Build your own Portable Generator Enclosure

Now, we already to build our portable generator enclosure. Before you read this article, you should read “Before build your own Poratble Generator Enclosure” first because it’s suggestion which help you to decision toBuild build your own portable generator enclosure. It’s have many benefits for build portable generator enclosure like save money, customization is up to you, handcraft skill up, choose material which you want and many more. But to build your own portable generator enclosure has a disadvantages like if you don’t have skill, your enclosure may collapse or not strength. For build portable generator enclosure you must have more skill to build the best enclosure for your portable generator.

I have 2 ways to build your portable generator enclosure.



  1. Purchase two 4×8 sheets of insulating board a.k.a. regular styrofoam sheeting. You can get it at most lumber stores including Home Depot. Purchase the type which has reflective foil covering. Also, find or purchase a 4×4 piece of plywood.
  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 weather proof the tape and seams.
  3. Measure your generator and then cut the sheets of foam to allow for plenty of clearance all round the generator. You’ll 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.
  4. Cut a circular hole in one end of the box to keep a cooling fan. The size and shape of the hole will depend on the fan you purchase. You want to get a good ventilation so use an 8 to 10 inch fan.
  5. Now line your box completely with regular fiberglass insulation. If you need 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.
  6. Fix your fan to a box so it aligns with the whole you’ve created in the end of your portable generator enclosure.
  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.
  8. Place your box over top of your generator and lead the pipe outside for exhaust.



  1. Shovel a hole about 1 foot deep, and 1/2 foot larger than the portable generator enclosure.
  2. Lay down some construction plastic to waterproof the base.
  3. Fill the hole with 10 or 11 bags of rubber mulch, or tires which have been cut up.
  4. Place flat cement blocks on top of the bags of mulch. The solid cement blocks should really be about 7 1/2 inches by 15 inches long, and 3 or 4 inches thick. Lay them side by side to make a floating deck.
  5. Place a fiber board on top of the cement to give it stable platform. The generator will be placed on top so it needs to be stable.
  6. Lineup cement blocks in two rows of five on either side and on the back of the generator.
  7. Fill in the cracks of the cement block with foam to insulate the enclosure.
  8. Measure and cut three strips of plywood to go over the cement blocks. You can glue foam to the plywood to add insulation.
  9. Line three strips of plywood on both sides and the back. Nail them together with a hammer.

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