The Pros and Cons of Rigid Foam Board Insulation

August 22, 2022

Rigid foam insulation has become a common insulation material that homeowners have been using for many years. Most property owners highly favor rigid foam insulation because it offers some major benefits. 

What Are the Pros of Rigid Foam Insulation?

1. Prevents Air Leaks

One of the most important things that insulation does is prevent air leaks. Filling in all the cracks and crevices around your home creates an impenetrable barrier against outside air, keeping your home much more comfortable year-round.

Rigid foam insulation is especially good at this because it can be easily cut to fit snugly around any irregular-shaped openings, unlike fiberglass batting which can leave gaps and holes.

2. Controls Moisture

It is common knowledge that moisture and wood are not a good mix. Not only can moisture cause wood rot, but it can also lead to mold and mildew growth, which can be a serious health hazard.

Rigid foam insulation helps to prevent moisture problems by creating a vapor barrier that stops moisture from entering your home in the first place. This is especially important in homes built on slab foundations, where moisture can be a real problem.

3. Reduces Noise

Another advantage of rigid foam insulation is that it can help reduce noise levels inside and outside your home. By absorbing sound waves, it can make a big difference in the overall noise level in your home, making it much more peaceful and relaxing.

What Are the Disadvantages of Rigid Foam Insulation?

Not Fire Resistant

One of the downsides of rigid foam insulation is that it is not fire-resistant. While this may not be a big deal if you live in an area with a low risk of wildfires, it’s something to keep in mind if you live in a more fire-prone area. In addition, because rigid foam is made from petroleum products, it can give off toxic fumes when it burns, which can be a serious health hazard.

Difficult to Install

Another downside of rigid foam insulation is that it can be difficult to install, especially if you’re doing it yourself. Unlike fiberglass batting, which can be easily cut and fit into place, rigid foam boards need to be carefully measured and cut to fit, which can be a time-consuming and frustrating process.

Expensive Insulation

Rigid foam insulation has proven to be an excellent insulator, but it is also one of the more expensive insulation options on the market. The rigid foam may not be the best option for you if you’re on a tight budget. Homeowners don’t need to use something that is beyond their budget.


Despite its disadvantages, rigid foam insulation is still a good choice for many homeowners because of its many benefits. Therefore, if you’re considering adding insulation to your home, the rigid foam should be on your list of options. Contact Ace Insulation Inc. for a free quote.

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