Flashing is a vital part of any roof. It keeps water away from any seals or joins, such as the edges of windows or skylights, and stops it from seeping into your home. What type of flashing you need will depend on your particular type of roof.
Step Flashing
Step flashing is a very common type of flashing. It is used where the roof joins a side wall. It would be very easy for the wind to drive the rain under your shingles, so it is vital that these joints are properly protected. This type of flashing is installed in overlapping layers, providing a series of steps that the water will run down. This will protect the joint from damage.
Continuous Flashing
This second type of flashing is also used when a roof meets a side wall. Instead of layers of metal, this takes the form of a single sheet that guides the water downwards to the shingles. It is sometimes known as apron flashing, as the metal forms a single apron that covers the joint. The apron will sometimes be in two parts, which allows for movement in the roof as the property ages.
Valley Flashing
Valley flashing is used where two sections of roof meet in a valley. It is usually installed over the top of the shingles and allows the water to drain away rather than pooling on the roof, where it could then leak into the house. It also has the advantage of stopping debris from building up in the valley, as the rainwater will flush it away. Valleys are a very vulnerable part of the roof, so it is vital that they are properly protected from potential leaks.
Kickout Flashing
Finally, kickout flashing is designed to bridge the gap between the roof and the gutters. It extends over the edge of the roof and ensures that the water runs off the roof into the gutter system, where it can be guided properly into the drains. If the rainwater does not find its way into your gutters, it can run down the side of the house or pool onto the ground. This can then cause problems with dampness and mould, which can be difficult and expensive to deal with.
Your roofing specialist will know what type of flashing needs to be installed on your roof. They will be happy to answer any further questions you have on flashings. Reach out to a roofing material supplier to learn more.
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