The Parts of a Roof and their Functions


parts of a roofRoofs require regular maintenance, but wouldn’t it be nice to understand the function of each part, so you know when something is awry? We are here to help explain each aspect that way you have the power of knowledge when it comes to fixing it yourself or knowing when to call a professional.

What are the Parts of a Roof?

Each part plays a role in protecting the home from moisture or increasing airflow. Some homes may not have every part depending on the architecture of the home. However, the more you know the better you can prepare for any problems.

Chimney Flashing

In general, flashings protect your roof in areas where water could penetrate the roof. A chimney flashing is a piece of metal that is underneath the shingles to deter water away from the chimney.

Drip Edge

A drip edge is another type of flashing that is placed at the edges of the roof in order to keep water away from the fascia.

Roof Ridge

The ridge is the horizontal line where two planes meet, creating the highest points on a roof. This can also be referred to as the physical beam that is used for building the ridge.

Roof Cap

Roof caps are meant to release the hot air in the attic while allowing cooler outside air to penetrate the roof. Keeping a lower temperature mitigates the risk of moisture and mold.


A roof valley is formed when two slopes meet, creating a path for water to flow off the roof.


A hip is the external angle at which adjacent sloping sides of a roof meet. A hip doesn’t have any vertical ends.

Hipped Edge

Using a dihedral angle triangle, a hipped edge is the intersection of two adjacent planes.

Rain Gutter

Rain gutters are installed underneath the edges of the roof to capture rain and guide it off the roof and away from the foundation of the home. Be sure to clean your gutters at least a couple of times a year.


Also known as fascia boards, run along the outer walls where the house meets the roof. They are often added for extra support against water penetration and increase the home’s appeal.


Another feature that prevents moisture from entering the attic, mitigating the risk of mold. Soffit boards can be found between the eaves where the fascia and gutters meet. Note, if you don’t have a roof overhang, you will not have soffits.


Eaves are added protection against water and add an aesthetic appeal similar to the fascia.

Roof Vent

Like all vents, the purpose is to circulate air to prevent humidity and a build-up of moisture. The roof vent is the foundation of any attic ventilation system.

Roofing Experts for your Next Roofing Project

A strong roof ventilation system starts with ensuring protection against water and increasing the flow of cool air.  We are here to help you keep your roof in tip-top shape. If you are having problems with moisture, airflow, or need a new roof, reach out to us. We can help you with all of your roofing needs. 

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