Tying an Addition Roof to an Existing House | MY DIY

welcome back to the channel today i got something a little new in store for you guys it's a collaboration it's a collaboration with me in the shop and me on the job site we're gonna put in some valley rafters today so let's check this out all right so first thing you want to do when you're doing your valley rafters is to pull your measurements for your layout on your valley board and what you want to do is you need to pull off of a rafter that is on layout because the one up against the house here is not in layout so you have to pull from one back and you mark all your long points on the valley board you also make sure that your ridge is laid out properly you can see this is a 16 on center so everything's laid out on the ridge and everything's laid on the valley board show you here what you you when you pull and you mark your long point now there's a lot of intricacies with uh angles and whatnot we'll kind of get into that but when you pull often you just run and lay out every 16 inches your tape measures should be marked for it as you can see in here i think we got one or two more here we'll show you those are all long points of the valley boards now what i like to do on the long measurements is i use a board and what i do is i put it right at the end and then i mark it at the ridge that way i can pull the measurements off that because your tape measure doesn't want to stretch out so once you get your long measurements and this was actually pretty small so i've done some pretty long ones once you get your long measurements and you just use your tape measure get your short measurements and i'll show you how you take the board and then you pull it and mark it and then all you have to do is take your measurements see i got my number one measurement my number two measurement got my number three measurement there and then you just transfer them write them all down and use a piece of scrap and mark them somehow i marked this one north and south you can kind of tell there market is the neighbor side and the yard side but you have to know which side is which because you have to have your angles right now this cathedral ceiling that i had built is a six pitch so i'm marking all my ridge cuts for one side this is actually the far side that you're not going to see the installation of on this video i mark all my six pitches for the ridge cuts and i make those cuts you can see right there just use a a speed square there's a 612. i'll show you that's that's all you need to do in mark 612 then you pull from the long point all these measurements are long point you pull from the long point and then you mark your measurement which is another long point so it's along the top of the board everything is on the top of the board because that's your long points there then you use a framing square mark what the horizontal cut what i call the back side of a 612. you can see there there's a 24 12 which is the same as a 6 12 24 12 6 12 if you double it then it's the same thing that's how i mark it and then you figure out your bevel the bevel the house we're sitting on is a four pitch so it's about 18 degrees everything you're dealing with and your ridge cut and your back cut is on the pitch that you're you're using on yours but your bevel is what you're landing on so i set my saw to 18 degrees it's good to have two saws that's why i i cut everything with the cordless saw square and then i use the corded saw for the bevel cuts and i like to cut to my right that's how you cut your long points it's you can see here i kind of just stacked the rafters because i've cantilevered them so bad i just didn't want it to tip over so you make all those cuts now you see there's this is actually the leftover cut here when you cut all of one side that leaves you the cuts for the other side now you're gonna pull from the long point of that beveled cut and you're gonna mark your six at the other end for your ridge cut this is actually this will be the side you're seeing installed the first cuts i made were the side that is not installed in this video and uh if you have long enough stock when you cut your first long rafter it leaves you your short rafter so you just invert them and you can pull all those off of the long points and go ahead and make your cuts for the ridge that's why you use two saws because you don't want to have to change the bevel constantly all right now once you've hustled them all up onto the roof and hopefully don't slide off when you pile them up there what i like to do is i take a nail and i tack it into the valley board just to hold the long ones because if you try to set it on there a lot of times it'll just slide down so you just tack a nail in there and it'll rest up against the nail you put it just below where the layout is start with the longest one and begin installing them at the ridge so there's my long one and we grab that be sure to change your hat too because it got cold for some reason it's bad weather back nail through the ridge and now we can get ready to nail into the valley board here so you set them on the nail that's nailed into the valley board back nail them up top and use your hammer to drive it in where the compressor won't set them because i had a bad i had a bad regular rig had a bad regulator on there nail the top toenail the bottom in and just keep running them all out just like regular rafters they're all 16 on center it's just an extension of the layout from the gable wall it's not that hard the biggest problem you will have is making sure you got your angles right and you're making sure you're cutting each side because an angle cut for one side on that bevel what's left over is the other side because they are two different measurements you can kind of see if you grasp it if you're here watching this video i'm assuming you can grasp the difference in the bevels oh let's see so here my valley board is a two by four and then i had to add a two by ten to catch the heel of the valley rafters because the heel is where all the weight comes down at and i'll kind of show you how to get the valley board in in a minute here because where i'm at you can't just sit on the roof you used to be able to make it made life a little easier but you can't just sit on the uh roof decking so you got to put a valley board in and you have to catch the heel of the the uh valley rafters you can see how it comes to a point right at the end there that's how you keep it all in plane and here you go this is the finished product of both sides installed here all right i'll bring you in a little closer and i'll show you how to get the valley board in kind of a rough mock up here on the the workbench okay so right here because we're on a level plane i've got to kind of mock it up but if you were to plane across you take a four foot level six foot level if it's a big job you use a straight if you can find one two by four and float it across so this would be my rafters on the comment section of the addition we plane it through so we're hitting here we're hitting here and this would be where it would hit the roof but we can't go that far because we have to sit on a valley board so what you do is you slide your valley board in until it hits that's where you want to be what i like to do is cut the top to a very point which you can see in the video and then just butt that into the ridge because that's in plain because from the ridge down everything's in the same plane so all you got to do is plane across see where it hits the existing roof and there you go you just slide your valley board in which would be at an angle there's your valley board but you got to make sure that you catch the heel of it because that's where the weight is bearing not the point the heel of the 2x6 2x8 whatever you're using so there's your crash course on how to cut and install some valley rafters if you got any questions drop them below in the comments while you're here hit the thumbs up and if you want to see some other rafter videos i have a few right here and you should go check those out

Channel: My DIY Adventures

Views: 401,524

Keywords: DIY, homesteading, handyman, construction, Do it yourself, carpenter, room additions to house, room addition framing, room additions to back of house, rafter layout, valley rafters

Id: gA_b9CZ-XJg

Length: 9min 18sec (558 seconds)

Published: Sun Dec 05 2021