- Picking the right panel is critical for your project.
And things like location, building design,
local codes and requirements and look all factor in.
Today, we are taking a deep dive
into the SMI 1.5" Fastener Flange panel,
and learning about its application, installation,
and when you should and shouldn't choose it for your roof.
(upbeat music)
What's up, guys, welcome to The Metal Roofing Channel.
I'm Thad Barnette.
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We release metal roofing and metal construction content
every Monday and Wednesday.
In this series, we look at a specific profile,
and discuss when you should and shouldn't use it,
installation requirements, applicable engineering and more.
Our profile today is the SMI 1.5" Fastener Flange
standing seam profile.
It's a standing seam snaplock system.
And in this case, it's installed
with hidden fasteners on the male leg.
And the female leg snaps on to engage the panel.
You'll hear this profile type referred to
by a variety of industry names like fastener flange,
nail strip and nail flange.
Sheffield recommends a maximum 14-3/4" panel width,
and a minimum of 24-gauge steel
to ensure the panel has enough strength and rigidity.
This panel uses approximately
6-5/16" of material to be formed.
Just like other snaplock panels,
the 1.5" Fastener Flange is a hydrokinetic system
which means it must shed water quickly
to remain weathertight.
To do that, it must be at a slope at or greater than a 3/12.
An important note about this type of panel,
it doesn't use clips.
It uses fasteners installed directly in the slots
on the male leg, which pins the panel to the deck.
This can be problematic because it greatly reduces
the ability of the panel to expand and contract.
Because of this, Sheffield Metals recommends
that you only install at panel lengths of 25 feet or less.
Also, as the panel expands and contracts,
there's a possibility for the metal edges on the backside
of the slots to wear a hole through the underlayment,
so be aware of that.
Always check your local building codes
to make sure it meets the requirements of your area.
Engineering is important because it uses actual data
gathered about the exact panel profile,
and ensures that if you install your roof
per those specifications,
you're giving it the best chance possible to perform.
For the SMI 1.5" Fastener Flange,
there are currently no engineering tests available.
But this panel does qualify for the standard
SMI 40-year PVDF paint warranty and Galvalume warranties.
Sheffield Metals is working on upgrading
non-engineered profiles to have engineering,
so stay tuned for updates on that.
This panel is a good choice for residential projects
with slopes at or above a 3/12
when you're looking for an economical system
that has a seam height that's a little larger
than the one-inch fastener flange.
It's quick and easy to install and doesn't use clips,
so it's one of the cheapest hidden fastener
metal roofing systems out there,
and simple to do if it's a DIY project.
Don't use this panel over open framing,
at slopes below a 3/12,
if you have engineering requirements,
or if you have to run panels longer than 25 feet.
Make sure you do your research
and understand all the pros and cons
to this panel before choosing it for your project.
Next, let's look at how this goes down on a roof.
Make sure to follow any installation guidelines
or requirements available.
I've already fabricated these panels
with a one-inch bend at the eave,
and a one-inch box at the top.
But if you wanna learn how to do it yourself,
couple links in the description down below.
On the deck where the panel hooks onto the eave
is pinned on the box end with a couple fasteners,
and uses fasteners installed in the slots on the male leg.
Make sure the fasteners are installed
in the middle of the slot
to allow the most expansion and contraction possible.
Remember, you're relying
on the head of the fastener to hold down the panel.
So consider using a regular pancake head screw
as opposed to an ultra-low profile pancake
head screw to get the most contact.
And if you use a regular pancake head screw,
you will also need to use clip relief in your panel
to make sure the fastener
doesn't telegraph through the metal.
This bead of sealant prevents
siphoning of water at the end of the panel.
The next panel hooks onto the eave and snaps in place.
It gets pinned as well,
and the process repeats across the roof.
This tab that I left on the female leg
is optional and for aesthetics only.
You definitely don't need it,
but sometimes it's a nice touch.
And make sure to leave a gap at the eave
to allow for expansion and contraction.
The Sheffield Metals installation details
has a great thermal movement chart
that shows how much of a gap you should leave at the eave
based on the panel metal, deck material and panel length.
Details for this profile
are available at sheffieldmetals.com.
If you have a New Tech Machinery Roll Forming Machine,
and you run this profile,
the one-inch fastener flange uses the same male side rollers
as the 1.5" fastener flange.
If you wanna add the one-inch
fastener flange to your machine,
you'll only need to buy the female side rollers.
Both the 1" and 1.5" fastener flange profiles
are popular in the residential market
due to their lower cost and ease of installation.
If you wanna learn more about this profile
or other profiles that Sheffield Metals offers,
I'll link their profile page in the description down below.
Comment if you have any questions.
Subscribe here to The Metal Roofing Channel.
And as always, I'm Thad Barnette,
and I will catch you next time.
(gentle instrumental music)