Flashing is an essential part of any roof and functions to prevent the passage of water into the roof from a joint
Types of Flashing
There are three main types of flashing that are typically used in roofing applications: Apron flashing, Chimney flashing and Step flashing.
Apron flashing (also known as cover flashing) is the most common type of flashing used in roofing applications, mainly due to its versatility. This type of flashing can be used on the front and backs of chimneys, abutting brickwork on flat roofs, or where a roof meets the brickwork of a house or outbuilding. It is also used on slate and tile roofs where they meet a wall or a porch, on conservatory roofs, and around bay windows.
Step flashing allows a roof to abutt brickwork in situations where a lower height roof runs into a wall, a roof meets a chimney, or a conservatory roof meets the wall of a house. The ‘step’ refers to the pattern created in the lead by a series of cuts that allows the lead to penetrate into the courses between the bricks that resembles the steps of a staircase.
Chimney flashing specifically prevents water from entering the building at the point where the chimney meets the roof.