Open valleys have metal flashing to protect this critical area of the roof.
Flashing on roof lifting.
Roofing flashing lifting up.
Roof buckling can occur in any roof at any time after roof installation.
The flashing is located at intersection points on your roof in spots such as peaks and valleys where water is likely to collect and pool.
Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound as shown at right.
Use a caulking gun to seal the vent flashing.
Then spread the roofing cement under the shingles that are surrounding it.
Here is a guide on how to install lead flashing to your roof.
Apply enough bead as determined by you between the vent pipe and the flashing.
The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.
And in our experience when a single piece of flashing extends only a few inches under the shingles especially on a long roof slope and worse on a roof that happens to slope slightly towards rather than away from the abutting vertical building wall the accumulated roof drainage water near the bottom end of the roof wall intersection will.
Step 4 generously apply roof cement.
It may be quite a labor but it pays off with a strong roof.
If you are working with valley flashing lift the edges of the surrounding shingles and spread roofing cement on the flashing about 6 inches in from the edge of the shingles.
It is important to take great care in lifting the shingles because you don t want to cause any damage.
Step 3 gently lift the shingles.
While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.
It can be made of galvanized steel copper aluminum or even vinyl you will find it under the shingles running along the peak of a roof but also around chimneys vent pipes and skylights.
Apply roofing cement 6 inches from the edge below the shingles.
Flashing is critical to certain areas of your roof namely the places where the roof surface meets a wall sidewalls and front walls the low points where two roof slopes meet called valleys roof protrusions bathroom kitchen vents skylights and the roof s edges rakes and eaves.
Some solutions for shingle buckling are to allow moisture to escape the roof remove the shingles and the areas that are affected ensure the attic is properly ventilated.
Step 5 seal vent flashing.
