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A roof terminal is used to route ventilation air or exhaust air safely and neatly through the roof to the outside. The correct roof terminal ensures a proper connection to the air duct, watertight roof finishing and reliable air extraction.
At Hewa, you will find roof terminals for installers, service technicians, business customers and DIY users. When selecting the right terminal, check duct diameter, roof type, roof pitch, material type, watertightness, wind load, condensation risk, backdraft protection and connection to the ventilation system.
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Selecting a roof terminal
A roof terminal is used to route ventilation air, exhaust air or ducted air safely through the roof to the outside. The roof terminal forms the transition between the ventilation duct and the outside of the building. A correctly selected design helps prevent leaks, reduce air resistance and provide a neat technical roof finish.
The right choice depends on duct diameter, roof type, roof pitch, airflow, material type, watertight connection and the position of the ventilation route. For the broader category, also review air exhaust material for ventilation. For the duct route to the terminal, ventilation pipe is important. For visible air openings or finishing, ventilation grille may be relevant.
Important when choosing roof terminals
- Check the correct diameter and connection to the ventilation pipe
- Match the roof terminal to roof type, roof pitch and roof covering
- Check watertight installation, storm resistance and correct roof finishing
- Check airflow, free air passage and resistance of the duct route
- Allow for condensation, backdraft, wind pressure and rain ingress
- Ensure a firm, strain-free connection to the air duct
- Always check the technical requirements of the ventilation system, roof structure and terminal
Watertight roof finishing and reliable air extraction
With a roof terminal, watertightness is one of the most important points. The terminal must connect correctly to the roof covering and must not create leakage points. Depending on the roof type, installation may differ. A flat roof, pitched roof, tiled roof or metal roof requires a suitable solution and careful sealing around the terminal.
In addition to watertightness, airflow performance is important. A terminal that is too small, incorrectly connected or poorly positioned can cause additional resistance. As a result, the ventilation system may perform less effectively or produce more noise. Allow for duct diameter, bends, terminal length, outlet position and free discharge space above the roof.
For installers, it is sensible to assess the roof terminal as part of the complete ventilation route. Consider extraction point position, ventilation pipe route, condensation risk, backdraft protection, roof structure, service space and accessibility. A well-installed roof terminal contributes to a safe, durable and service-friendly ventilation installation.
Frequently asked questions about roof terminals
What is a roof terminal used for?
A roof terminal is used to route ventilation air or exhaust air through the roof to the outside. The terminal connects the air duct to the exterior of the building.
Which roof terminal do I need?
The correct roof terminal depends on duct diameter, roof type, roof pitch, airflow, roof covering, mounting position and connection to the ventilation system. Always check the technical requirements of the system.
Why is watertight installation important?
A roof terminal passes through the roof structure. The connection must therefore be finished watertight to prevent leaks, moisture problems and damage to the roof or interior finish.
Can a roof terminal affect ventilation capacity?
Yes, an incorrect diameter, too much resistance or poor positioning can restrict air extraction. Choose a roof terminal that matches the duct route and required airflow.
What should an installer check during installation?
Check diameter, roof type, roof pitch, watertight connection, storm-resistant installation, condensation risk, backdraft, free air passage, duct route and access for inspection or maintenance.