it is used around the edges of the roof
actually, it's used in the valley's and anywhere the roof meets an outside wall... drip edge is used on the edges, except in areas where precautions must be taken against ice-dams.
Flashing is also used where anything passes through the roof
It is used anywhere there is a protrustion in the roof. Flashing can also be found around hvac units, scuppers, etc...
An apron flashing is a term used for a flashing located at the juncture of the top of a sloped roof and a vertical wall.
One can install roof flashing by various steps. You can find these steps on several websites. A website you can look on for installing roof flashing is YouTube.
Step flashing is used in two applications on roofs. 1) Around skylights/roof windows (eg. Velux). 2) Around the base of chimneys.
There are two meanings for a roof aprona flashing material, similar to a drip edge, that is installed at the bottom of a roof, channelling the run-off away from the fascia and into a gutter;a flashing along the edge of a roof where it butts into a wall that goes higher than the roof. The flashing directs water away from the wall and onto the roof.
They ARE used when quality and longevity is needed for leader lines, roof drain flashing material
Lead flashing.
A dormer is a small piece of roof that projects from or is not in plane with the main roof plane. It has a junction with the main roof and this junction is where the flashing is required. Dormers can vary in shape, so the exact form of flashing required will vary. The type of flashing also depends on the roofing material, and whether the same material is on the main roof and the dormer roof. If the main roof plane and the dormer are of the same material, the flashing can usually be the same as used on a similar junction of the main roof. Important parts of a basic flashing are: * it laps from under the upper or higher roof cladding so that water will run down onto it from the higher cladding, and it laps over the lower roof cladding so that water running down it will run onto the lower cladding, rather than underneath the lower cladding. Flashings that run parallel to the fall of the roof are a little different but follow the same principle: look at the path the water will follow. * It is lapped a sufficient distance under and over the cladding to prevent water seeping back. This distance will depend on the roofing material, the material's profile, the strength of wind in the area and the rainfall of the area. * It may also need a return or kickback on the flashing to prevent capillary action or wind driven moisture. Flashing materials must be compatible with the roofing material. Water running over some materials will collect ions that may make materials that this water then runs onto be stained or corrode quickly.
A drawing that would show how high the flashing and counter flashing is going to be on a roof plus the various penetrations and pitch pockets and leader lines and possibly a scupper
flashing is usually done with tin, nails, and roofing cement.. I suggest you go to Youtube and in the Search Bar type in "flashing A Roof"-- check out the insightful How -To -Videos.
Tin, lead or copper
For when he has to haul over-dimension loads.
Install the sill flashing first, according to the manufacturer's instructions. As a rule, flashings are nailed into the curb and sometimes cemented to the roof with plastic roof cement, but not nailed to the roof.