Roof Vent Flaps In Wind

Often a stiff wind will open vent dampers causing them to periodically clang shut.

Roof vent flaps in wind.

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. Lift up the edges of the surrounding roof. 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.

These types of vents are easy to remove and clean which prevents clogging. Cheap metal vents can be very loud and obnoxious in the wind. This is usually just a few screws. This pressurises the house a bit on one side and depressurises it on the side of the exhaust hood.

This video is my attempt at keeping mine from clanging in the wind. With gusts of wind that causes air to actually move from the house out through this exhaust duct. The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home. This actually seemed to work pretty well.

If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem. This is one that has been bothering me and a lot of my neighbors. When the vent hood fan is shutoff and the airflow diminishes and the flapper begins to close. The vent in the video is.

The high quality plastic and resins used are durable uv resistant and will last for years. Set the screw aside for reuse later. Oversize flanges accommodate water tight installation. There are a couple of things that can help to reduce the problem.

Disconnect the vent tube from the problem vent in the attic. How to keep a roof vent from flapping. We had a satisfied customer submit this video to us to prove a point. This flapping noise comes from the wind blowing from the other side of the house.

Vertical vents were a source of whistles and banging flappers.