All About Closed Cell Spray Foam Insulation

Last Updated on June 29, 2024 by Spray Foam Insulation Plus

All About Closed Cell Spray Foam Insulation

Closed-cell spray foam insulation has a compact structure due to the closeness of cells which prevents the air and moisture from penetrating inside the foam. It provides full coverage and an airtight seal in the applied areas. It has a lower expansion rate as compared to open-cell insulation and has a high density. Compared to open-cell foam, it has a low expansion rate that has twice the R-value of open-cell foam.

The high R-value of closed-cell foam allows it to resist heat flow extremely well and helps to reduce air infiltration. This type of spray foam insulation is more cost-effective and energy-efficient which is safer to use and eco-friendly. Closed-cell insulation has many benefits which make it ideal for the insulation material. In this article, we will talk about the benefits offered by closed-cell insulation.

Energy Efficient

One of the reasons behind the success of closed-cell insulation is that it is highly efficient at insulating and cost-effective. When installed and cured it creates an air-tight seal that prevents air from entering or escaping, acting as an air sealant that fills and closes all the nooks and crannies which will reduce your energy bills. Closed-cell insulation weatherizes your home and prevents any temperature fluctuations. The result is that you can save up to 40% on your energy bills which will reduce the workload on your HVAC system and your HVAC will have less wear and tear.

Moisture Barrier

Closed-cell insulation does not allow moisture to permeate. This is because the cells are closely packed together forming a tight seal with the substrate and making the foam moisture-impermeable. Closed-cell insulation fills in all the cracks, junctions, and corners forming a seamless water-resistant membrane to eliminate leaks.

In addition to its waterproof nature, it does not promote mold growth as it is made up of synthetic materials that won’t allow the growth of mold or bacteria. This helps to improve the indoor quality of your house. If you live in humid areas with a lot of moisture, installing closed-cell insulation will be the most suitable option for you.

High R-Value

R-value is crucial to consider when it comes to choosing insulation, as it determines the thermal resistance of a material. As the R-value increases, the insulating power of a material increases proportionally. When it comes to the R-value, closed-cell insulation is hard to beat as it has an impressively high R-value of 6 per inch. It outperforms other types of insulation in terms of performance due to its high R-value. Therefore, for extreme cold places like Minnesota, closed-cell spray foam insulation is the best option.


Other types of insulation aren’t long-term solutions and they need to be replaced over a period. However, closed-cell spray foam insulation due to its powerful composition, compact nature, and rigidity — allows it to last for decades. Once it is cured, it stays in one place and doesn’t sag or deteriorate over time and it maintains its R-value. Although the initial investment for installing closed-cell insulation is large, it will save you money in the long run and you will not have to replace it after just a few years because it lasts for decades.

Safe For Your Home and The Environment

Spray foam insulation is considered green because it does not contain ozone-destroying chemicals and repels water, which prevents mold growth. This provides a safer environment in your home. It also helps to protect your home’s infrastructure and is designed to last a very long time.

If you want to invest in closed-cell spray foam insulation, contact us! Our team of professionals will help you determine the areas that need insulation to provide you with a safe and energy-efficient home.

For more information about our spray foam insulation services, feel free to contact Spray Foam Insulation Plus, the best insulation contractors, today.

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