Most homeowners today are familiar with spray foam insulation. The product is becoming the standard for home insulation, replacing the fiberglass batting that was used for decades. Despite its increasing popularity, though, most people aren't familiar with the origins of the material, and why it's so effective for maintaining interior comfort. 

An Overview of the Development of Spray Foam Insulation

spray foam insulation

What we know as spray foam insulation is a mixture of resin and isocyanate that creates a polyurethane polymer. During the 1930s and 1940s, this polymer was developed for the U.S. military for use in airplanes. However, it wasn't until after World War II, when the need for aviation insulation declined, that the manufacturers began to look at other applications for the product. 

During the 1950s, the Blendometer was invented by Walter Braughman, paving the way for the polyurethane polymer to be used in home insulation. The Blendometer mixed the resin and isocyanate to create the rapidly expanding, insulating foam when sprayed. Still, the foam was mostly used for air conditioning insulation and only started seeing widespread use for home insulation in the 1970s, when the energy crisis increased demand for better insulation.

During the 1960s and 1970s, the mixing process was refined and the technology for implementing spray foam insulation advanced. Today, most installers use a system that automatically combines the components and delivers them via a high-pressure spray that quickly expands and hardens. 

The Benefits of Spray Foam Insulation 

Today's spray foam is classified into two types: open and closed cells. The tiny cells of open-cell foam are not completely closed, giving it a more sponge-like texture. This foam offers excellent soundproofing but doesn't offer a water barrier, so it's mostly used on interior walls. Closed-cell foam offers protection against both air and water vapors, so it's typically used for roofing and exterior walls.

Compared to other types of insulation, spray foam insulation is excellent for blocking drafts and water. It fills in cracks and crevices completely instead of just covering them. This also helps it block out dust and allergens, as well as insects and pests that can enter through even the smallest opening. 

Spray foam also lasts longer than other types of insulation, as it's less likely to sag or bunch up than fiberglass. It's also impervious to water, which helps prevent mold and mildew. The density and hardness of the foam can also help improve the structural strength of your walls and room, as it holds everything together and adds another layer of protection against the elements. 


If you want to upgrade your home's insulation, turn to Advanced Seal LLC in Rossville, IN. These licensed contractors have more than four decades of experience working with local homeowners and businesses, and will install spray foam insulation to reduce your heating and cooling costs. Their knowledgeable technicians will work with you to develop a plan that fits your timeline and budget. Call (866) 236-2648 for a consultation, or visit the website to learn more.