What Is The Underbelly Of A Mobile Home And Cost To Replace It?

What Is The Underbelly Of A Mobile Home And Cost To Replace It

The underbelly of a mobile home refers to the underside of the trailer. It is most commonly used for sewage, water lines, and electrical lines. It is the place where all of these lines will converge to enter and exit your mobile home.

Mobile Home Underbelly Replacement Cost

The cost of replacing insulation under a mobile home is difficult to determine, but it can typically be expected to cost between $.50 and $1.00 per square foot of space is insulated.

Which Factors are involved in the cost of mobile home underbelly?

  1. Insulation R-value,
  2. Amount of Underbelly Spaces,
  3. Cost of Insulation Material is the few factors that make your mobile home underbelly insulation cost more or less.

For example, if you only have one space under your mobile home to be insulated and there is no insulation currently in place, the cost of replacing it can be as low as $300.

On the other hand, if you need to insulate multiple spaces and there is already fiberglass insulation in some of those spaces, then you can expect a higher bill between $500 and $800.

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Of course, the price will vary depending on where you live and who does the work for you since this type of job typically requires special training.

Related Topic: How Much Does It Cost To Rewire A Mobile Home?

How do you replace the underbelly on a mobile home?

The process of replacing the underbelly on a mobile home is a difficult job because it requires a large amount of work to complete.

It must be done in four stages:

  1. Removing old insulation
  2. Fixing leaks and making repairs
  3. Installing new insulation
  4. Putting everything back together again.

What precautions should you take when removing the underbelly from your mobile home?

As you remove each piece of insulation or other material that may have been put under your mobile home over the years such as carpeting, linoleum flooring, tile, etc., check for any damage to the frame.

If there is none found after removing all obstructions, then no further action needs to be taken.

If you see dampness and signs of deterioration, then the frame needs to be repaired and dried out before starting any insulation job.

Typically, this will involve removing more of the underbelly materials, such as drywall or insulation, to access the frame.

Once that is completed and all repairs have been made (and dried), the process can begin again by installing new insulation over the frame and replacing all obstructions.

What is the black material under a mobile home?

This black material under a mobile home is what holds everything together, much like how concrete pours are used to support the walls of homes.

The term used for this process is “floating”, and it will keep your mobile home from sitting on the ground directly.

It also allows you to install insulation without having to worry about moisture issues due to direct contact with the ground.


The average cost to replace the underbelly of a mobile home is $1,500 – $2,000. This price can vary depending on the size and type of mobile home, as well as the materials used for the replacement.

The underbelly, or skirting, of a mobile home can be damaged by pests, animals, weather, and more. 

If you are experiencing water damage or other issues because of a faulty underbelly, be sure to get it fixed right away. Not only will this protect your home from further damage, but it can also help prevent health hazards like mold growth.

Ruby Nicholls

I am a traveling journalist and content creator, in love with the world of Mobile Homes & RVs. I spend my time filling up on new adventures, and sharing them with you so you can feel inspired to travel too! Every experience is different and at the end, we are all tourists of our own lives.

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