What is the purpose of the line down the middle of drywall tape?

Answer 1

More important it is the folding seam for angles, good luck

Answer 2

The line is so you can center the tape on the seam on the drywall and to fold at a 90 degree angle for corners.

Answer 3

You don't want to sand down tape lines, you want to apply dope/drywall compound over a vast area and then have it thinned out, effectively covering the tape and creating a smooth area. It sounds like someone either didn't apply enough dope or, more than likely, it was over-sanded at some point. Sanding and then priming is only going to cause two-inch long uneven areas/humps where the 2" (I assume) drywall tape runs over the seams. Hope that helps, Columbus Concierge.

Answer 4

The line is so you can center the tape on the seam. Thus affording the proper covering of the seam. It also helps when you are sealing a corner..

Answer 5

After installing thousands of sq. ft. of drywall, and thousands of gallons of mud, I suggest all answers here,,,so far,,, are valid.

I personally have stopped using paper drywall tape, now prefering the modestly adhesive, mesh tape.

Rev. Steven

Answer 6

I would think it was to help you center the tape over a seam.

Answer 7

the purpose off the line is a fold. so when your applying to a internal corner it doesnt seem to wave giving your internal a straight look. and to those who cant make the call off the center of two inches um hmmm. i hope this helped

Answer 8

to center the tape over the seem

Answer 9

So you can line things up properly.