How To Install a Vent in Shingles



hi I'm Shannon from host improvements comm and in today's video I just want to show you how to install a roof vent into your existing shingled roof so this could apply really whether your reroofing at the time or whether you're adding extra ventilation to your attic we're going to go right from the start of cutting through the roof decking and installing the vent and finishing the shingles around it so kind of start to finish this will go along with all the other roofing videos that we have we've got a few quite a few on our youtube channel so you can check out any other ones that you want to see there so first thing I should maybe touch on is figuring out how many of these vents do I need actually need for my roof so basic rule of thumb is to take your square footage of your house so the actual floor space and for every 300 square feet of floor space you want one square foot of ventilated area okay so out of that every one foot you want to you want to split that kind of evenly between soffit vents where air can be drawn in down through your vented soffit and then the other half with the vents up here at the ridge that we're doing okay when you buy your Ridge or your vents they should say right on them how many square inches or square centimeters of Frese airspace they you know they are rated for so that'll help you figure out you know what you need exactly for vent space and stuff so you know that's just a rough idea on how to do it some regions might be a little bit different but here where we are that's the basic rule of thumb roof slopes sometimes comes a little bit into play as well but this will get you close to where you need to be so we've got like I said an existing re-roof that we're doing we're going to cut this van't in but we'll just start by showing you basically how to figure out the position of it first of all so if you've got either existed existing shingled roof or you've just reroute you you want to pick a space close to the ridge you know say within a foot of the ridge but but you want to have it so that if you look at this vent just beside us that we've already done you can see how we've worked it out so this course of shingles is underneath the bottom lip and this comes out exposed and then everything above there will overlap on to there so you want to get your your vent conovan if you can in roughly in a good spot for that to happen so this is the last vent on this roof that we're doing we've kind of got it all figured out to have them all lined up so uh yours yours is going to be different from mine so there's no point giving you any kind of measurements really I'm going to line it up to the pencil marks that we remarked we originally marked on here you can see that we've got course the shingles going through and we've got it worked out so this strip here will be exposed and everything from here above will be covered up or lapped onto the van okay the only thing we're missing is we've got to cut the hole down below so we're just going to use a circular saw we basically know from the size of this here that's the size you want don't get it super you know a lot bigger than that basically want to just be that size don't get it smaller so we've we've kind of got that marked out on here just get a bit of a rough idea down to there so that's what I want to cut out I'm just going to set that to the side I'm going to use my circular saw and I will be cutting through the shingles so don't use your best blade for this particular little job okay so we've cut through them both here this is a plank roof so here's maybe plywood might not be quite through this one actually I'm kind of on a rafter here so I'm going to move my one cut over just a little bit just like soul get rid of that one piece drop down in there I'm going to have to go up in the attic and get that one after okay so we've got lots of sawdust I'm just going to blow that off just kind of get it out of our way we don't need the saw anymore this is our piece of shingle that came out we don't need that okay well there's our paper okay so now we're basically ready for the vent we're going to put a bead at our just around the edge of the opening here just to seal the perimeter of the vent just like so hopefully that doesn't leak out everywhere while we're talking I'm going to just line my vent back up with the marks ahead like so I'm going to hand nail it just so I don't break the vent put one in the middle I'll just measure so we've got an equal equal reveal there many times the vents might have pre-punched holes the nail through this one really just had one but okay so got that all nailed on I'm just going to get a couple of these things out of the way okay so we've got the vent there now the next step is we want to continue on the next course of shingles and we pre-cut some here match them a little bit off I'm going to trim that up just going to shorten that one up a little bit okay so again I need a little bit of tar roofing cement whatever you're using and we're just going to run a bead right along here and out on to the other shingle beside it that carefully laid-out went into position get it lined up where we wanted it okay so we've got that so we've got the tar there so if anything moisture gets under there it can't get back underneath the shingle this side here you can do the same thing probably can't really see what I'm doing but I'm just doing the exact same thing and this one pre-cut here in the back underneath here just like that okay now our next one and I mean your cuts might be slightly different obviously just depending on the positioning of the shingles and the vent on your roof so now we need continue on this roll and you can see it doesn't quite get to the vent here yet so this will be a full shingle with no cuts in my case like that and then my next one is going to span right over top of that so I need a full shingle which is this here and I can just lay it up on top slide it over and but it to this one where I know it's supposed to be and we've got to cut a little bit of a notch up and out of here right so I can take my knife and just put a notch in it basically as my cut mark as a reference like so now I can measure from where it's sitting now to where it's supposed to be which is six inches so that means I need to cut up into here at least six inches and I'm going to go about another half inch more just to give myself a little bit of space up and over the vent quarter inch half inch anything in there would be fine so actually I'll go six and a quarter just putting a you notice we're using laminated shingles in this demonstration so I'm cutting on the backside just because they cut a little bit better that way where's my there just make these two vertical cuts let's cut here that little piece that should fit just nicely around our vent we'll just double check it before we do any sealing should just slide rate my hitting on oh they're just should just sit just nicely around there just like that but I want to put a betta tar in there again so just move that out of the way and we're just going to simply go down to the shingle tar strip up nice generous bead across here and back down this side so now we can slide our shingle back on in there again boat smearing it through that tart we get close to rule on B okay and then in this particular case when our next rule comes along it's just going to come right across the top of the vents and finish that off so it'll uh we don't have the ro broad all the way along but it'll this one ends up just just nicely finishing right off top across the top of that there so so that's really the basics of it Oh something else I should mention any of these exposed nails once I'm all done the the entire roof if I'm doing a whole roof or whatever I'll come back and and cover any of these exposed nails with a just a dab of the roofing cement or tar that I'm using well the size of a quarter just flatten them out a little bit just to seal them up the only reason I do it after the fact is so that you know you aren't stepping in it as you're doing the roof dragging your hose through it or anything like that making a mess so just kind of the last thing I do I pull the all the tools off and then I go back and cover all those nails up so so hopefully this gives you a little more detail on how to install a roof vent and helps you along the way if you have any questions about your project you can post them up on our forum or even go up there and let us know how your project turned out and if what you watched here on our channel was helpful or not so you can do that you can follow us on Facebook Twitter patreon all different types of social media like that you can follow along with us and see what we're up to thanks a lot for watching

