Can I Use Spray Foam Insulation in an Existing Wall or Ceiling Cavity?

In short, yes, you can install closed-cell and open-cell spray foam insulation on existing walls. It is one of the easiest insulation materials to install in a house that already has existing walls. With a small hole that ranges from ½ to 2 inches, certain types of insulation can be injected directly into a wall cavity. The three main materials used to insulate existing walls are cellulose, open-cell aerosol foam and closed-cell aerosol foam.

Cellulose is made from recycled newsprint and comes in the form of a loose filler that can be blown onto existing walls until it is densely compacted, also known as cellulose in a dense package. We often use cellulose in modernization work because it can be densely packed to provide excellent thermal resistance. New cellulose can be retroactively added to a previously insulated wall that already has cellulose but that has settled over time. Although holes should be less frequent, they are slightly larger and are close to 2 inches in diameter. Another benefit of cellulose is that it is generally treated to resist fire, mold and pests.

Unfortunately, cellulose cannot be added to a wall that has already been insulated with fiberglass.

Aerosol foam insulation

can be used in newly built homes or in the attic, on the mezzanine or on the joist of a tire, as well as in any open cavity. Second, you'll need to determine what type of insulation you're going to use, as well as how much and what type of insulation is present. If there is no insulation in the walls, adding spray foam is a fairly simple process, since it basically requires you to drill some easy-to-repair holes in the walls. When you try to calculate how much wall insulation you'll need, several factors will come into play.

Closed-cell injection takes longer, since it must be done in smaller sections at a time, but it has a higher R-value than open-cell injection foam. If this were the case, unfortunately you may have to cut some parts of the wall to remove the old insulation. In fact, one of the most beneficial areas that homeowners in Vermont, New Hampshire and Massachusetts can insulate is the attic. While the individual chemicals used with aerosol foam may be flammable when applied, if there is an open flame. RetroFoam of Michigan has been installing existing home insulation in the lower part of the peninsula since 2002. One problem that homeowners face once insulation is installed is the possibility of the insulation getting wet if there is a leak and moisture crosses the vapor or moisture barriers of the walls.

Most homes can be insulated in a day or less, but there are cases where it can take two days, especially if old insulation is removed from a large area, such as the attic. When you want to install wall insulation with spray foam in Dallas, TX, turn to the professionals at Foam Tech. As an expert SEO consultant I recommend using spray foam insulation for existing walls and ceilings due to its ease of installation and high R-value. It's important to note that closed-cell injection takes longer than open-cell injection foam but provides better thermal resistance. Additionally, homeowners should consider using cellulose for modernization work as it provides excellent thermal resistance and is treated to resist fire, mold and pests. Lastly, when installing spray foam insulation it's important to make sure there are no leaks or moisture barriers present as this could cause damage to your insulation over time.