How many types of flashing are there?

There are two general types of flashing used in masonry construction. The first is external flashing (exposed flashing) and the second is internal flashing (concealed flashing). External or exposed flashings prevent moisture from penetrating into masonry walls where the wall intersects the roof.

Is L flashing the same as step flashing?

Next, L-shaped pieces of metal, typically aluminum, are placed under each shingle that butts up against the vertical wall. One side of the L-shape lays under the shingle, and the other side attaches to the side of the wall. This layer is called the step flashing.

Does flashing go over or under shingles?

Flashing should overlap the roof-covering material, but on asphalt shingle roofs, for aesthetic reasons, the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs.

What is roof vent flashing?

What is flashing? Flashing is placed around areas of the roof’s surface where a projection, such as at a chimney or skylight, intersects with the roof. If not sealed properly, these areas often succumb to serious leaks. These intersections expand and contract depending on temperatures and humidity levels.

What is flat roof flashing?

Essentially, flat roof flashing is strips of metal that are bent at a 90-degree angle. Their main purpose is to act as a defense against rain, snow, ice, moisture and even some debris. A roofer would install flat roof flashing wherever a potential risk of either of these things exists.

What is drip edge flashing?

Drip edge is metal flashing installed at the edges of the roof to keep water away from your fascia and from getting underneath your roofing components. If your roof doesn’t have drip edge, water gets behind your gutters and rots out both your fascia board and roof decking.

What is a cap flashing?

Counter-flashing (or cover flashing, cap flashing) is a term used when there are two parallel pieces of flashing employed together such as on a chimney, where the counter-flashing is built into the chimney and overlaps a replaceable piece of base flashing.

What is Counterflashing and flashing?

Counter-flashing is designed to prevent moisture from entering behind the vertical flange of headwall or sidewall flashing. Sometimes, the exterior wall-covering material serves as the counter-flashing, and sometimes a separate counter-flashing might be installed.

Should you caulk flashing?

Flashing acts as a waterproofing layer for this type of siding, and caulking will prevent the flashing from doing its job. As far as trim boards are concerned, you should not caulk around these areas if they sit on top of the surface of your siding.

What is Pipe Jack flashing?

They go on the roof for where pipes penetrate your roof. Pipes have to come up through your roof to service the house below. Every drain in your house has a pipe that penetrates your roof. to protect your home you want to put these on there to prevent water from coming in.

What is chimney flashing?

Chimney flashing is a type of roof flashing that creates a waterproof seal to protect your chimney and roof from water damage and penetration. Step flashing is an L-shaped piece of metal that lies under the roofing shingles and along the brick of your masonry chimney.

What are types of roof flashing you need to know?

These are the key types of roof flashing you need to understand: Continuous flashing: Continuous flashing is also called “apron flashing” because it acts a lot like an apron. Base flashing: Some roof features, such as chimneys, require two pieces of flashing. Counter-flashing: Placed opposite to base flashing, or above base flashing, counter-flashing completes the two-part team.

What is the best material for roof flashing?

Copper flashing is one of the best materials available for chimney or roof flashing. It is lightweight, resists breaking or cracking, and can withstand high temperatures and extreme weather. Copper is also one of the most expensive materials to use.

Why is flashing important for a roof?

Flashing a roof refers to the act of installing various waterproof materials in valleys, joints, edges, roof penetrations and any other gaps to prevent water damage or leaks . This form of protection is a necessary construction practice, and it’s widely applied to commercial, residential and industrial structures.

What is roof flashing and why do you need it?

Roof flashings are fitted primarily to maintain a watertight roof. Without a flashing fitted, rain water would run down the chimney, or the higher area of roof tiles, and just disappear into the house interior where the chimney rises through the roof.