The Best Ceiling Insulation for Mobile Homes

Loose-Fill Insulation

• Loose-fill insulation suitable for use as ceiling insulation in a mobile home includes fiberglass and rock wool. The product consists mainly of small particles that can conform to any space because of their loose nature. This type of insulation is inexpensive and usually made from recycled materials. It is blown into the cavity between the mobile home's ceiling and the rafters. Loose-fill insulation made from rock wool has a higher R-value than loose-fill insulation made from fiberglass. Cellulose made from recycled newsprint has the highest loose-fill insulation R-factor.

Rigid Insulation

• Rigid insulation is manufactured from expanded polystyrene or extruded polystyrene bead-board or polyurethane sheets. The sheets can be mounted against a ceiling with or without a cavity, and their R-value is particularly high. The product is also very moisture-resistant and inexpensive compared to some other kinds of insulation. It degrades in sunlight, however, so cannot be used reliably if it is exposed to the elements in any way.

Spray Foam Insulation

• Premixed polyurethane spray foam insulation is sold in a do-it-yourself kit with two dispenser units. The foam is made in open-cell and closed-cell form, with the open-cell form more flexible and easier to use. The open-cell form's R-value, however, depends on the amount of air trapped between the "broken” cells, and it is lower than the R-value of the closed-cell form. Closed-cell spray foam is expensive but reliable and rigid enough to walk on without sustaining damage; it also seals well and does not degrade inside a roof cavity. All types of spray foam are combustible, however, and may present a fire hazard.

Batt Insulation

• Batt insulation and roll insulation, also known as blanket insulation, consist of materials similar to loose-fill insulation, including recycled fiberglass and mineral wool. Manufacturers also include natural fibers such as cotton and sheep’s wool in the mix, which is pressed into pliable sheets called blankets. An inexpensive form of insulation, batt insulation compacts easily but must be installed within a cavity. Moisture causes the product to degrade; so although it is low in price, it may not be cost-effective.

Selection Process

• The best or most suitable ceiling insulation for your mobile home depends on your needs and your budget. Inexpensive insulation may degrade more easily than more expensive insulation, and insulation that is more expensive may provide better energy savings. Evaluate the risk of fire in your mobile home before choosing a combustible product. The temperature in your region will help you determine whether heavy or light insulation is best. Check whether or not your mobile home has a ceiling cavity in which to install the product you choose.