What Are the Differences Between Open Cell and Closed Cell Spray Insulation?

Differences between open cell and closed cell spray foam insulation

What Are the Differences Between Open Cell and Closed Cell Spray Insulation?


If you’re thinking about insulating your home, you’ve probably heard of spray foam insulation. It’s a fantastic way to keep your home comfortable and energy-efficient. But what are the differences between open cell and closed cell spray insulation? They might sound similar, but they each have unique properties that make them suited for different applications. Let’s get into the details.


 What is Spray Foam Insulation?


Spray foam insulation is a type of insulation that is sprayed onto surfaces where it expands and hardens, creating a solid barrier against heat transfer and air leaks. It’s an effective way to insulate because it fills gaps and crevices that other types of insulation might miss. There are two main types: open cell and closed cell.


 Open Cell Spray Foam Insulation


1. Structure and Composition:

   – Open cell foam is less dense and has a spongy texture.

   – It consists of cells that are not completely closed, leaving tiny gaps.

   – This structure makes it softer and more flexible.


2. Expansion and Coverage:

   – Open cell foam expands significantly upon application, sometimes up to 100 times its original volume.

   – It’s great for filling large cavities and hard-to-reach areas.

   – This high expansion rate helps create an effective air barrier.


3. Insulation Value:

   – The R-value (a measure of insulation’s effectiveness) of open cell foam is typically around 1.23 to 1.4 per centimetre.

   – While it has a lower R-value compared to closed cell foam, it still provides good thermal insulation.


4. Soundproofing:

   – Open cell foam’s structure makes it excellent for soundproofing.

   – It absorbs sound waves, reducing noise transfer between rooms and from outside.


5. Moisture Permeability:

   – Open cell foam is more permeable to moisture.

   – It allows water vapour to pass through, which can be beneficial in certain applications to prevent moisture buildup.


6. Cost:

   – Generally, open cell foam is less expensive than closed cell foam.

   – It’s a cost-effective option for many residential insulation projects.


 Closed Cell Spray Foam Insulation


1. Structure and Composition:

   – Closed cell foam is much denser and has a rigid texture.

   – The cells are completely closed, packed tightly together.

   – This structure makes it more robust and less permeable to air and moisture.


2. Expansion and Coverage:

   – Closed cell foam expands less than open cell foam, about 30 to 50 times its original volume.

   – It provides a strong, dense barrier, making it ideal for structural reinforcement.


3. Insulation Value:

   – The R-value of closed cell foam is higher, typically around 2.1 to 2.45 per centimetre.

   – This higher R-value means better thermal insulation and energy efficiency.


4. Moisture Barrier:

   – Closed cell foam acts as a barrier against water and moisture.

   – It’s ideal for areas prone to flooding or high humidity.

   – It prevents water infiltration, reducing the risk of mould and mildew.


5. Structural Support:

   – Because it’s dense and rigid, closed cell foam adds structural integrity to walls and roofs.

   – It can strengthen the building structure, which is a significant advantage in construction.


6. Cost:

   – Closed cell foam is more expensive than open cell foam.

   – The higher cost is due to its density and superior insulation properties.


 Which One Should You Choose?


The choice between open cell and closed cell spray foam insulation depends on your specific needs and the area you’re insulating.


Open Cell Spray Foam:

   – Best for interior walls, attics, and other areas where you need good insulation and soundproofing.

   – Ideal for filling large gaps and cavities.

   – More budget-friendly, making it suitable for many residential projects.


Closed Cell Spray Foam:

   – Best for exterior walls, roofs, basements, and areas exposed to moisture.

   – Provides excellent thermal insulation and moisture protection.

   – Adds structural strength, making it suitable for both residential and commercial buildings.


 Practical Applications


1. Interior Walls and Ceilings:

   – Open cell foam is perfect for insulating interior walls and ceilings.

   – Its soundproofing properties reduce noise transfer between rooms.

   – It expands to fill every nook and cranny, ensuring a comprehensive seal.


2. Exterior Walls and Roofs:

   – Closed cell foam excels in exterior applications.

   – It provides a high level of insulation and acts as a moisture barrier.

   – Its rigidity adds structural strength, which is beneficial for roofs and exterior walls.


3. Attics and Crawl Spaces:

   – Open cell foam is ideal for attics and crawl spaces where it can expand and fill large areas.

   – It helps in reducing air leaks and maintaining consistent indoor temperatures.


4. Basements and Moisture-Prone Areas:

   – Closed cell foam is suitable for basements and areas prone to moisture.

   – Its moisture resistance prevents water infiltration and mould growth.

   – It enhances the structural integrity of these spaces.


 Why Choose Us for Your Insulation Needs?


Choosing the right insulation is crucial for achieving optimal energy efficiency. Our company specialises in both open cell and closed cell spray foam insulation solutions. We tailor our services to meet your specific needs, ensuring that you get the best results. Our experienced team guarantees proper application, so you get the maximum benefits in terms of energy efficiency, comfort, and durability.



Contact Us

Ready to improve your home’s energy efficiency with the right spray foam insulation? Contact us today for a free consultation and quote. Let’s work together to make your home more comfortable and energy-efficient.


For more information regarding what spray foam insulation is and what benefits it offers, get in touch with ProSpray Foam Insulation today. We provide a fast response and are happy to discuss the services you require. Make an enquiry and call (087) 6323186 or fill in our contact form today. Trust us to bring our expertise and dedication to your insulation project

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