Spray foam insulation has become increasingly popular in recent years as an effective way to keep homes well insulated. While it offers numerous benefits, it also has some downsides. Let’s explore the pros and cons of spray foam insulation, discuss the best uses for it, and explore the worst situations for using spray foam insulation in a home and the best alternatives for those situations. We'll also take a look at the cost of spray foam insulation and compare it to similar products on the market.

Pros of Spray Foam Insulation

1. High R-Value: Spray foam insulation has a higher R-value than most other types of insulation which means it can provide better insulation per inch of thickness. This can help save on heating and cooling costs.

2. Air Sealing: Spray foam insulation is excellent at air sealing. It can help to eliminate drafts which can further reduce energy costs.

3. Moisture Barrier: Spray foam insulation can also act as a moisture barrier preventing water from seeping into your home and causing damage.

4. Mold Prevention: Spray foam insulation is also resistant to mold which can be a significant concern in areas with high humidity or where moisture can accumulate.

5. Long-Lasting: Spray foam insulation is durable and long-lasting, so you won't need to replace it as often as other types of insulation.

Cons of Spray Foam Insulation

1. Cost: Spray foam insulation is more expensive than other types of insulation. While it can save money on heating and cooling costs in the long run, the upfront cost can be a significant barrier for some homeowners.

2. Installation: Spray foam insulation requires professional installation which can be expensive and time-consuming. Improper installation can also lead to problems with the insulation down the line. If you’re applying a small amount of spray foam insulation from a can, you don’t have to hire a professional. Call in the pros when you want to insulate more than just seals around doors and windows.

3. Health Concerns: While spray foam insulation is generally safe, it can cause respiratory issues if not installed correctly. Do not inhale fumes from spray foam insulation.

Best Uses for Spray Foam Insulation

Spray foam insulation is best used in areas where a tight seal is required such as attics and crawl spaces. It can also be useful in sealing around doors and windows. I once had a gap between my garage door and the trim board around it. I began noticing pests entering my garage through the gap. Shortly after a regular pest control appointment, I applied a small amount of spray foam insulation to keep bugs out. And my garage was a little better insulated for my trouble.

Worst Situations for Using Spray Foam Insulation in a Home

While spray foam insulation can be beneficial in many situations, it's not always the best choice. It's not recommended for use in areas where moisture is a concern such as basements or areas with high humidity. It's also not recommended for use in areas where there is a risk of damage such as areas prone to flooding or areas where rodents and insects may be present.

Cost of Spray Foam Insulation

The cost of spray foam insulation varies depending on the size of the area being insulated and the type of foam used. On average, homeowners can expect to pay between $1.50 and $3.50 per square foot of insulation. This can be more expensive than other types of insulation, such as fiberglass or cellulose, which typically cost between $0.50 and $1.50 per square foot.

If you only need to fill some gaps, each can of spray foam runs between $6.00 and $9.00. When sealing one window or door, a single can is usually enough. But you can always buy more and return the unused cans to the store where you purchased them.

Spray Foam Insulation Products

Try these products for your next spray foam insulation project.

DIY Spray Foam Kits

1. Touch 'n Seal 600 Kit - This two-component spray foam kit can cover up to 600 square feet of surface area and is perfect for small projects or touch-ups. If you’re unsure about doing this work yourself, call a professional.

2. Dow Froth Pak 650 Kit - This kit is designed for larger projects, covering up to 650 square feet of surface area.

3. Touch 'n Seal 200 Kit - This kit can cover up to 200 square feet of surface area and can be used for a variety of projects including insulation, air sealing, and soundproofing.

Spray Foam Sealants

1. Loctite Tite Foam Gaps & Cracks Spray Foam Sealant - Fill up to one-inch gaps between a variety of surfaces including wood, concrete, brick, stone, metal, and PVC.

2. Loctite Tite Foam Big Gaps Spray Foam Sealant - This sealant fills gaps up to three inches wide and bonds to most common construction surfaces.

3. Red Devil 0913 Foam & Fill Small Gaps & Cracks - Tackle small gaps and cracks with ease. Sand and paint to give your home a finished look.

Conclusion

Spray foam insulation offers numerous benefits, including high R-value, air sealing, moisture protection, mold prevention, and durability. However, it also has some downsides, including cost, professional installation requirements, and potential health concerns. The best uses for spray foam insulation are in areas where air sealing is necessary, such as attics and crawl spaces, and in areas with extreme temperatures. It is not recommended for use in areas with moisture concerns or risk of damage. Homeowners should weigh the cost of spray foam insulation against its benefits and the unique needs of their home before making a decision.

—

Note: This blog post contains affiliate links. See Affiliate Disclosure for more details.