Roofing Guide
Why Roof Ventilation Matters
Ambia pays attention to ventilation because an overheated attic, combined with moisture, can be damaging to roof decking and roofing shingles, causing them to distort and deteriorate prematurely.
Good ventilation creates a cooler attic in the summer. Good ventilation creates a drier attic in the winter and helps reduce the conditions that can contribute to ice dams.
Good ventilation serves two main functions:
- Moves hot air next to the roof deck out of the attic in the summer.
- Dilutes and removes the moist air in the winter before it can cause damage.
Different types of ventilation
There are many different types of roofing ventilation. Each has its own characteristics and is well suited to particular installations.
Static Vents - The least expensive option, well suited for providing ventilation in the immediate area where they are installed.
Gable Vents - Work well when wind direction allows airflow across the attic between vents.
Turbine Vents - Generate strong airflow through wind-driven movement.
Power Fans - Provide a high airflow. They use energy to operate, so they create an ongoing expense. Fans controlled by a thermostat will usually operate in the summer to remove hot air.
Ridge vents
A ridge vent is positioned along the entire length of the roof peak. In addition to being excellent exhaust vents, ridge vents blend in with the roof line, making a more attractive home.
Ridge vents with external baffles, combined with undereave venting, can be an efficient and effective ventilation setup when the roof and attic conditions support it.
