Metal Roof- Best Practice Details

on the build show today we're talking metal roofing we're at my house under construction and i've got a really cool black roof about to go on my house we're going to talk through the entire process guys start to finish we're going to go from roof deck to final install we're going to talk about the machine that makes it the metal we're going to jump into the cost and i'm going to give you a few of the nerdy details to really get a bomber install today's video is sponsored by sheffield metals let's get going [Music] all right guys so metal roofing it all starts right here at this machine now this could happen back in the shop but we like to actually run the panels on the site this is a new tech machine and what's happening is that metal coil that's actually a sheffield metals coil that already is painted with the keller is making this profile right here you can see this is what the panel looks like when it comes out and this is going to get clipped down to the deck the other panel is going to go on top and then you're going to see later that this is going to get mechanically seamed in what they call a double lock profile by a robot now what i'm doing is i'm making it this will be a 24 gauge roof and this metal that comes out the roof has already taken measurements at the roof so when these panels come out the machine's actually cutting them to the panel length and then we're going to stock them in the driveway now let's actually go up on the roof and let's start at the roof deck and i'm going to talk to you about the process before the roofer arrived okay so let's talk about a couple critical details before the roof panels themselves get laid first off you got to think about underlayment now you can use a lot of different underlayments underneath the metal roof but one of my personal favorites is the sharkskin ultra sa this is a very thick synthetic material that's a full peel and stick a full ice and water shield we like that for durability reasons you know i'm in texas so i'm not super worried about ice damming but it does happen but if you're in the north you definitely want to think about ice damming you definitely want to peel and stick at least the first three or four feet at your eaves and you also want that up your valleys for extra protection underneath your metal roof now i've gotten the extra step and done that everywhere in my house i want that extra bomber uh underlayment if i got a leak back here at the head wall that comes in i want to make sure that it's going to run down harmlessly the other benefit of a full peeling stick is that i have just less fasteners in this roof now we will have some fasteners later but if i can reduce the amount of fasteners overall that's a good thing this underlayment in particular is nice because it's got a really thick adhesive and acrylic adhesive plus the membrane itself is pretty thick so it's going to do a pretty good job of kind of self-gasketing around those penetrations later next let's talk airflow underneath the roof so before we put our drip edge down which is that very first piece of metal that they're going to bend one detail that i really like this isn't a necessity but i think it's really best practice is the thing about getting some airflow underneath your metal roof here's the drip edge right here which is really the first piece the roofer is going to put down and he's going to bend this out of the same metal as the roof and this drip edge what it's doing is when the roof comes down it's going to allow that water to drip out and come ahead of my fascia which is right here and then if you attach a gutter which i highly recommend gutters it's gonna allow that that water dripping down to pop into the gutter and not run down your fascia now on this drip edge see how it's kind of off my fascia that's because i've put this strip on right here this is by core event and this is a corrugated plastic kind of cardboard material it's about half inch or so thick and if you look at it you can actually see daylight through there what's happening is this gets put onto the fascia first and then the roofer is putting this drip edge on now the reason being is i want to space my roof off the deck by just a little bit so i can get some airflow some drainage and some drying underneath that metal there's a bunch of different options on my low pitch roofs right here i'm just a 312 it's a nice gentle pitch uh i'm i'm going to use one of these two options this is by keane and this is called their viper vent cdr this is uh i think .30 so it's about a third of an inch thick it's a 3d mesh material that won't compress underneath the metal so that if any condensation happens underneath the metal if we were to have a leak that happened around a flashing there's a gap there's an air gap underneath that metal so that we can get drainage and we can get air flow in there to dry it all out this is a best practice another option would be sharkskin's dimple map now this is going to be a little bit more rigid than this other one it's definitely not going to compress that's another good option but on my high pitch portion of my roof right behind me here i've got an 812 pitch and with that 812 pitch those choices can be a little sketchy to walk on without a bunch of toe boards so i opted for a method that i've used a bunch which is a 1x4 on a diagonal on this roof up here i've done the 1x4 on a 45 degree angle that's a great detail because now i've got a really easily walkable surface i'm not as worried about toe boards as long as you're tied off it's a fairly easy roof to walk on for the guys during that roofing process but it's also giving me extra elevation those one by fours are three quarters of an inch thick so i've got a really good drainage and drying space i also have lots of meat to screw into right i don't have to worry about screw length because those standard screws from the metal roof are going to screw right in there when i get there and i have one last product that i'd recommend if you're in the south and