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Hi, I'm on a job in Fairfax, Virginia and this in this video, I'm going to
show you how to replace a roof pipe flashing step by step procedures. And
the materials you're going to need to complete this job are a flat bar,
just like the one I'm using, and a hammer one and a half-inch galvanized
roofing nails, a utility knife, and Geocel Tripolymer sealant that you can
buy from any roofing supply house, and of course, the matching color
shingles.
Notice easy it was for us to pop the nails up with the flat bar so the
shingles can be removed. Once the shingles were removed then the old
flashing is removed and the new one is placed in position making sure that
the flashing goes underneath the shingle above.
When that's done, we can then fasten the outside corner with one and half
inch galvanized roofing nails. Never place any nails through the flashing
on the sides or anywhere directly above, only on those four corners. And
then seal that nail head with DSL [inaudible 00:01:11].
Now we're applying the sealant along the outside edge on both sides so that
the new shingles can be adhered to the flashing to prevent water from going
underneath the shingle and seeping underneath the flashing and causing
leakage anywhere directly below the roof pipe flashing.
During this video, I'm going to stop a few times so I can explain to you
certain procedures and why they're being done, like this, why this shingle
was slid underneath the adjoining tab and why this shingle was slid under
this adjoining. I'll stop it now.
Okay, the reason why this shingle was slid underneath this tab is to close
up the key mark. The key is where one tab, this tab, joins up against this
tab is called the key. This is called the three-tab shingle, and these keys
are a set pattern throughout the entire roof. Now let's make believe this
shingle is not even here, and someone is going to replace it with an open
key, a small shingle that from here to the edge of the roof pipe ***.
All right, so now they've fastened a small little shingle down with an open
key.
That has just created a problem, because if you lift that shingle up you
will see the outer edge of the roof pipe flashing edge. You'll see the
flashing underneath, and you will also see the nail underneath as well. So
that will cause leakage directly anywhere below here. So now the reasoning
for this wide shingle here is to close up these open keys on both sides,
because this shingle is going underneath this tab to about this point. Once
that shingle is slid underneath the tab, then we can nail it down and now
we have just closed up that key and there's no way that water is going to
be able to seep between these two shingles and skip over to where that nail
is holding the flashing down.
Notice how the nails are being fastened on the outside edge of the flashing
[inaudible 00:03:40]. That's the right way to do it.
And you have to fasten [inaudible 00:03:57] out here, because if we only
put one here, this shingle will slide or could slide, so you always put a
nail here to hold it in place.
Now we're sliding in a new pre-cut shingle into position. And lifting the
top shingles up so that this one here can be slid underneath. And once it's
placed in position, then we fasten, we lift this shingle up and we put a
nail in the new place and when we fasten this one [in] we make sure that we
keep our nails far away from the flashing and don't have the nails anywhere
near the keys.
Notice how this shingle edge here is resting up against the rubber collar.
That's a problem. So what you always have to do is you've got to cut the
outside edge so it doesn't cut through the rubber collar and cause leakage
directly below.
Next what we'll do is we'll lift this tab up, apply Geocel Tripolymer sealant to
the underside of the shingle to prevent leakage and shingle blow off.