What Kind Of Insulation For Exterior Mobile Home?


Blown fiberglass insulation is the top choice for mobile home energy efficiency experts. The construction of mobile homes, with all the tight areas, makes installing batt insulation difficult unless you are doing a complete remodel. That’s why blowing in insulation is the best choice.


Using Fiberglass to Insulate Under a Mobile Home Fiberglass is the most common insulating material. It is made of very fine strands of glass formed in rolls and loose fill batts that are installed between beams, joists, and studs. Since it is made of glass it is an excellent insulator that is affordable, non-flammable, and water resistant.

Intro to Mobile Home Insulation

Mobile Home Series: Insulating the Belly


Frequently Asked Questions

How do you insulate a mobile home?

0:519:37Mobile Home Series: Insulating the Walls - YouTubeYouTubeStart of suggested clipEnd of suggested clipAll we do here is just take our bat fiberglass. And then we wrap it over the top. And then we justMoreAll we do here is just take our bat fiberglass. And then we wrap it over the top. And then we just open our walls just a little bit on underneath.

How thick is insulation under mobile home?

Manufactured homes will have different standard insulation values as standard depending on the manufacturer and series. However, you will typically find R-11 or R-13 minimum standard in the floor, R-19 with 2″ x 6″ side walls, and R-22 in the roof.

What type of insulation is used for trailers?

Fiberglass insulationFiberglass insulation is the most common type of RV insulation that comes standard in most campers. RV fiberglass insulation has a high R-value, which is a rating of the thermal resistance of the insulation.

What is the best insulation for trailer walls?

Fiberglass insulation is the standard. It comes in most RVs right out of the factory, and for good reason. Fiberglass insulation is one of the best for maintaining temperature consistency, even in the face of extreme external weather. In other words, it's the tried-and-true method of RV insulation.

What kind of insulation does a mobile home need?

Prior to 1976, there were no building codes for mobile homes. Walls were built with 2×2 or 2×3 studs. Wall insulation was usually a 1” fiberglass batt so there is often room for additional insulation. Sometimes the wall assembly included a vapor barrier or an exterior ¼” foam sheathing.

What kind of insulation do you use in enclosed spaces?

Injection foam is generally used in enclosed spaces like walls. Some energy efficiency experts have questioned the ability of foam insulation. Testing has shown that the R-Value of foam sprayed insulation is not as good as regular batt or loose fill. It’s also a messy product and can quickly get into places you don’t want it.

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