that's a radiant barrier now the guys at sharks can make this material it's a flexible kind of aluminum feeling material and you got to be careful about placement though you need the silver reflective side facing towards the air gap so you actually see on this roof here where i had my one by fours and where i'm doing this drainage mat i've put the silver side down the silver the aluminum whatever that product is that's really highly reflective needs to face the air gap and then when the sun's radiant rays hit that because of that air gap it's going to reject that heat and we're going to make my house much much cooler that's a best practice absolutely for the south you may not need that if you're in a northern climate okay now let's talk about the roof itself and the process of installing these panels so we saw the new tech machine making these panels and here's the two samples that ryan ran for me out of the machine and you can see that roll former is making two different profiles on this profile we've got kind of a candy cane shape here and then on this one we've got an l top what's happening is the roofers are going to put this panel down and they're going to put a clip over here that's going to get screwed to the deck now that screw spacing might vary a little bit if you're in a high wind zone if your building codes require you to have a wind rated roof you're going to be really cautious about that screw the type of screw how many screws per feet you're going to put in all that sort of thing and then the next panel when it goes on is going to come over top of that see how that works it's kind of cool and then eventually you're going to crimp that now there's a couple different ways to crimp i'll get that into that in a second but let's talk about that panel when it goes down you can notice when the panel goes down it's got a tongue that's a little bit long and they're going to fold that tongue in with a hand crimper and then there's also a little bit of a tab on both sides that's going to get folded in and the guys are going to use a hand crimper on the bottom and a hand crimper here now everything has good drainage we've got everything running positively with gravity so in this project they're using a mechanical seamer it's basically a robot that will do this crimping but you could of course hand crimp that as well and then you'll notice the ridge cap is not on yet on this roof eventually we'll have a ridge cap that will go on there and that ridge cap is also going to be vented we want a little bit of airflow right here at this fascia and a little a bit of air flow at that ridge cap all right guys that's basically the process let's go downstairs and i've got the sheffield metal guys here i want to talk about the type of metal we're using how it's finished what to expect on the paint finish all those kinds of things i'll see you downstairs all right guys special treat for you i've got adam mozilla adam's actually the owner of sheffield metals adam thanks for coming out appreciate you having us today always love having a family-owned company because i feel like you guys are going to make better decisions than some of the corporate giants but adam i wanted to have you out as an expert to talk to these guys about what's the difference between metals gauge thickness finishes will this roof need to be repainted some of the someday can you answer some of those questions for us absolutely first thanks for having us again um just jumping into it you know we like to think that you're kind of going with the cadillac of the system so we look at metal roofing as good better and best you know we we really like all metal roofing um you know but when you look at it you've got 26 29 gauge thicknesses that are usually a little bit thinner okay define that real quick what's the thicker gauge between those two so the thickest gauge out of those three 24 gauge is going to be the thickest it's kind of counter-intuitive stepping down a little bit thinner is 26 gauge and then stepping down even further as that 29 gauge mix that's got it so the lower number is thicker so the lower number is thicker and you know you see predominantly in standing seam roof applications you're going to see 24 gauge you might see some 26 gauge if you're really going bulletproof traditionally on like a higher end commercial type application schools you might even see 22 gauge oh that's thick yeah but hard to worry about yeah it can be you gotta you know have some strong forearms to to cut that metal and then work with that so sure yeah all right then talk to me then so we're doing 24 here which is really what i view i've no actually that's not true i've done 122 but it was a ribbed roof not a um not a snap lock or in this case a double lock talk to me about uh paint finish on this 24 gauge roof that came the metal came from you guys yeah so we're doing predominantly pvdf finishes um so when you talk about the best that's really the the top of the line painted finish you'll see on a metal roof you'll see some siliconized polyesters that's kind of you know better and then the the lower end would be a polyester type system so so pdvf if i can interrupt your rope crack a lot of builders kind of commonly refer to that like kleenex as a kynar finish yes but that's an actual brand name and that's not what's on here this is a sherwin-williams pvdf which is the same technology but you have to be careful about that brand name because that's not um that is like a kleenex brand exactly got it exactly so so yeah this is going to be a sherwin-williams pvdf and it is the the higher end thing the higher end paints are going to last longer have better fade characteristics than the other two systems the smps and the polys that i mentioned earlier so if this roof is going to go for 50 years most of the time it's changed because people are you know wanting to change the color that sort of thing not because the roof is actually failing right exactly exactly so the paint's going to last much longer than than that 30 40 years that's what