Attic Vent Noise

Lift up the edges of the surrounding roof shingles so you can see the edges of the vent.

Attic vent noise.

Cut through any sealer that may be present. The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting. Roof vents and power roof vents are made to work in conjunction with vented soffits so that outside air will replace superheated attic air during hot summer days. 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.

Climb onto the roof and locate the vent that is causing the noise. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. Often a stiff wind will open vent dampers causing them to periodically clang shut. Here we explain the causes and cures of these problems.

A loose attic vent or shutter on a window can make a banging noise in the wind. Air passing through ducts and radiators can sometimes create a loud noise as can water passing through pipes. If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem. This problem is pretty easy to fix.

Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. Heating ducts as they cool also make banging noises as do. 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. Remove the current worn out bearings and replace them.

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

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. 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.