Skip to main content

How to Build a Generator Enclosure

How to Build a Quiet Shed

Generator Enclosure

Generator Enclosure

Generator Shed

Generator Shed

How to Build a Shed

How to Build a Shed

How to Build a Generator Enclosure

If you have ever been camping or in a rural area where generators are common you know how disturbing the loud sound a generator makes can be. Some 'tough guys' think it's OK and almost thrive on the complaints and ensuing conflicts that come from disturbing the peace but fortunately the majority of people would really rather be 'good citizens' and contribute to the quiet, peaceful surroundings being in the country is all about.

So, if you're in that position where you need a power generator either some of the time or even occasionally but don't want to spend a lot of money on a commercially built generator enclosure there is a simple and cheap solution. Learn how to build a shed that will quiet your noisy generator. Here's how to do it and below you'll find a helpful video which walks you through it step by step.

Step 1 - Purchase two 4x8 sheets of insulating board a.k.a. regular styrofoam sheeting. You can find it at most lumber stores including Home Depot. Purchase the type that has reflective foil covering. Also, find or purchase a 4x4 piece of plywood.

Step 2 - Get some boxing tape or duct tape - really that's all you will need to buiold a shed for your generator. Also, a couple of cans of spray glue which you will use to top coat and weatherproof the tape and seams.

Step 3 - Measure your generator and then cut the sheets of foam to allow for plenty of clearance all round the generator. You will need at least 10 inches of clearance all round. Also, cut one end of the box 4 inches shorter than the other three sides. This will allow air to escape under the bottom to keep your generator cool.

Step 4 - Cut a circular hole in one end of the box to hold a cooling fan. The size and shape of the hole will depend on the fan you purchase. You want to get a good air flow so use an eight to ten inch fan.

Step 5 - Now line your box completely with regular fiberglass insulation. If you want to spend a bit more and get an even quieter result look for the 'safe n sound' insulation which is specially made for noise reducing applications.

Step 6 - Fix your fan to a box so it aligns with the whole you have created in the end of your enclosure.

Step 7 - Attach a flexible piece of exhaust tubing/pipe to your generator muffler with a muffler clamp. Attach the other end to an old car muffer. You can pick one of those up at your local dump or wreckers cheap or even for free.

Step 8 - Place your box over top of your generator and lead the pipe outside for exhaust.

That is a cheap and quick way to make your generator much quieter. See the video below for a walk through demonstration of how to build it and how it works.

For more information on How to Build a Generator and how to build a shed to keep it quiet checkout

How to quiet a portable electric generator on a budget

Quiet Generator

Here's a cool idea - a new portable solar powered generator for applications where there is no electricity available. These advancements are bringing Green Construction to the planet and are so much better than noisy polluting gas or diesel generators! Note though the technology still has a little way to go as the power output may not be high enough for a big crew or heavy duty equipment.

Quiet Solar Generator

How to Build a Shed

Below is a cool speedy video showing How to Build a Shed. This may not exactly be a generator shed but you can apply this technique to make your enclosure smaller or bigger depending on your needs. Of course to house a generator and make it quite you will need to add quality insulation everywhere and don't forget to use exhaust tubing to make sure all of your engine fumes exit the structure. Attach an old car exhaust muffler on the outside to minimize external noise. Also, be sure to add a fresh vent with fan to bring fresh air into the shed for proper ventialtion and to keep your genny operating at peak efficiency.

How to Build a Shed

Scroll to Continue


RTalloni on July 16, 2019:

Looking forward to showing my husband this project. We live in an area that periodically creates a need to use the generator but dragging it out of storage makes a bad situation worse. Having its own storage unit is the answer and reducing noise is a capital bonus!

martellawintek on December 01, 2012:

well trevor sorry mate i`v took so long here is there contact

and some info ,check out there great prices, mention martells said you would get him sorted

sistaelle on March 28, 2012:

Dang- i wanted to see how they were going to move the shed!

Brian on February 19, 2012:

I use my generator for power outages during which most of my neighbors pack up and go somewhere that has power. Normally I don't worry about the noise but this is great for running the generator during a storm and keeping it dry.

Harrison on November 09, 2011:

A great place for generator enclosures and generator shed plans is

Christopher on November 09, 2011:

I contacted the guys at and they added plans for a generator enclosure. Check it out at

Christopher on September 16, 2011:

That is the coolest little shed I have ever seen (the little one with the lift top lid. There are some plans at I am going to see if they will draw up some generator sheds. What a great idea.

Thanks for the post.

Caverson from Left Coast on October 28, 2010:

That vid with the guys building the shed was awesome. now if I could just get them to work for me by the hour...

PartyPlannerDeb on August 25, 2010:

Good idea Paul. We have a generator up at the cottage for those times when the power goes down. I hate running it as it really does 'pollute' the nature I'm there to enjoy. To be honest the video looks like a pretty amateur hack job but I'm going to get my hubby to read this so he can get his engineering mind to work on a more effective design.

PAMark from Victoria, BC Canada & Boquete, Panama on August 24, 2010:

Good stuff Paul - we need info like this. Going green means many things and I believe noise pollution is just as damaging to our environment as any other kind.

Carey Nexust on August 24, 2010:

Man, I'm going to print this off and give it the guy who always camps beside me up at the lake. Unfortunately he's about six six and looks like a giant otherwise I'd take a sledge to his generator. You're so right about most people unfortunately I'm stuck with the noisy minority!

Related Articles