Pros and Cons of Spray Foam Insulation Board

Spray foam insulation
  • .5-10
  • Intermediate
  • 400-4,000

When evaluating different materials you can use for insulation, you should definitely consider foam insulation. Spray foam is a great way to insulate your home, and it conveys many innate advantages that most materials simply cannot compete with. However, there are a few downsides to spray foam as well, and it is important you learn about them and make sure none of them will cause you any problems. What follows should help you to understand the basics of the various pros and cons of spray foam insulation board, and how choosing it will affect your home.

1. Effectiveness of Insulation

Spray foam is an effective insulation material. It is very good at blocking heat from entering and leaving your home. This is represented in its R-value—a measurement of how much heat energy a substance can block for every unit of space it takes up—which is very high. Additionally, spray foam insulation is particularly efficient at filling up empty space, which makes it very good at preventing air and moisture from entering and leaving your home.

2. Cost of Installation

man trimming spray foam insulation around door

Unfortunately, installing spray foam in your home is noticeably more costly than other insulation options. However, it is important that you factor the effectiveness of spray foam insulation into your judgment of how expensive it is. While the setup costs of spray foam insulation are high, it can also save you money in the long term. As mentioned previously, spray foam insulation has a high R-value, which means it is exceptionally good at keeping your home cool in summer and warm in winter. In addition, it performs its job well because it is very good at plugging any gaps, holes, and cracks in your walls. Because of these features, spray foam can lower your energy bills and earn back the money it cost you, and more, in the long run.

3. Installation Process

Spray foam insulation is installed by being pumped into your walls where it expands to fill them. This can be a great advantage over other types of insulation material.

Many other types of insulation are installed in large sheets, or batts. Batts, unfortunately, must be installed as large individual pieces. While this does not present any inconvenience if you are installing them into an unfinished, uncovered wall, it can be a serious problem otherwise. If your walls are finished and insulated, and you are trying to install new insulation, you will have to tear apart the wall, install the batts, and then install new drywall and finish it. Needless to say, avoiding all of this by simply spraying in your insulation material through a small gap is a significant advantage.

Additionally, spray foam's ability to expand is also an advantage over other types of insulation. Because spray foam insulation expands when it is first installed, it naturally plugs up any holes that lead from inside your home to the outside. This prevents warm or cool air from making its way in or out, requiring you to spend energy to heat or cool it again.