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Building a Gable Roof
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" -The outside of our little gable dormer is the easy part to build. You see the angles of the roof and you understand why it's also known as the dog house dormer. From the inside, you can see how it's been framed to receive a window right in this opening, that's the header and here are the jacks on the sides. And then if you look at the roof line it's a 9'12 pitch which means that for every 12 inches that we're traveling horizontally from way outside towards the center, we're going up 9 inches. That's the easy part. The hard part is figuring out how to roof all of this cause on the parts [unk] dormer, you see how the roof rafter simply travel from the doubled up plate at the side wall up to the ridge on high. And this empty space in between is what Riley's gonna help us understand."
" -Alright. What were going to do, the first thing we're gonna do is get a header [unk] across this span here,"
" -Yes."
" -To receive the rack that's coming down from the ridge and what we wanna do is establish the ceiling height and that tells us where we wanna place the header."
" -Okay. And the header of course is always the constructural member that is heading off the weight something, either a, a roof load or in this case, these rafters. And he's already got it made up here and what you see is two 2 by 10's that have been stiffened up for the piece a half inch plywood that runs the whole length. And then we got 2 temporary pieces of 2x4 nailed on to help us hold it up in place there. I'll give you this end------"
" -Okay. I take the other end up."
" -Let's check it and nail it in place."
" -Okay. It looks good."
" -Got it?"
" -Okay."
" -Toe nail it right in."
" -Yes."
" -Notice how the whole thing shakes a little bit. That's what the plywood will take care of once we have all the sheeting in place. Okay. The next step in involves building the side walls of the dormer which we call the cheap walls. And Riley, why are you starting with this piece, the bottom plate?"
" -Well, this is gonna give us a nice clean look when we go into the header. We could put the top plate in first but we'll be looking at these broad ends and this is a, -----"
" -It's a lot near."
" -Yes. Even though it's a rough frame you want it to look nice and neat."
" -Good. Now, the pieces that are the actual vertical studs here------"
" -Yes."
" -also involve an angle, how do you get that?"
" -Well, it's gonna take a scrap Bob and put it where it's laid out and I used the framing square to transfer this angle on to the stud."
" -Alright. Now what?"
" -Now take it and we know that by looking at it, its roughly around 30 degrees, so I'm just going of about an inch top of that mark, cut it 30 degrees."
" -You could use a [unk] square?"
" -You could use a [unk] square but a lot of people don't have them which I don't [unk] in my pocket right now. And I'd say that's some it 32 degrees of [unk] and it actually looks like 33. And now, we'll cut the 4, 5 area swing."
" -I know I have 4 alright, so I'll just cut them all."
" -Okay, with all the plywood in place on the main roof, we're ready to put our little ridge for the dormer itself."
" -There you go."
" -Okay that's great."
" -That. And these [unk] spaced 16 inches on center. Okay. So how do we cut the rafters that fill in this area?"
" -Well, what we're gonna do Bob, is establish where this valley is gonna be. We're gonna do that by getting the plane of these rafters locked under the plywood and we'll snap a line from the ridge down to there. Okay. Well, this is our valley. Now we'll carry our layout's at 16 inches on center------"
" -And cut our jack rafters"
" -And we'll cut, we'll measure down and cut our jack rafters."
" -Alright. Now this is probably the most complicated stick in the whole little dormer frame------"
" -It is."
" -how did you get this angle up here?"
" -Well the top is a 9/12 pitch which is [unk]pitch."
" -Vertically."
" -Right."
" -And down here at the valley, we've cut the 9/12 horizontal link."
" -Exactly."
" -And then we've cut it into the roof at a 33 degree angle."
" -And that relates to cheap wall."
" -That's right."
" -Great. So it's all set to go?"
" -All set."
" -Just hook it right in there."
" -Am I on there, yes."
" -Okay and this one is the same exact angle?"
" -Yes."
" -With just shorter distance and that's just about completes the framing for this side."