Popping Ductwork: Why It Happens and How to Mute the Noise

Ductwork is an important but often annoying component of any forced-air heating or cooling system. If your ducts have started making popping noises, you’re probably wondering what’s causing the problem and if there’s anything you can do about it. Here’s a quick overview of why your ducts might be popping and what you can do to reduce the noise.

What Causes Popping Ductwork?

The solution is related to how heat affects metal. When cold air from the ducts collides with hot air from the furnace, the metal expands quickly. As a result, the ducts may create loud popping noises. 

Should You Be Concerned?

There’s no reason to be concerned if your ducts are generating this type of noise. It’s not a sign of harm, and the noise will go away after the metal has had a chance to fully expand. 

How Can You Mute the Noise In the Meantime?

Investing in some soundproofing material can assist mute the sounds. This will help to create a more peaceful environment in your home until the popping noises subside. 

    Types of soundproofing materials include: 

      -Fiberglass insulation 

      -Mass-loaded vinyl barriers 

      -Acoustic foam panels 

       -Soundproof curtains 


Popping ductwork is nothing to be concerned about, but it can be quite bothersome. By understanding what causes the popping noise and taking steps to mute it, you can enjoy the peace and quiet in your home once again.  

If your ductwork has started making popping noises, there’s no need to worry—it’s not a sign of damage or harm. The noise is caused by cold air colliding with hot air, which causes the metal to expand quickly and make popping sounds. To reduce noise in the meantime, consider investing in some soundproofing materials like fiberglass insulation, mass-loaded vinyl barriers, acoustic foam panels, or soundproof curtains. These materials will help muffle the noise until it subsides.


We offer air duct and dryer vent cleaning services in the Greater Sudbury area. Call or text  today for a free estimate at 705-996-4553


Learn more about duct cleaning . . .

What are signs of mold exposure
JC Densing

What are signs of mold exposure?

Mold Exposure: How to Recognize Symptoms and Protect Your Health Mold exposure is a serious health risk that should not be taken lightly. Mold can

Why is my closet so dusty
JC Densing

Why is my closet so dusty?

The Dirty Little Secret: Your Clothing Habits May Be Making Your Closet Dustier Than You Think! We’ve all seen dust build up over time. But

Table of Contents

Scroll to Top