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Metal Roofing And Snow Retention: Snow Guards, Snow Fence, Snow Rail


– Today on the Metal Roofing Channel we talk about metal roof
design and snow retention. (upbeat electronic music) – What’s up guys? Welcome to The Metal Roofing Channel, and welcome to another episode on our Standing Seam
Metal Roof Design Series. We got a great topic today
about snow retention, and make sure that you subscribe so you don’t miss any of these episodes. If you haven’t seen any
of the other episodes, make sure you check those out first before watching this one. So Lori I’m going to hand it off to you, and tell me a little bit about, when designing a metal roof, what should you consider
with snow retention? – Sure, well I think the
two biggest points are we’re starting with the
standing seam metal roof so we’re either designing
it to shed the snow or we can design it to retain the snow. (upbeat music) If we’re going to design
it to shed the snow, then you want to purposely place your people and pets
entrances at the gables. You want to design it so that the snow is not shedding over landscaping, mechanical equipment that
may be on the ground, gardens, anything tender
like that, sidewalks. If you are going to design it such that you don’t have that leeway, so now you are going to design it to purposely retain the snow then you have your choices. In snow retention you either
have a individual cleat, or you have a continuous
snow rail or snow fence. The biggest point we want to make here is because our standing seam metal roofs are fully engineered it would be most wise to also choose an engineered
snow retention system. So as you’re evaluating
those manufacturers be sure to look for that. As you’ll see in our literature, we are a distributor for the
S-5 style of snow retention. Theirs is an engineered system, and they’re a great
resource, a great help, they will help you design it, lay it out, provide estimates for that. (upbeat guitar music) Now let’s focus on the systems that are going to retain the snow, and the various styles again, I already mentioned the
individual or cleat style, and then the fence or the snow rail style. There are also glue on
snow guards, or snow pads. There are, your choices can
be metal versus plastic, but in the beginning of the process, you wanna reach out, always call us, we’ll give you our opinion
on the style best suited for our standing seams. But make sure that you’re talking to the roofing manufacturers so that you’re not voiding any warranties. Warranties on the systems
or warranties on the paint. While I’m talking about the paint let’s get right into the glue ons. You must remember that if you’re choosing an adhesive type of snow
guard, snow retention, that bond if only as good as the paint to the substrate of the roof is. So make sure you read as
much as you can on that, research that, talk to the provider of the glue on snow guard,
talk to the paint manufacturer, talk to your roofing manufacturer. – So, typically, a glue on, something that is glued right
into the center of the panel, your typical snow guard like that, that typically will void a paint warranty. Sometimes you’ll see
a lot of snow build up and then in the spring you’ll see a lot of snow guards on the ground then. Then you look up at the roof
and you take a look at roof and there’s voids in the paint, there’s paint that’s
chipped off, peeled off, or the glue failed and you’ll
see a spot on the roof or multiple dots on the roof where
it was attached to the roof and it was getting
different UV than the rest, so now you have a spotted roof. So that’s one of the things
that I think you wanna avoid. And also one of the big
purposes of a standing seam roof is a roof without penetrations. That’s one of the biggest
benefits is this great system that you don’t make Swiss cheese of. There’s a number of snow guard
systems that will actually penetrate the roof, the body,
the panel, things like that. You absolutely wanna avoid
that if possible, as well. Essentially you’re using this
to keep snow on the roof. And when UV hits that snow
or warmth hits that snow you get freeze-thaw,
freeze-thaw throughout, and essentially you have, if done correctly, either a piece of butyl or some sealant and a fastener, you’re counting on that to
not have any water intrusion in there, and it’s just a better bet to have a clamp on
system of non-penetrating snow retention system for your roof. (upbeat music) So, moving away from penetrating your roof or gluing a snow guard on
the roof, so avoid the glue, avoid penetrating the
roof if at all possible. We prefer a clamp on system, whether it’s a warranted
Sheffield Metals roof or an unwarranted. – And those clamp on guards won’t have a factor in
voiding the paint warranty, they won’t penetrate the roof. – So it really depends
on the manufacturer, so you want a manufacturer
that’s not going to crack and chip and peel the paint, there’s a number of systems
that have a set screw that will actually perforate the paint and potentially perforate the metal. That would essentially void the warranty. It’s not cutting the metal
but it is cutting the coating, that Galvalume coating
