Bathroom Vent Flap Noise From Wind

The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home.

Bathroom vent flap noise from wind.

Four bolts were put through the flap towards the bottom to add weight to prevent flap from open so often and reduce the angle of swing and electrical tape was applied where the flap contacts the body of the vent to soften the noise. There are a couple of things that can help to reduce the problem. Those others are roof attic vents. Noise is often a problem unfortunately which is caused by the flaps that close the vent off when the fan is inactive.

Although not the cheapest will solve the problem. Often a stiff wind will open vent dampers causing them to periodically clang shut. Either apply this thin foam strip to the flap disc or to the edge that the flapper rests on whichever is the easiest. If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem.

This simulates the on state of the fan. Hube nov 14 2007. This noise can get annoying but there is a remedy for it. The flap still moved when the wind is blowing.

The noise is because the flapper is hitting on a metal to metal surface. Easier fix should not interrupt the air flow. If this noise is annoying the flaps can be replaced with ones that are electronically controlled. When the gust of wind stops the velocity of air by the vent reduces to zero and the pressure increases thus suddenly stopping the flow of air and making the flapper close hard enough to be heard.

Putting a magnet on may cause recir of the humidity from the vent. Sometimes wind and roof vents do not get along well. The flapper should have a thin piece 1 8 of foam stripping to sit on when closed this foam strip will stop the noise considerably. Same effect occurs when the shower curtain is drawn to you in the shower.

This flapping noise comes from the wind blowing from the other side of the house. You are probably better of putting a stick on felt pad on the flap itself so that when it does bang it is more muffled. This pressurises the house a bit on one side and depressurises it on the side of the exhaust hood. Another step would be to alter the angle that the vent is installed.