Roof Vent Flaps In Wind

There are a couple of things that can help to reduce the problem.

Roof vent flaps in wind.

When the vent hood fan is shutoff and the airflow diminishes and the flapper begins to close. With gusts of wind that causes air to actually move from the house out through this exhaust duct. Set the screw aside for reuse later. If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem.

Vertical vents were a source of whistles and banging flappers. This video is my attempt at keeping mine from clanging in the wind. Lift up the edges of the surrounding roof. Disconnect the vent tube from the problem vent in the attic.

Oversize flanges accommodate water tight installation. Often a stiff wind will open vent dampers causing them to periodically clang shut. How to keep a roof vent from flapping. The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home.

Mounting the damper inside the vent protects it from damage and prevents noisy flapping from wind as well as better airflow. This actually seemed to work pretty well. Climb onto the roof and locate the vent that is causing the noise. When the vent hood fan turns on the air pressure rushing out forces the vent to open breaking the magnetic force holding the flapper closed.

We had a satisfied customer submit this video to us to prove a point. This is one that has been bothering me and a lot of my neighbors. The high quality plastic and resins used are durable uv resistant and will last for years. This is usually just a few screws.

Keep in mind that wind blowing across a vent opening creates a vacuum the faster things blow thus creating flap rattles as the wind gusts. This pressurises the house a bit on one side and depressurises it on the side of the exhaust hood. Sometimes altering the cap on the vent reduces the vacuum. The vent in the video is.

Cheap metal vents can be very loud and obnoxious in the wind.