that the second layer of joint compound is smooth on the edges.

Tips & Warnings

  • Always wear safety glasses. Use the utility knife at the bottom of corner runs. Be certain the fiberglass tape is covered thoroughly before sanding the joint compound. Sand the joint compound with a fine-grit sandpaper or sanding mesh.
  • Do not work overhead without wearing safety glasses. Do not sand joint compound without wearing lung protection.

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  • Photo Credit http://www.germes-online.com/direct/dbimage/50100019/Self_Adhesive_Fiberglass_Mesh_Tape.jpg
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