By Mark J. Donovan
Over the years I have completed a number of drywall installation projects. In the process I have used paper tape and mesh tape for taping and mudding the drywall.
Paper tape works best on inside corners as it has a pre-formed seam running down the center of it that makes it easy to fold and to apply to inside corners. All you need to do is apply a skim coat of joint compound, prior to applying the tape to the inside corner. Just make sure you apply at least 1/8th inch of joint compound into the seam before applying the tape. Also, when using your trowel, do not press the tape too hard into the joint compound such that you squeeze out all of the material from underneath the tape. If you do, you will wind up with drywall tape that blisters or peals away from the wall.
As with the inside corners, when applying paper tape to flat seams, you first need to apply a skim coat of joint compound to the seams. Once you have applied the skim coat onto a flat seam, use your trowel to work the paper tape into the joint compound. Make sure the paper tape is centered on the seam so that there is equal overlap on both sides of the seam. Hold your trowel at a 45 degree angle and lightly press the tape into the joint compound. Again, you do not want to apply too much pressure, such that you squeeze out all of the joint compound from underneath the tape. If you do, the tape will blister and peal.
Mesh tape works best on flat seams. It is easy to apply, as it can be directly attached to the drywall without first applying a skim coat of joint compound. The only other negative with applying mesh tape to drywall is that your trowel edge can catch on it and instantaneously pull the tape off the wall.
My recommendation is to use mesh tape on the flat seams and paper tape on the inside corners.
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