23 Comments

  • Jose Duran

    April 14, 2019

    Fuck the rafter he says

    Reply
  • Larry M.

    April 14, 2019

    Thank you for making this video. Our garage had NO roof vents The garage was a bake oven in the summer. Caused nails to lift and push up the roof shingles. These vents made a world of difference. I used screws instead of nails. Used black roof cement all the way around.

    Reply
  • Daniel

    April 14, 2019

    Great job i need to install a vent in shingles I appreciate your video and you can not please every one there is always at least one Jackass!!!! Out there always will be! Thanks for the video

    Reply
  • James Walker

    April 14, 2019

    A mature.. says rite on vent USE NO TAR

    Reply
  • WB Games

    April 14, 2019

    Dude I loved how you used a square and a little piece of plywood to cut on it makes nice looking work it’s how our younger guys need to do it until they get better at making straighter freehanded cuts without also cutting through the finished roof 😉

    Reply
  • Mikey Rosario

    April 14, 2019

    Why is there a seam close to the vent?

    Reply
  • Sergio Lopez

    April 14, 2019

    Good job

    Reply
  • Sergio Lopez

    April 14, 2019

    Goog job

    Reply
  • Marzena Baginska

    April 14, 2019

    Plastic vents should be NOT use on the roof because they don't last long and the homeowner end up with big leaking problems later on. You should never leave open nails because it going to leak later and do a lot of damage inside the house. I am so upset watching this because he is obviously not doing good job and that's going to cost a lot of money later on the homeowner to repair all the damage form water getting inside every time it rain.

    Reply
  • moon solice

    April 14, 2019

    I would be fired if i took so long to install a vent..

    Reply
  • slate roofing

    April 14, 2019

    only leak when its raining

    Reply
  • tbroofer

    April 14, 2019

    This guy cracks me up… most what he does should be labeled “ what not to do “

    Reply
  • Dan and Liz Kaplan

    April 14, 2019

    Very clearly explained. Thanks for your help (and confidence) to do this for the first time.

    Reply
  • Robert Smeagles

    April 14, 2019

    Nice work. I feel like I could go out and do this without too much problem. I just need to decide about the bottom of the vent for my area as far as seal & nails with respect to rain and wind.

    Reply
  • Virgil

    April 14, 2019

    So as usual when it comes to the Internet, peoples answers are this was right and this was wrong.  I found this video doing a search.  I have these types of vents installed on my house already.  I was in my attic and I can see light coming in from underneath the louver edges on the bottom. The edges are nailed where they are marked to be and the nail heads have tar on them. On here it shows him as sealing it before hand, while others say, no you need that not sealed so water can go down if it ever gets in there.  My worry is if we have a driving rain would water get underneath that bottom lip?   The house is 21 years old and there is no water damage  on the roof underneath, the insulation is dry, etc.  I see no water issues inside.  But Id rather be right as well and not worry about it.  So what is right, seal the bottom edge underneath, or not?

    Reply
  • hingsberg

    April 14, 2019

    "I'm kind of on a rafter".. . .lol. nice one buddy. :p. :p

    Reply
  • jonmo111

    April 14, 2019

    snowventco roof vents stops all snow and rain, it is a new invention

    Reply
  • Boutique Nail Lounge

    April 14, 2019

    Very skillful

    Reply
  • Raúl 1978 Cabrera

    April 14, 2019

    bad instructor because I look at the nails in the joints of the roofs and you can never leave the nails in the joints because the water is filtered

    Reply
  • JoeCity

    April 14, 2019

    just installed a new roof and roof vent on my 16' shed… i forgot to put a bead of caulk around the attic vent… guess ill have to try to add it tomorrow…. thanks for all of the videos

    Reply
  • scoobtoober29

    April 14, 2019

    What do you preffer. The tar looking adhesive or the silicone looking stuff.
    I'm not sure.

    Does the tube have to say flashing adhesive? Or roofing adhesive?

    Reply
  • Ali c Near my

    April 14, 2019

    ???

    Reply
  • Anon Ymous

    April 14, 2019

    What a dumbass

    Reply

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