Why Do I Hear a Knocking Sound in My Walls?
Doing home repair projects can be somewhat intimidating and, at times, overwhelming. But by understanding the source and nature of common problems you can save money and time by resolving them yourself.
One problem that bewilders many homeowners is they hear mysterious knocking or tapping coming from their walls. Fear not, as most of the causes behind this sound are easily explainable and can usually be resolved.
Common Causes of Knocking Sounds in Walls
- Pipes. If there is a sound coming from cold water pipes then it is most likely water hammer, a situation that happens when a valve is closed abruptly and causes a pressure wave to travel through the pipes. This is a common issue in older homes and can usually be resolved with a water hammer arrestor, which can be easily installed at plumbing supply stores.
- Wiring. If you hear popping or clicking in the wall then this could be simply an electrical wire that is loose or arching against another wire, and will require immediate attention from an electrical technician.
- Thermostat. If the device that controls the HVAC system is not calibrated correctly then it could be the source of irregular clicking noises coming from the walls due to its internal mechanical components interacting with the thermostat.
- Animals. If there is a tapping sound coming from the walls then it could be small animals such as birds, squirrels, bats, or rats trying to get into the walls to build nests or find warmth. To stop this noise it is important to seal any open areas or access points.
No matter what the noise is coming from your walls, it is always important to do thorough investigations to determine the source. If a more pervasive problem is present then it is best to contact a professional who will be able to diagnose and repair it.
1. Is the knocking sound inside or outside of the walls?
The answer depends on the location of the knocking sound. If it is coming from inside the walls, then it is likely due to plumbing or some other mechanical issue. If it is coming from outside the walls, then it could be a sign of an animal or pest problem.
4. Does the knocking sound seem to have a consistent pattern or does it come and go?
The knocking sound seems to have a consistent pattern, coming and going in regular intervals.
5. Are there any other obstructions in the walls that could be causing the knocking sound?
Possible obstructions in the walls that could be causing the knocking sound include loose pipes, wires, ducts, or other mechanical components that are connected to the wall, as well as any obstructions within the wall cavity. Additionally, if the knocking sound is consistent, then there may be an issue with the building’s foundation or structure that is causing the sound to reverberate through the walls.
3. Could animals or pests be responsible for the knocking sound in the walls?
Yes, animals or pests could be responsible for the knocking sound in the walls. Rodents, such as mice and rats, and large insects, such as carpenter ants, can cause a knocking sound if they are inside the walls. It is important to inspect the area to determine if there is a source of the sound and identify the responsible animal or pest.