Attic Vent Noise

The mount can become loose especially on fans that are installed on the roof.

Attic vent noise.

This problem is pretty easy to fix. A loose attic vent or shutter on a window can make a banging noise in the wind. The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home. Air passing through ducts and radiators can sometimes create a loud noise as can water passing through pipes.

Attic fans also have small ball bearings that help lubricate the fan s movement. Heating ducts as they cool also make banging noises as do. Lift up the edges of the surrounding roof shingles so you can see the edges of the vent. Remove the screws holding the vent in place.

Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. This is actually the most common noise issue with attic fans. Of course you try to make the attic scuttle hole use air tight trim on your ceiling cans but it would be foolish to ignore the benefits of a reasonably powered attic fan working in connection with adequate soffit venting. When you hear a banging coming from the attic and are trying to determine the cause you are most likely dealing with one of these four animals.

Here we explain the causes and cures of these problems. In order to get rid of the hum you need to either operate the fan at a low speed or replace the fan with a new one that has more blades. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. Building noises such as gurgling drains and some building odors sewer gas methane toilet smells are often traced to defects in the plumbing vent system.

If it s loose it will wobble and vibrate against the surface creating a huge racket. Cut through any sealer that may be present. Climb onto the roof and locate the vent that is causing the noise. If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem.

Often a stiff wind will open vent dampers causing them to periodically clang shut. A loose shutter on an attic window or loosened attic vents can cause a banging sound if it s windy as can branches hitting the roof.