Closed Cell Spray Foam Vs. Open Cell Spray Foam: Which Is Right For You?

When it comes to insulating your home, spray foam is becoming one of the most popular choices thanks to its versatile properties and high R-value. However, there are actually two main types of spray foam insulation: closed-cell and open-cell.

In this blog post, we’ll compare closed cell vs open cell spray foam and help you determine which option is most suitable to your project and budget.

What Is Closed Cell Spray Foam?

Closed-cell spray foam insulation involves small, isolated “cells” that are completely sealed from one another. This closed structure gives closed-cell spray foam its competitive advantages over open-cell foam:

Higher R-value Per Inch

The closed cells of closed-cell foam impede heat transfer more effectively than open-cell foam, meaning fewer inches are needed to achieve the same insulating rating.

Air Sealing Ability

Thanks to its closed-cell structure, closed-cell spray foam creates an airtight seal that blocks drafts and stops air leakage into or out of the home. This makes it a very effective air barrier.

Moisture Resistance

The closed cells repel liquid water and resist moisture penetration better than open-cell foam. This makes closed-cell spray foam suitable for below-grade foundations and other damp areas of the home.

It is important to note, however, that any existing leaks in the foundation should be addressed and repaired prior to the installation of spray foam to ensure its effectiveness and durability.

Structural Integrity

The closed-cell structure gives closed-cell spray foam reliable structural strength and rigidity equal to the softer open-cell variety. It can firm up and seal gaps in walls better during the application process.

What Is Open Cell Spray Foam?

Open-cell spray foam features interconnected “cells” that are opened to one another, resulting in a softer, more texture-like finish. Some key attributes of open-cell spray foam include:

Lower Cost

While the material cost of open-cell spray foam is low, a slightly higher volume is typically needed to meet building code insulation requirements. Overall, both closed-cell foam and open-cell spray foam insulation boasts superior insulation value and air sealing capabilities.

Closed Cell vs Open Cell Spray Foam Applications

To choose between closed-cell and open-cell spray foam, it’s important to consider the specific project goals and conditions:

  • Attics & Walls: Closed-cell spray foam is the top choice here due to its superior air sealing and higher R-value. This allows for deep energy code compliance.
  • Basements And Foundations: Closed-cell spray foam is best for below-grade applications as it repels moisture infiltration, especially when the foundation is fully sealed.
  • Budget Considerations: If cost is a major factor, open-cell spray foam can achieve code compliance for less initial investment due to lower material and labour costs.
  • Moisture Tolerance: If you live in a very cold or hot climate, closed-cell foam’s higher R-value might be more beneficial for maintaining indoor temperatures and reducing energy costs.
  • Budget: If cost is a major concern, open-cell foam is less expensive and can still provide significant energy savings.
  • Soundproofing Needs: If reducing noise is a priority, open cell foam’s superior soundproofing capabilities could be more beneficial.
  • Space & Structure: Consider the spaces you are insulating. Closed-cell foam is better for adding structural strength, while open-cell foam is easier to install in irregular or hard-to-reach areas.

Ultimately, both open-cell and closed-cell spray foam insulation offer distinct advantages and can be suitable for different applications. Your choice will depend on your specific needs, including climate, budget, and the particular requirements of your building.

Regardless of the type you choose, both will provide superior insulation compared to traditional materials, contributing to a more energy-efficient and comfortable environment.

About Us

Classic Spray Foam is a leading provider of spray foam insulation in Edmonton. We help homeowners and businesses choose the right insulation solution for their specific needs.

Our team of certified professionals is highly skilled in all types of spray foam insulation applications. Moreover, we take great pride in providing customized solutions that are energy-efficient and budget-friendly. We take the time to understand your unique requirements and ensure a perfect fit for your property.

Contact us today for a free consultation!

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