Attic Vent Noise

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.

Attic vent noise.

This is actually the most common noise issue with attic fans. 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. 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.

Remove the current worn out bearings and replace them. If it s loose it will wobble and vibrate against the surface creating a huge racket. Lift up the edges of the surrounding roof shingles so you can see the edges of the vent. Often a stiff wind will open vent dampers causing them to periodically clang shut.

Heating ducts as they cool also make banging noises as do. The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. 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. 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. This problem is pretty easy to fix.

Remove the screws holding the vent in place. Air passing through ducts and radiators can sometimes create a loud noise as can water passing through pipes. Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. 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.

Attic fans also have small ball bearings that help lubricate the fan s movement. 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.