6 Easy Steps to Build a Quiet Generator Box

During blackouts, generators are the saviors. Also, if you are living in a state with frequent natural disasters, then the generators are the angels. However, the only issue with these power tools is their noise. The loud generator noise can easily annoy anyone and make a hard time for your neighbors.

So, we need a solution! To make these machines quieter, there is no alternative to building a soundproof generator shed. And, if you do not know how to build one on your own, this article can help you with the proper instructions on creating a soundproof generator shed. Let’s start!

Why Do you Need to Build a Soundproof Generator Shed?

Generators run with big powerful engines. And those powerful generator engines produce a lot of noise. Sometimes the noise level crosses the tolerance limit of 82dBa and can result in annoying situations. 

Yet during blackouts, there are no alternatives to using generators. So, the proverb goes,” to get something, you have to lose something,” and when using generators, you have to lose the peaceful environment. Also, the sound of generators can annoy your neighbors and result in disputes, primarily if your neighbor is a “Karen.” 

Also, high-frequency sounds can cause physical and mental harm. That so, the soundproof generator shed is the savior. This handy DIY solution compresses the generator’s noise and provides you with a peaceful environment to work in. Also, these sheds or boxes have multipurpose usage. Likewise, you can also use them to quiet other power tools like compressors and pumps. 

How to Build a Soundproof Generator Box – [DIY]

Building a soundproof generator shed is not tough if you have the proper guidelines. And, through our tests of building soundproof generator sheds, we have organized these steps on how to build a soundproof generator shed:

Step 1: Gather the Tools

Before starting the work to build a soundproof generator shed, you have to gather the essential tools and equipment you need. The tools you’ll be needing are:

  • Measuring tape
  • Wooden/ plywood sheets
  • Mass loaded vinyl
  • Styrofoam
  • Screws
  • Drilling machine
  • Grinding machine
  • Saw
  • Cutting table

Step 2: Take Measurements

When building the soundproof generator shed, getting the proper measurements is the key to getting the best results. So, take your measuring tape and measure the generator all the way. After you get the measurements of the generator, place the wooden sheets on the cutting table and mark a minimum of 6 inches wider than the size of the generator. You will need four pieces of sheets as the bottom will not get covered. This shed or box will only work as a cover. 

Step 3: Cut the Wooden Sheets

After marking the wooden sheets, proceed to make some clean cuts. Wear gloves and glasses and cut the sheets you measured with the grinding machines. And, make sure you get some finished cuts.

Step 4: Install the Mass-Loaded Vinyl and Styrofoam.

After cutting the wood by its size, the next job is installing the soundproofing materials. Again, we suggest using MLV and Styrofoam. So, cut them, matching the size of the wooden sheets. However, do not cut the soundproofing materials precisely on the same side of the sheets. Instead, cut them a minimum of 1 inch smaller on every side. It will help get all the pieces together and ease the screwing process. 

Note: whatever material you choose, choose the insulated ones. Insulated materials will absorb the generator’s heat and keep the shed cooler.

Step 5: Prepare the Ventilation Ducts

The next and most important step after you install all the soundproofing materials on the sheets is to create the ventilation ducts. As we have said earlier, generators run using big engines, emitting a lot of smoke. So, ventilation is a must. So, mark the point you want as a ventilation duct and make proper holes using the grinding machine.

Step 6: Assemble All the Parts.

Finally, it is time to assemble all the parts you have prepared. As everything is by measurement, take someone’s help and put all the wooden sheets together using the drilling machine and screws. Use at least 2-inch stainless steel screws, so the joints remain strong.

And, your soundproof generator shed is already. Now put some color on it and place the generator inside. Time to enjoy some quiet summer.


How Much Sounds Do Generators Make?

The sound of the generator depends on its size. A good quality generator makes a sound of around 50 decibels. And, an increase in each 10 decibel makes the generator ten times louder than usual. 

Is It Risky to Put Generators Inside Sheds?

It is not risky if your shed or box is adequately designed and has a proper insulation and ventilation system. However, if your shed doesn’t have the appropriate properties, it is risky to put the generator inside. 


Building a soundproof generator shed is not a tough task anymore with this guide we have prepared for you. Follow the guidelines as instructed to get the best results. Also, always buy the best quality generators that produce less noise. 

Moreover, never miss the ventilation duct step when building a soundproof generator shed. Otherwise, it can put you and your family at significant risk.

Patricia Mattice
Patricia Mattice

I'm Patricia Mattice, and I'm currently employed as a soundproofing engineer. I'm still acquiring knowledge about sound and soundproofing procedures. Furthermore, I am very good at noise management and like sharing soundproofing ideas and methods for any situation. Through our writing, we want to promote the best approach to making things soundproof.

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