Roof Flashing Basics (types of flashing)
- solvistaroofing2
- Jan 11, 2023
- 2 min read
Roof flashing refers to the thin strips of metal or other waterproof material that are used to prevent water from penetrating the joints and spaces in a building's roof. It is typically installed around protrusions in a roof, such as chimneys, vents, and skylights, as well as at the intersection of different planes in a roof, such as where a sloping roof meets a vertical wall. The purpose of flashing is to create a barrier to keep water from seeping into the structure, which can cause damage to the building's interior.
There are several types of roof flashing that are used in different situations. Some common types include:
1. Step flashing: This type of flashing is used where a sloping roof meets a vertical wall. The flashing is installed in a "step" pattern, with each step overlapping the one below it.
2. Counter flashing: This type of flashing is used on top of step flashing to provide an additional barrier against water infiltration. It is typically installed in the mortar joint between the vertical wall and the roof.
3.Valley flashing: This type of flashing is used where two sloping sections of a roof come together to form a valley. It is typically installed along the centerline of the valley and is used to channel water away from the joint.
4. Chimney flashing: This type of flashing is used to seal the joint between a chimney and a roof. It is typically made of metal and is designed to conform to the shape of the chimney.
5. Drip edge flashing: This type of flashing is used along the edge of a roof, where it hangs over the eaves. It is typically made of metal and is used to channel water away from the edge of the roof and into the gutters.
6. Base flashing: This flashing is used to seal the joint between the base of the wall and the roof.
7. Cap flashing: this type of flashing is used to seal the top of the wall and the roof.
these are some of the most common types of flashing used, but other types exist as well, depending on the specific requirements of the building and the roof system.
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