By john carroll download the pdf version of this article.
Flashing where different roofs meet.
Valleys are those areas of the roof where two sections of roof meet at a joint and form an angled dip.
In this spot it s possible that water could flow down the wall and slip past the shingles into the building below.
Today the flashing is on top of the siding.
At joints and penetration points.
Now nail this first flashing at both its far ends.
489 78 kb my business partner and i recently added a large screened in porch with a gable roof onto a client s home.
This flashing may be behind wood siding or in front of a brick wall.
Remember to caulk the underside of the flashing with a sealant.
Step 6 install the flashing.
It runs all the way down to the drip edge which it should overlap slightly.
Materials for roof flashing.
L shaped flashing is a versatile general use flashing used where a uniform or strengthened finish is needed on a 90 surface.
Some roofs stop at a vertical wall.
Valleys are the number one area where shingles will erode and roof leaks will happen if valley flashing is not installed in them.
A metal flashing must be in place to direct water streaming down the wall away from the stopping point of the shingles.
This flashing comes in a v or w shape.
Joining two roofs of different pitches.
The porch joined the house at right angles to a shed roof section.
Gently bend the flashing using the edge of the lumber.
Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present.
There is another place that roof flashing has now invaded.
The gibraltar building products l flashing protects your home the gibraltar building products l flashing protects your home from moisture infiltration where your wall meets your roof.
Place the 2 by 4 inch piece of lumber along the center of the flashing.
While installing flashing is not the most exciting part of roofing it is one of the critical components that a roof cannot do without.
Slide the right edge of the flashing under the highest roof pitch.
The flashing should extend over the shingles at least three inches.
Roof flashing on a porch roof.
Traditionally the flashing was installed and hidden under the siding.
Step flashing ensures that water is directed away from the wall and ends up in the gutter.
If your flashing is new you may need a bonding primer.
Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies.
It is at the back of the porch roof where the roof meets the house siding.
