How To Insulate Mobile Home Walls And Windows

A mobile home is an affordable housing option that can be manufactured quickly, so it is more accessible than traditional homes. However, you may have questions about how to insulate a mobile home's walls and windows. We did the research to provide you with an answer.

When it comes to insulating a mobile home, the best choices are fiberglass or spray foam insulation. You can also use less expensive options like rockwool panels if you wish to install insulation yourself. Overall, fiberglass or open-cell spray foam insulation are the best choices for a mobile home because of their longevity and resistance to moisture, mold, and fire.

In this post, we'll talk about insulation for mobile homes that reduces energy costs, supports a comfortable indoor climate, and creates an enjoyable abode. Read on to discover the advantages that various types of insulation provide for a more energy-optimized mobile home.

A beautiful small white home, How To Insulate Mobile Home Walls And Windows

Mobile Home Insulation

Older mobile homes often lack sufficient insulation when compared to more modern mobile homes that are held up to higher standards. However, you can improve your mobile home by adding insulation with a high enough R-value.

Depending on the layout of your home, geographical location, and budget, you can find the right type of insulation to guard against heat loss in cold, improve cooling in the summer, and keep the interior climate comfortable.

Holiday caravan or mobile home

Without proper insulation, a home is more susceptible to developing problems with condensation, mold, mildew, structural damage, and may even have issues with pests. You can choose to DIY insulation or hire a professional.

Types Of Insulation Explained

The following types of insulation are recommended for installation in mobile home walls and windows.


Fiberglass insulation roll

Fiberglass is a popular insulation material. It is prized for residential and commercial purposes because it is fire retardant and can last up to 100 years. However, any damage will require replacement, usually within 15 to 20 years.

Fiberglass insulation is available in the form of rolls, batting, board, or even a blown-in option. The most common form of this insulation is a roll or batting, with boards being less common. Overall, it is a popular choice for DIY.

Check out this insulation on Amazon.

Spray Foam

If you have small areas to cover or odd narrow spaces, consider choosing a low-density, medium-density, or high-density spray foam. In most instances, it is best for a professional come in with the right tools to install this product.

Spray foam is a desirable form of insulation because it holds its shape well over time and does an excellent job at filling in crevices, cracks, and improving energy efficiency. It is a top choice for insulating windows and doors to seal out cold.

Check out this insulation for tight spaces on Amazon.


One of the most common forms of insulation is available in a roll or batting, which makes it easy to cut to size and stuff into areas or nail into place. There is blanket-style insulation made from fiberglass, mineral wool, and natural fibers.

Blanket insulation is usually very cost effective, budget friendly, and the easiest to install without professional help.

Check out this reflective blanket style insulation on Amazon.


Builder installing insulating board into roof of house

If you are looking for a rigid form of insulation for your home's walls, consider a board type made from polyurethane, fiberglass, or mineral wool. Board insulation is easy to cut into size and adhere in place, and it resists moisture.

Note the thermal or R-value for board insulation is pretty good compared to roll or batting style.

Check out this mineral wool insulation board on Amazon.

Loose Blown In

Fill in cavities between walls and create a blanket of insulation with loose blown-in style material. Most loose insulation is made from cellulose or other materials and is either open cell or closed cell.

The performance and R-value of most loose blown-in insulation slightly outperforms similar R-level batting insulation. One drawback to using this product is that the cost for installation is a bit more expensive than other options.

How To Install Insulation

For most types of insulation, it is better to hire a professional. Trusting a certified expert for the installation ensures your mobile home is properly protected from extreme fluctuations in temperature, precipitation, and damaging elements.

When installing insulation on your own, don't cut corners and enlist help. Poorly installed insulation could easily degrade or lose performance, or you may not have a sufficient amount used for your walls and windows.

Familiarize yourself with panel or board insulation which is attached to walls, or stuff in roll or batting style insulation where needed. Take safety precautions, and follow manufacturer instructions to protect your health and home.

How Well Are Mobile Homes Insulated?

To cut costs and due to being manufactured fairly quickly, most mobile homes are not insulated as well as homes built on site. Only in recent years has HUD increased the requirements for insulation in homes.

However, do your part to increase the insulation of your walls and flooring, and install energy-efficient windows and doors. Based on where a mobile home is manufactured, the R-value for its insulation varies.

Can You Use Spray Foam Insulation In A Mobile Home?

Since spray foam is considered a high-performing insulation that may even best fiberglass, it's a great option for a mobile home. Look to install spray foam insulation under the floors, between wall cavities, and the skirting.

To prevent spray foam from triggering any allergies or health problems, consider hiring a professional for installation rather than resorting to DIY for large areas of the mobile home. For smaller areas, DIY should be fine.

Open-cell foam is the most desirable option for nearly all areas of a mobile home. For the underside of a mobile home, it may be better to use a closed-cell spray foam to keep floors warmer, reducing energy costs and inefficiency.

Check out this spray foam insulation kit on Amazon.

How Can You Make A Mobile Home More Energy Efficient?

To reduce costs, manufactured mobile homes often lack sufficient insulation and are not designed to be energy efficient. However, you can take steps to improve a mobile home's energy efficiency with a few simple moves.

Add adequate, high-quality insulation to your home's walls and windows, and install a belly wrap. Make an effort to install energy-efficient windows, doors, and caulk and seal out any areas where drafts exist. Don't leave any areas untreated.

Ensure that there is enough insulation at the right R-value for your zone to improve performance of the roof, walls, windows, and flooring to increase energy efficiency. Take your time when installing to ensure the home is well padded.

Keep up with your home's maintenance every 10 to 15 years by inspecting your insulation for any signs of damage, moisture, or loss of performance. Leaks, mold, mildew, and crumbling insulation can negatively impact the energy efficiency of your mobile home.

How Do You Weatherproof A Mobile Home Window?

Bubble wrap packaging attached to windows together as insulation for winter

Upon closer inspection of your mobile home windows, you may notice gaps, cracks, and spaces where drafts can come through. You can weatherproof windows by adding a layer of weatherstripping or adding a line of caulk to close any gaps.

Because mobile homes are manufactured, they often have a space between the siding and the window where heat is lost or cold air comes in. Making an effort to weatherproof your windows helps reduce energy bills and increase comfort.

Also, depending on the type of mobile home you have and where it was manufactured, the U-factor for windows and R-value for insulation used will vary, impacting your comfort levels inside.

Don't forget to winterize your mobile home windows when the temperatures plummet. Make sure that vents, heaters, and plumbing are all in working order. Consider using plastic sheeting or bubble wrap over your windows to trap heat.

Check out this weatherstripping for windows and doors on Amazon.

In Closing

We hope after reading this article you feel more confident about insulating a mobile home so it is more comfortable and energy efficient. Installing quality insulation with the right R-value reduces energy costs and increases comfort.

Take steps to improve your mobile home's overall energy performance. Keep in mind that older mobile homes tend to have less insulation than homes built on site. Seal out leaks, install efficient windows and doors, and upgrade insulation.

Before you go, don't miss reading the following helpful articles:

Does Spray Foam Insulation Cause Moisture Problems?

How Long Does Fiberglass Insulation Last?

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