What is joint tape for drywall?

06 May.,2024

 

How to Tape and Mud Drywall

Taping and mudding is the process that joins pieces of drywall into a single solid wall. Drywall tape and coats of drywall compound are applied to reinforce joints and conceal screws and nails. When taping and mudding are done correctly, the wall is flat and smooth and the seams underneath are hard to see.

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This guide details how to tape and mud drywall, the types of mud and tape to use for the tasks, and how to protect the floor and area where the mudding and taping is applied.  

What is the purpose of tape when finishing drywall?

Nope. Go ahead and try it if you don't believe me! I certainly did...

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The problem with wood frame houses is that they shift in weird ways as the wind hits them and as the foundation settles. The 8 foot long side of a standard drywall panel has a LOT of mechanical force to it if it moves even somewhat independently of the sheet next to it, and the joint compound rapidly turns to powder without tape to back it up. The same can happen if there is too much or too little compound or the compound is the wrong type, you can also see this problem.

This is akin to the reason that drywall is gypsum between two sheets of paper... All you have to do to break or cut the gypsum is to disturb the paper.

The best practice I've seen/used is to use Durabond to bed the tape, and then normal green stuff over it to feather the joint.

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