Step-By-Step Guide: How To Build a Soundproof Generator Box?

Is the noise from your generator driving you crazy? Our tutorial on how to build a soundproof generator box will help you create a custom enclosure that reduces noise and provides a peaceful environment. Read the full article!

The only complaint I have with the generator is the noise. They can be an absolute pain in the ass, even the most modern and quiet inverter generators like Champion 2000 watt or Generac 2000W can be a bit noisy.

They make it difficult to relax or focus on anything else while they’re running near you.  Just ask my neighbors!

Fortunately, there’s a simple and effective solution: a soundproof box! A soundproof box is an enclosure that can reduce the noise produced by a generator and make it more bearable to use.

How to Build a Soundproof Generator Box in 8 Steps?

Step 1: Take Measurements:

Take Measurements

To build a soundproof generator box, the first step is to measure and cut the plywood. the first step in making a soundproof box for your generator is to measure the length, width, and height of your generator.

This will help you determine the size of your box. Once you have these measurements, use a saw to cut the plywood sheets to the correct size.

Leave some space for the insulation, but not too thick so that it becomes too heavy to move.

Step 2: Create the Frame:

Create the frame using the plywood sheets. You can use hinges to attach the sides of the frame together. The frame should be sturdy enough to hold the weight of the generator and provide a secure enclosure.

Step 3: Add Insulation:


Adding a layer of soundproofing insulation to the inside of the frame will help to reduce the noise that your generator produces.

You can use a variety of materials for this, such as acoustic foam or fiberglass insulation. I would suggest mass-loaded vinyl. You can find it in any hardware store.

The insulation should be cut to fit the dimensions of the frame and attached to the inside using adhesive or staples.

You can also install an internal layer of plywood to create a space between the insulation and the generator.

Step 4: Install Mass Loaded Vinyl:

Mass-loaded vinyl is a specially designed material that is used to block sound waves and reduce noise.

Adding a layer of mass-loaded vinyl to the inside of the frame will further reduce the noise that your generator produces. This material is easy to cut to size and can be attached to the inside of the frame using adhesive.

Step 5: Install a Ventilation System:

Once you have finished the sound-dampening box, it is important to install a ventilation system to prevent the generator from overheating or possible CO (carbon monoxide) buildup which is hazardous in its own rights.  

A ventilation system can be as simple as drilling small holes in the bottom and top of the box to allow for airflow, or you can install a small fan to circulate air.

The size and placement of the ventilation system will depend on the size of your generator and the size of the box.

With proper ventilation, your soundproof box will not only reduce the noise from your generator but also keep it safe from overheating. Ventilation is also important if you want to run your generator in a garage.

Step 6: Add a Rubber Surface to Absorb Vibrations:

Adding a layer of rubber to the inside of the frame will help to absorb vibrations. It is super-efficient for Generator noise reduction

The rubber surface can be cut to fit the dimensions of the frame and attached to the inside using adhesive or staples.

This will help to reduce the amount of noise that escapes from the box and make it more comfortable to use.

Step 7: Finish the Installation:

To finish the box, attach the remaining plywood sheet to the top of the frame using hinges. This will create a lid for the box, which can be opened and closed to access the generator. You can add latches to keep the box securely closed and prevent any noise from escaping.

Step 8: Place the Generator in the Box:

Once you have finished the soundproof generator housing, you can place your generator inside.

Make sure that the generator has enough ventilation so that it does not overheat.

It is important to monitor the temperature of the generator while it is inside the box to ensure that it is not overheating.

This sound-blocking enclosure can overheat in the summer so make sure to monitor every now and then. Read this research about modified generator silencers if you want to increase your knowledge on the topic.

Final Words

Building a soundproof generator box can greatly reduce the noise produced by a generator and make it more bearable to use.

The eight steps to building a soundproof generator box include taking measurements, creating a frame, adding insulation, installing mass-loaded vinyl, installing a ventilation system, and adding a rubber surface to absorb vibrations.

Various sound-blocking materials for generators can be used, such as mass-loaded vinyl, acoustic foam, and fiberglass insulation.

A soundproof generator housing can be built using simple tools and materials that can be found at any hardware store, and it can be a cost-effective and easy DIY project to undertake.



Kashif has been a valuable asset to the electric generator industry for over 5 years. Now, As a skilled energy engineer, he’s been on the front lines of diagnosing problems, fixing broken parts, and performing routine maintenance tasks to keep generators running smoothly.

Leave a Reply

Your email address will not be published. Required fields are marked *