you're anticipating but that's just what the warranty is for and how does that paint actually go on is that rolled in your shop you know what how do this doesn't look like uh it's a cheap paint job no no so this is it's actually a roll coated process so it's at a high-end industrial process and it's actually a baked on finish so it goes through some rollers and it it rolls the paint on um and then it goes through an oven and actually bakes the finish on so it's traditionally getting a primer coat baked on then that pvdf coat baked on and then it's spooled out into usable lengths for us you know 10 12 000 pound coils for us we bring it into sheffield metals location and then we process that coil down to usable lengths and widths for our customers for standing seam applications for uh trim applications on flat roofs or even trim applications on residential type roofing gotcha yeah now adam we talked earlier or i talked when i was up on the roof about some of the best practices about under what's happening underneath your metals what are some best practices people can think of or keep in mind uh when they're planting their metal roof so you know a lot of it comes down to panel selection so you know you showed that lower slope area on area on your roof that 212. you know we do not recommend a snap lock on on the low solop application so the fact that you're you're well you're mechanically locked mechanically seam panels on across the board but particularly on those low slope areas you want to make sure that you've got the right panel right selection so on so forth because the higher pitch has gravity working to shoot that water off but when you lower that pitch down you want to make sure that water is not getting in that seam right yeah it's going to be holding more water as it's shedding you know so you have hydrokinetic and hydrostatic systems so you have a hydro static system so meaning that you know on that lower slope area that's going to hold more water let's say you get a driving rain it's going to hold more water than your steeper slope area so keep that in mind as you're you know thinking of what you want you know what you want you might want a snap lock system but it might not be the best system even though you know depending on what your roof geometry and roof planes look like yeah that makes sense now another thing that i was real special or specific on with my plumbers was i really wanted to reduce my penetrations yeah i do have two skylights in the back which penetrated and my roofer is making me a custom flashing and i also like to stay away from deck mount i like curb mount skylights it gives me a deeper flashing but one thing you'll notice adam as you look at the front of the house you don't see any roof penetrations in front i only have one roof penetration for events on the back side on the second story and that's and that's a beautiful thing that's another great design consideration so if you are having the opportunity to design something kind of from the ground up whatever you can do to to minimize penetrations that's going to be a big plus uh you know what you're talking about with the skylights doing curbs is is much better than just you know trying to flash around that's going to be a much longer much longer term solution for shedding water keeping water out things like that for sure the last thing i want to ask you about adam is uh i'm thinking about doing solar here talk to me about attachment on solar for metal versus some other roof systems yeah so probably the best solution for solar is to go with a clamped on system so you know the idea of a standing seam roof is you don't want to put penetrations in there you know you're trying to offset as many penetrations as you can so we've got a great partner in s5 they're a roof attachment system uh they've got it's basically a clamp that goes onto the ridge is that right exactly so you're not screwing down you're just kind of compressing onto the uh onto that onto that seam yeah so the seam is taking it you're not creating a penetration and it's an engineered system so you know it's going to last so they say hey tighten it to this put it this at this spacing and you're good to go and they've got they've got uh snow retention systems solar systems you know let's say you wanted to put a satellite dish on your house you know you can have you know directv guy come out you can attach that to the seam you do not have to penetrate that seam to get that dish on that roof that's awesome man yeah i'm excited about that i'm facing kind of south and west on my house so i'm thinking that i might add a solar array right here above my master bedroom and with that black metal and that crimp clamp that thing on and i think the black and the black solar will also kind of blend in it won't be quite as noticeable oh that's cool adam really appreciate you taking the time to come out guys if you're interested in learning more about sheffield the manufacturer of this metal roof they've got a great website set up just for build show it's sheffieldmetals.com backslash build show go check these guys out over there and when you're talking to your roofer consider sheffield they're the coil manufacturer they're shipping that to your roofer and then with that new tech machine they make it right here on the site or make it back there in the shop and you can see man it's making a bomber roof i'm gonna go probably the end of my lifetime without having to mess with this roof and i'm excited about that big thanks for sponsoring today's video adam if you guys want more information on the link for these guys in the description if you're not currently a subscriber hit that subscribe button below we've got new content here every tuesday and every friday follow me on twitter instagram otherwise we'll see you next time on the build show you

Channel: Matt Risinger

Views: 140,668

Rating: 4.9453731 out of 5

Keywords: Matt Risinger, Build Show Network, The Build Show, Build

Id: qhq-oQJ9ms0

Length: 16min 53sec (1013 seconds)

Published: Fri Apr 16 2021