Drip edges have two key purposes.
Proper roof flashing.
A look at roof design.
Using proper flashing components and maintaining penetrations like skylights are critical to the performance of the roof as a system newer technology in flashings and roofing materials not to mention product performance levels has improved greatly in the last 20 years and flashing components need to be consistent with the new roof.
Direct water away from fascia.
Due to cohesion surface tension and other forces water droplets tend to stick to one another and to the surfaces they are on albeit slightly.
Galvanized sheet metal is most common but aluminum and copper find occasional use in specialty situations.
Although roof flashing is occasionally fabricated from plastic roofing felt or rubber it is usually made of rust resistant metal galvanized steel aluminum or copper.
To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width.
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.
Roof sheathing underlayment roofing material roof intersections flashing details and ventilation.
Proper flashing around a chimney includes two layers.
Above the flashing lip the groove is sealed with mortar or with a sealant.
Here s a look at some general principles of roof flashing that will help guide you through a proper repair or replacement or even new construction.
While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.
Proper roof wall flashing example.
The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.
Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney.
Aluminum flashing is very popular for do it yourself.
And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight.
All roofing systems are made of a number of different components.
The first is called step flashing.
