Attic Vent Noise

Here we explain the causes and cures of these problems.

Attic vent noise. Air passing through ducts and radiators can sometimes create a loud noise as can water passing through pipes. The mount can become loose especially on fans that are installed on the roof. 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 the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem.

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. 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. This is actually the most common noise issue with attic fans. 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. Cut through any sealer that may be present. Heating ducts as they cool also make banging noises as do. Due to regular wear and tear these bearings can become worn out or lose their lubrication ability.

Attic fans also have small ball bearings that help lubricate the fan s movement. Often a stiff wind will open vent dampers causing them to periodically clang shut. The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting. A loose attic vent or shutter on a window can make a banging noise in the wind.

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. Remove the screws holding the vent in place. The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home. Remove the current worn out bearings and replace them.

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. 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.