In this video I’m gonna show you how to properly install step flashing on your shingle roof
Step flashing is essentially a piece of flashing bent to a 90-degree angle
and we actually install one piece of step flashing then install a shingle,
and this steps up like so.
What we use to make step flashing is actually what we call tin shingles.
These are just essentially 8-inch by 12-inch square pieces of metal.
They come pre-painted as well as just galvanized.
Now, generally, we like to go with the pre-painted step flashing
just to match the roof as close as possible.
So you can see we've got like a darker gray charcoal color roof we're installing,
so we're installing a dark gray roof.
These are pretty easy to bend by hand and don't need to be a perfect bend 'cause this
is gonna be all covered up.
So we'll mark this here, and that's all you need to do.
And now you're ready to start installing.
Now, the first piece of tin shingle we wanna fabricate slightly to improve our flow of water.
What you wanna do is bring it down to this point right here,
past the shingle's nailing tab.
Then what we wanna do is make a mark like this.
And actually, you wanna cut this down, and I'll show you the purpose of this shortly here.
And as always, we always wanna round off these corners here.
Just for aesthetics and safety purposes, just round it off slightly.
Now, the purpose of this is when we install it,
it's actually gonna help the water flow down,
as we don't want water to get into this corner here,
'cause this is our vulnerable corner right here.
So when we install this first piece, we're gonna install some adhesive back here,
some caulking.
Install this and any water flowing down here is gonna catch this lip
and flow down onto our shingle roof.
So this corner is what we really wanna protect with some adhesive caulking.
You can see what's gonna happen now as we press this down.
This joint is fully sealed.
So any water that tries to get in here is not gonna be able to.
And I'm gonna lift this up.
Generally, we wouldn't lift it up.
You can see that that corner is fully sealed now.
So we've got our first shingle, tin shingle.
We've got our tin shingle installed, our step flashing.
Now, we can install our first shingle up to it.
We wanna make sure that it's aligned here.
And we wanna leave a slight gap between the shingle and the step flashing
to allow for drainage in this area right here.
Now, the only difference is, similar to what we did around our pipe flashings--
if you haven't seen that video, you can refer to that--
around any penetration, we don't wanna nail right here, and you'll see why shortly.
When we install our next tin shingle step flashing,
we wanna make sure that this corner right here is not vulnerable.
So when we install this, this is gonna allow the water to flow on top of here
and will also hold the shingle down.
So that's it.
Essentially, with each layer of shingle, we install a new piece of step flashing.
We've installed our step flashing and shingles all the way up,
and now, we're at the back wall.
We wanna cut this and bend it over.
Similar to the bottom, we wanna make sure we have a good joint and good flashing between
here and this back wall right here.
So let's make a slight notch here.
And then fold it over.
So you can see here is what we came up with.
Now this is going to be the first piece.
We're gonna install one more to make sure we have a greater overlap.
So we've already installed this.
As I mentioned there's a small overlap here, just an inch.
We want to install one more piece to provide more protection,
especially in this corner right here.
So what we're gonna do is since we already have this,
we're gonna overlap this about two inches.
I'm gonna mark my corner right here.
And what I'm gonna do is starting here.
So all I did was make a 45 degree cut from right here to this corner.
Now what that allows me to do is bend this top here, and bend the bottom here.
When I install adhesive at this corner then install my saddle on top,
it's gonna provide for great protection in this area right here.
So that's our last piece of step flashing.
What we're gonna do is install one more shingle right here.
So we've finished the step flashing on this side.
You can see we've got our shingles, we've got our step flashing.
We still need to install a piece of counter flashing on top of this.
Now one thing I wanna show you in the meanwhile is how water acts
when we're pouring it down here.
So during a rain what's gonna happen is as water comes along here,
it's gonna constantly come off, roll off each one,
so it has no chance of getting underneath each shingle.
That's exactly what we wanna see.
And you can also see here that this lip helps water not come here.
My fingers here are completely dry.
So that's the reason we install step flashing here, as opposed to a long piece of L metal,
is to allow the water to constantly come off here and step onto the shingle below it.
Guys, thanks for watching.
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