The truth is, it has its place, but – please! not on your drywall
seams.
Yes, my view of the is controversial. And I have my (good) reasons.
Really, those who use fiberglass tape in the place of paper tape for drywall tape are helping me earn an income.
As a finisher and a plaster repair consultant, I have made tens of thousands of dollars over time fixing drywall seams taped with fiberglass. Thanks, folks.
What goes on? Drywall seams desire a RIGID tape to keep closed. Specially over butt joints, the fiberglass recorded seam can wiggle ever so slightly a while later on after completing, and presto! a hairline crack develops down the midst of the joint.
The tape isn’t broken. It is exactly that the drywall dirt overcoat is not rigid enough – tough enough – to include the power essential to permanently secure the joint.
How do I know this? Well, for one thing, I’ve noticed that the long, recessed drywall seams tend to remain taped better. With these seams, the dirt overcoat is larger since it is filling the valley where the tapered ends of the drywall get together. Some extra toughness is got by you.
I understand the appeal of fiberglass tape. Slap it down on that crack and dirt ‘im up. Number bruises, etc. Very easy and comfortable, especially for the novice blend. And every do-it-yourself web site and journal article promotes it.
Yes, it’s tougher to learn to make use of paper tape properly. For the novice to drywall tape, there are problems of installing the mud on smoothly, cleaning the tape down precisely, preventing humps on the butt joints, and therefore on.
They’re learnable abilities, and big dividends are paid by them after the job is completed and decorated. Nothing is more annoying to the consumer or homeowner surviving in his new home/addition than to see cracks creating in his new walls or ceilings.
When I said in the beginning, there IS a location for fiberglass tape. To start with, it the record of preference for plasterboard joints under veneer plaster. This is what it had been developed for in the first place. It works perfectly in this location, because veneer plaster is much tougher and harder than drywall compound.
But, there is a location where fiberglass record can help in the drywall trade, and that’s in the repair end of the company. Around doors and windows, breaks in the drywall are common. These unsightly defects are got by a little extra movement in the framing there and you.
When I fix such cracks, I want some extra insurance. What I will do is use short items of fiberglass tape – perhaps three inches long or so – and place them in a bed of mud THROUGHOUT the crack and parallel to one another. I eliminate the excess dirt, in the same way I’d with paper tape.
When this first layer of tape is difficult, then I set down a type of paper tape right across the fiberglass and dedicated to the break. Now I’ve double insurance: the glass for lateral strength and the paper to help keep it tight to the outer lining. This often takes care of such cracks, or any cracks you are specially worried about. (Do not forget a couple of sugar coats.)
I do the exact same function or a variant of it on poor plaster chips.
One last point. I’ve stressed toughness of the substance you utilize. For that reason, I like “hot mud”, a setting type shared compound more like plaster for power. If you’re unsure of yourself and your rate, it’d be good to utilize hot mud with an extended setting time, like an hour or 90 minutes. Blend small batches and do not forget to clean your pans and resources well between batches.
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