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  • How to Install Endwall Trim

  • How to Install Endwall Trim

    To ensure you and your customers have the resources needed to get the job done, we’ve developed installation videos that show your customers how to seamlessly integrate endwall trim with our high-quality metal roof panels.

    Watch the short video or read the transcript below to familiarize yourself with the installation of endwall trim:

    End wall is whenever your panels are running up into a wall. Here's the direction water is flowing, and your ribs are running up into it. This could be brick or siding. In this case, it's new construction so this would normally be wrapped with Tyvek or something like that. Now, this shouldn't be confused with sidewall. Keep in mind you want to know what you're actually talking about when you order, because the trims are very different and we wouldn't want to get the wrong part to you. When we install this we're going to use Z trim again.

    Z Trim

    Z trim is a fantastically versatile trim. It's one of the more important trims that we're going to use on the SL-16 installation. It can be used to attach the final trim for end walls, side walls, gable trim, and hips, so it's used quite a bit. We're going to focus on the Z trim for just a moment. You'll notice that there is paint on one side and primer on the other. It's very important that when you're installing the Z trim that the paint always be on the visible side so that when you look up at the roof you have panel and a continuous finished paint visible to the naked eye. We use this Z trim between the ribs, attach it to the roof and then attach the final trim to the Z. We have the option of using pop rivets or stitch screws. For this particular detail, we're going to use stitch screws because we've already shown you the use of pop rivets on previous videos.

    Mark & Cut the Z Trim

    The Z trim is delivered to the job site in master lengths, and then you field cut it for installation between each panel. In some cases, for example on this first panel, we have a gabled trim that is sticking out into the panel. With this, you'll have to adjust the width or the length of the Z trim accordingly. I'm going to mark the Z trim, cut it and install it so that we can install the end wall trim using stitch screws. The cutting of the Z trim is straight forward. You can see my pencil marks where I've had it up on the roof, and I've made the measures to fit in between the panel and the gable trim. To cut it, I just snip through and it bends. Once I've made the bend, I cut up here. Now we have a finished Z trim which we're going to take over to our project and install between the panel rib and the gable trim.

    We've cut our Z trims, and before we install them, we need to know where to place them on the panel. In order to do that, we're going to use the end wall flashing as a guide. I'm going to take the end wall flashing, put it in place, and use a pencil or a sharpie to mark the tops of the ribs and the gable trim, just so I know where to put those Z's. The next thing to do before we install it is make sure that we apply tape sealant to the underside so that we have a water tight seal between the Z trim and the top of the panel. I'm going to place the Z trim so that the leading edge is just about a quarter or a half an inch behind the marks that I made. By placing it slightly behind the lines we make sure that it doesn't stick out from beyond the end wall flashing.

    Fasten the Z Trim

    Now that we have the Z trim in place, the next thing to do is fasten it to the roof deck. We can do that using either a pancake head fastener or a neoprene washer fastener, both are fine. Make sure that you thread the tape sealant with your fastener. Do one in the center and one on each side. You can see that we have the Z trim installed on each panel, and I want to point out a couple of important things. One is that you'll see holes where the Z trim joins each panel or the trim on the gable. We want to fill that using a urethane-based caulk that we would fill in the corners so that water can't get behind the Z trim. You'll use a standard caulking gun and a standard sealant. Make sure that it's a urethane-based sealant because silicones can eat away at the paint surface on the metal panel. Now that the Z trim is installed, we can install the end wall flashing. We're put it into place, but we're not going to fasten it down just yet. You can see that I've let it overhang the gable trim by approximately one inch on either side. and that's because I want to fold it down. I'm going to take my pencil and make a quick mark on each gable, then I’ll take it off and fold it down one inch before we install it.

    Apply Tape Sealant

    I've prepared the two ends of the end wall flashing and, in this particular case, they're overhanging a gable trim on either side. I've folded it down by one inch and that keeps water from rolling between the top of the gable trim and the end wall flashing. Before we install the end wall flashing, we have to apply tape sealant to the top of the Z trim so that there’s a water tight barrier between the end wall flashing and the top of the Z. The final thing to do is install the end wall trim.


    We have our Z trim installed and tape seal on top of the Z trim, so we can install this and put it up against the wall. You can see what a nice clean look it provides. We have a one inch bend down on either gable and we can fasten this using stitch screws. You can also use pop rivets. With the end wall flashing in place, I use stitch screws to attach it to the Z trim and to the gable trim. I'm going to install one between each panel, directly in the center. It’s very important to make sure that you grab the Z-channel that's below and make sure that you're in the outside leg of the Z-channel. This way, the fastener shank comes through on top of the panel and not behind the Z-channel. The shank of the fastener is visible. It's also important to try and blow away the metal shavings.

    There you have a Z trim and an end wall flashing that have been joined using a stitch screw. In this case, we've gone against new construction. Normally, this wall would have a house wrap on it like Tyvek. In an existing construction you might have siding, whether it be vinyl, wood or brick. All of them have slightly different installation methods and, in some cases, you might actually have to fasten the end wall to the brick or siding. The last thing to do on this particular detail where we have exposed fastener panel and exposed fastener on the trim is to put a couple of screws into the gable trims. This keeps them nice and tight so that the wind doesn't pull at them. I'm going to put a fastener into the gable trim just down here toward the eave. I'll do the same thing on the other side and then we're done.

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