over that cold rolled and that is a potential failure point, rust issue failure point which could cause the metal to corrode, cause the paint to fail down the line so you really do wanna use a clamp system with a set screw that’s not going to degrade the metal coating. – Right, right. And to make sure that your, even though you have read the instructions from the snow guard manufacturer, but make sure that your
contractor’s aware, because they’re very specific on how to set the tightening
of those set screws so as to also not restrict
the movement of the roof. – And a lot of the snow
retention manufacturers are very specific on the
placement of a snow guard or where you’re gonna clamp it. And a lot of that has to do with, the force that will be exerted on that. So if you’ve got a eave
edge that hangs off over the roof system, over the structure, and you put the snow
retention system right there you’re putting all that
weight on the eave line and where it should be really in line with the bearing point of the load
for the wall of that building. So, keep that in mind in terms of design. You will have a snow rail,
you will have a guarded system up on that building. – And the snow guard manufacturers will do the layout for you. – Yes. – Take their guidance,
this is their expertise. And they take it very seriously. (upbeat music) – So we’re talking about snow retention, tell me why it’s important
to keep snow on the roof in the first place. – Sure. Well, there’ll be, again,
the areas to protect, people, cars, pets, gardens, all that. But you wanna keep it
on the roof, the main goal of a snow guard is to
keep the snow on the roof and allow it to very slowly
melt, rather than an avalanche. Or slide, which will, typically take out whats
ever underneath it. As we all know. – Yeah and you have, I’ve seen it. Homeowners, building
owners, things like that, call us up and say their first
winter with a metal roof, and they say “gee, I never
had this problem with a, “my shingle roof, what’s going on?” So, PVTF paints were really
designed from non-stick products or derivatives from that,
and the idea is that shingle roof is gonna retain
this more often than not, where a standing seam roof, especially a smooth painted system is just gonna shed it as much as anything, so often times it’s a surprise, you hope that it’s caught before it really becomes a safety issue, or an emergency issue. So the science behind it really is, you’ve got a smooth surface and you’ve got a snow load on your roof. Call it six inches of snow,
that’s easy to picture. So you’ve got a smooth
surface, six inches of snow, and then you have this
vector force of gravity essentially pulling this
down, and in a shingle roof it’s gonna do some to keep it on there. Without a retention system. So, to protect entrances,
to protect against this avalanche effect,
you really should have a snow retention system in place. Not only is it gonna be a safety thing, but in the winter time it’s gonna act as an additional insulator
for that roofing system. (upbeat music) – So we’ve been talking
about new construction here, what about re-roofing
on an older building? – If the deign for the
standing seam metal roof is a re-roof on an older building, and obviously, because it’s metal, we’re not going to have to address in the right geographic location, the need for snow retention,
if that’s so desired. In that scenario, you would typically have an engineer come in
and assess the structure and make sure that it could
handle the anticipated snow load that the snow retention
system would deliver. – So when you’re talking about the structure of the
system being engineered, we are often pushing
the metal roofing system being engineered and you eluded to the snow retention
system being engineered. So when you look at it from the ground up, you wanna have everything engineered, you wanna know how your
system’s gonna perform under certain conditions
and I think that’s the, one of the big reasons why we use S-5, it’s a non-penetrating clamp system. They’re engineered systems, they’ve done a lotta
testing with our panels and a lot of research
with metal roofing panels throughout the industry. Ones that we offer and ones that we don’t, so I think when we look at
partnering with the experts that’s really it, their system is really the originator of the clamp system, it’s tested, it’s true,
it’s lasted over time, and that’s really where we’ve been able to carry the accessorial type things for the metal roofing forward. Being an engineered piece that
is a component of our system that we know will perform with our system when installed correctly. – And if you come to us for design help, Like Lori mentioned earlier, we’re gonna make our recommendations, we’re gonna point you
in the right direction. But then the snow guard manufacturer’s really gonna take you
that next step further to answer your questions and
talk about your specific design when it comes to those snow guards. All right, well I’m gonna
wrap up today’s episode, thanks for being a part of
Standing Seam Metal Roof Design Series here on the
Metal Roofing Channel, stay tuned next week, we’ve got a video about
warranties coming up, so make sure you’re subscribed
so you don’t miss that. Comment below if you have any questions. Thank you so much for joining us, check us out at Sheffield Metals online, I’m Thad Barnette with Sheffield Metals, we’ll catch you next time. (upbeat music)

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