Should You Choose Closed-Cell or Open-Cell Spray Foam?

Insulation spray foam is a composite material formed from combining two chemicals. After being sprayed with a special applicator, they react to create a foam solution that dries to form an air and vapour shield. Just as it is sprayed, it turns from a liquid into a solid sealant impregnable to water and air.

This spray application comes in two varieties: open and closed, which are distinguished from one another by the manner in which their respective insulation processes are carried out.

However, when DIYers go to the store to purchase spray foams, they run into a minor roadblock in the form of the following question: “Should I purchase open-cell or closed-cell?” Let’s try to make that answer simpler.

Closed-Cell Spray Foam

In terms of frequency of use, closed-cell polyurethane spray foam is well-established as the more typical option. Due to its high R-value, this structure is classified as a “closed” cell. The R-value measures how well a material blocks heat transfer. More effective insulation can be expected from materials with a higher R-value.

Closed-cell spray foams help prevent moisture buildup in insulation by providing a strong barrier against water penetration. You don’t want bacteria and mould growing inside your walls thanks to moisture buildup.

Because of its higher density, closed-cell spray foam is ideal for use as an insulator for structures and electrical equipment. It helps keep air from leaking in or out, stops mould from growing, and can even fortify a wall.

Open-Cell Spray Foam

Open-cell spray foam is, as you might guess, very similar to closed-cell foam. The only difference is that its R-value is lower. Most closed-cell spray foams will be greater than 6.0 per inch, while open-cell foams will measure in at a much more manageable 3.6 to 3.8 per inch.

Since open-cell foam will expand as soon as it is applied, this type of foam is ideal for use in areas that are difficult to access. It can be used to quickly and easily fill in nooks and crannies.

However, closed-cell spray foam is more resistant to water than open-cell spray foam is. Because of its lighter nature, this foam offers less assistance for walls, is permeable to both vapour and air, and will reduce the frequency ranges at which noise is produced.

Therefore, if you are looking for robust insulation, closed-cell spray foam is the type of foam that you should grab. But when it comes to more compact fill-ins, an open-cell foam could well serve its purpose.

What Determines The Pricing?

Spray foam insulation costs vary depending on a number of factors, the most significant of which is typically the square footage being insulated. Open-cell spray foam is less expensive overall because it requires less labour to install and uses cheaper materials.

A higher price per material is associated with closed-cell spray foam. It usually needs to be applied in several thinner coats, which can lengthen the duration of the project and shoot up the cost.

Why Should You Opt for Isothane?

DIY has its own challenges like cleaning up after a messy job. It’s also possible that choosing the proper spray foam insulation for your building will be a stressful process that could be made easier with the involvement of an experienced professional.

Since isothane spray foam products are so adaptable, they can be used for a wide range of projects, from homes to offices. Our formulations undergo rigorous evaluation to ensure they match our high standards and represent the most recent technological advances.

We are able to provide certified installers for you if you are interested in attaining the highest possible quality in both results and service. Please get in touch with us if you require any additional information.

For More Information, Visit

James Morkel

Tech website author with a passion for all things technology. Expert in various tech domains, including software, gadgets, artificial intelligence, and emerging technologies. Dedicated to simplifying complex topics and providing informative and engaging content to readers. Stay updated with the latest tech trends and industry news through their insightful articles.

Related Articles

Back to top button