Apply joint tape to drywall after filling all cracks with joint compound. Apply drywall joint tape with tips from a heating, ventilation and air conditioning (HVAC) certified technician in this free video on home repair.
Hi, I'm James with JNC Home Repair. Today I'm going to tell you how to apply joint tape to to a drywall seam. What we've got today is we've got a standard, we just installed a couple of pieces of drywall and we're going to show you what a drywall seam looks like before it's been taped and floated. And, the first step in the taping and floating is applying joint compound. What you want to do is you want to apply a thin coat of joint compound to your seam and then you're going to apply the tape. Now, taping and floating is like a three step process. It takes, if you're using twenty minute quick set, you can get away with it and maybe do two or three steps maybe in one day. But if you're using just regular joint compound, the premix kind in the jug, it's going to take you a couple of days because you've got to allow this stuff time to dry before you sand it because you have to sand it in between coats. And, the first coat and what we're going to explain to you right now is just how to apply the joint tape. Basically, what you're going to need is you're going to need a mud pan, you're going to need a six inch taping knife. This is a six inch taping knife, this is a good place to start, you want to get at least six inches of mud on your seam on the first run. OKay? You need to do this at least three times to get your joint completely filled, OKay? And, the first process is, once you've got your drywall installed and you've got your seam there, it's just going to look like a big old gap. What you're going to do is you're actually going to take some of your joint compound, put it on your taping knife, and you're actually going to work it down into the joint and go ahead and fill that joint all the way down. You want to get at least six inches of mud on your seam on the first run. And then you're going to come back and you're going to apply your joint tape right on top of it. And then you're going to take your taping knife and after you've done that, you're going to run your taping knife across your tape and you're going to work out any kind of air bubbles, any kind of imperfections that are in there. You want it to be nice and smooth and after you've done that, it's going to dry exactly like that, so you wanted to get it real low and it's real smooth as possible. You don't want to have a whole bunch of joint compound that you're going to have to sand off later. Because when you look at a wall, you'll notice that all walls that normally they look all real nice and smooth. But, if your joints are not taped properly and they're not filled properly, you're going to see a bunch of humps every four feet or so on your walls. To eliminate that is to do this properly.