Generator Quiet Box: DIY Hacks For Building Soundproof Enclosure

Do you have a portable generator that makes a lot of noise? Building a generator quiet box would be an excellent way to reduce the noise produced by your portable generator.

But before you build a generator soundproofing enclosure, you should at least look at our top prebuild sound reduction boxes. They will save you time and effort to make one at your home.

If you don’t have money to invest or you are a DIY enthusiast, we will discuss with you a step-by-step process on how to make a soundproofing box for your generator.

So without further ado, let discuss the requirements of making a soundproofing quiet box.

The Requirement For Generator Quiet Box?

Generators are loud and annoying. They’re a necessary evil when it comes to power outages, but the noise can be unbearable for people who live close by or have to listen to them running all day long.

Generator quiet box is the most effective solution on the market, but in order for it to deliver:

It must reduce noise by 50% or more, which means that you can run your generator in your garage without disturbing anyone nearby.

The design should make it easy and quick to assemble and disassemble, so you won’t waste time trying to get everything into place before an outage happens. 

The air intake ports allow sufficient cooling while still keeping rainwater out of the unit when used outdoors; this ensures that no one will suffer from carbon monoxide poisoning if there’s inclement weather during an outage.

There should also be modular panels that make installing different sound baffles and fans easy.  

Generator Quiet Box: DIY How to build the perfect generator enclosure to reduce noise.

Before we discuss the steps of building a generator enclosure, let’s note down the tools and materials you might need so you can buy them at your local hardware store or can order them online.

Materials or tools you need to build a generator quiet box?

  1. Measuring Tape
  2. Medium Density Fiber Board or Plywood boards
  3. Circular or table saw
  4. Marker
  5. Glue and Chaulk
  6. Sound deadening or barrier material
  7. nails and screws
  8. screwdriver, nail gun
  9. Ventilation ducts

Building Generator Enclosure: Step by Step process

Follow these steps in the given order to build a fitting generator quiet box.


You should take the measurement of your generator twice. Add a few inches into each dimension to ensure a better fit.

Cutting the boards into the right size

You can buy MDX (Medium Density Fiberboard) or plywood boards at your local store, and can also order them online. Cut the boards into the right size using whatever saw available.

Mark all sides, the top, and the bottom using a permanent marker.

Making holes for ventilation:

Make a few holes on the boxes, because it will help with air circulation and keep the generator cool. Without proper ventilation, the engine temperature would rise to extreme levels and it may result in a disaster.

You should also make an opening for the generator cord.

Installing layers of soundproofing material:

Next, you will have to glue soundproofing material inside the walls. For better results, you should at least add two layers on top of each other.

The first layer could be of Vinyl MLV (Mass Loaded Vinyl) sound Barrier material and the second layer could be Foam matting made of closed-cell vinyl nitrile.

You can use green glue to seal all the openings.

There are very easy to find and would definitely be available at your local hardware store. However if not, you can order them online.

Assemble the parts, installing ventilation duct:

Lastly, you should assemble all the parts using screws or nails. I would prefer screws over nails as they make it easier to assemble and disassemble the generator quiet box.

You should also install a ventilation duct as need to avoid temperature inside rising to an extreme level. Make sure that the ventilation ducts have a lot of bends in them. Why?

Because you want to minimize the noise from escaping. As soundwaves move in a linear path and the longer the path would be the lower their intensity.

Your generator quiet box is ready for use, and if you compare it with complete units we would discuss later in this article, there is a significant difference in price and performance.

For those who are not a big fan of DIY, and want a quick solution, we have compiled a list of top generator quiet-box you can order online.

4 Best Generator Quiet Box:

We recommend picking the right size for your generator if you choose to buy any of these.

Also, you should prefer the one that is easier to assemble, large enough to accommodate your

The Zombie Box:

Zombie box is the best option for those who are looking for a generator soundbox that is designed and created mainly for a portable generator.

The Zombie Box reduces the decibel intensity of portable generators without inhibiting airflow or natural cooling properties.

It’s designed to be portable and self-supporting, so it can be assembled at any location in no time. The quiet box is also water-resistant so you can use it in rain. All materials meet NFPA and ASTM requirements. 

You won’t have to worry about waking up your neighbors with loud noises anymore, as this generator can deaden sound intensity up to 50%.

And if you need to move it around, all you have to do is pick up the box and go. You don’t need any tool for assembly – just snap them together in seconds. This will make life much easier for anyone who has a generator they need to transport or store safely away from people or animals. Also, for

Moreover, it is also suitable for other noisy tools or machines, such as air compressors and other equipment.

Microfab Generator Enclosure:

The Microfab Generator enclosures simply capture the noise you want to avoid. Whether on-site, around your home, or at a campsite, our environmentally responsible and aesthetically pleasing sound barrier can make all the difference.

The Microfab Generator Enclosure is dry and secure for outdoor use with reinforced walls. It’s also lightweight enough to be moved easily when necessary.

An included floor mat offers additional protection from dirt and oil spills while four mounting holes allow you to mount it securely to any clean surface.

A hinged door makes it easy to refuel, leaving your hands free to work on other tasks.

The side air windows allow you to keep the temperature inside to an optimal level without using a generator exhaust fan or window air conditioner.

This Generator Enclosure is available in three sizes: small, medium, and large to accommodate every type of generator.

Plastic Outdoor storage shed by outdoor Home Desing:

With the lightweight and easy setup design of the Plastic Outdoor storage shed, you will be able to easily store your generator all year round.

There is no soundproofing insulation on this item, so it might be a little less effective in dampening sound than other products on our list.

This enclosure provides excellent protection to outdoor weather conditions, keeping your generator from getting rusted or wet.

Apart from the generator, you can also use it to secure other tools and appliances.

M1™ Mini Genset Temporary enclosure:

Soundproofing your mini generator has never been easier with this portable, lightweight M1™ Mini Genset soundproofing enclosure that is great on the go.

This innovative product from Echo Barrier helps protect bystanders and equipment when unexpected loud noises occur.

The generator has a noise-absorbent composite material inside to prevent sound from leaking.

From being easy to install to a durable and lightweight design, this product will enhance any setup.

However, there is one downside, it is only made for small-sized portable generators.

Final Words on Generator quiet Box:

The generator quiet box is a great way to reduce the sound levels coming from your portable generators.

Despite the fact that building an enclosure for your generator can be time-consuming, it is worth the effort. Moreover, you would save a great sum of money. A DIY generator quiet box is more effective than prebuilt units. Another advantage would be the flexibility of design.

These enclosures are typically constructed with plywood and can be customized depending on the size of your equipment. We have discussed the process of building the generator enclosure in detail.

However, if you are not interested in building one at home, we have added a top generator soundproofing enclosure. You can have them delivered in a matter of days to fix the noise problem of your generator.

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