Leaks from ice dams are related to flashing problems when ice dams occur the flashing and roofing along eaves fail to prevent water from making its way up underneath the roof covering materials.
How to use flat vinyl flashing on a roof.
This helps to prevent water from sliding around the aluminum flashing and into the roof area.
To get the best from the flashing you should fit of the sheet onto the side of the roof and the other half onto the building or addition which it is touching.
Open valleys have metal flashing to protect this critical area of the roof.
Coat the flashing with a zinc based primer followed by two or more coats of spray on rust preventive metal paint.
The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.
Above the roof sheathing.
Bent into an l shape.
You may want to paint the flashing to match the roof.
Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it.
Posted march 4 2017 filed under roof installation roof repair maintenance.
For information on how to prevent ice dams please see how to prevent ice dams.
How to install roof flashing against a wall.
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.
This flashing is typically field fabricated from a sheet of 26 ga.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.
Most flashing is 8 inches wide.
First use a stiff wire brush and solvent to clean the surface of any dirt debris or corrosion keep solvent away from asphalt shingles.
I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall.
I cut the tape so that it laps onto the housewrap above and 3 in.
While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
Step flashing step flashing redirects the water back onto the shingle.
