Debunking 3 Common Myths About Spray Foam Insulation

Posted on: 27 July 2022


Spray foam is a trusted solution for residential insulation that has been the standard for decades. Despite this, a few myths about spray foam insulation are still prevalent. This guide will debunk three common myths about spray foam insulation to help you make an informed decision for your home.

Myth 1: All Spray Foam Insulation Is the Same

Spray foam insulation may seem like a simple concept, but you still have several choices to make when insulating your home. Polyurethane resin is the primary ingredient in almost all spray foam, but formulations and application methods differ between manufacturers. For example, some manufacturers are switching to an alternative blowing agent that has a significantly lower environmental impact.

You must also choose between open-cell and closed-cell spray foam. Open-cell insulation has a higher expansion ratio, making it ideal for wide spaces in walls and attics. Closed-cell insulation is rigid and water-resistant, so it's a good choice for basements and other moisture-prone areas.

Myth 2: Spray Foam Insulation Can Ruin Shingles

Spray foam insulation is a popular choice for attics and roof decks because it provides easy installation in these areas. One fear that sometimes arises is that spray foam insulation below the roof deck can damage shingles on the roof. The most common concern is that the insulation will trap the sun's heat in the sublayers of a roof, causing shingles to peel and curl.

Spray foam has a much larger impact on the temperature inside your home than the temperature of your shingles. While insulation or other radiant barriers in the attic can raise the temperature of shingles by a few degrees, the effect is far from enough to damage them.

Myth 3: Spray Foam May Shrink and Reveal Gaps

Homeowners are sometimes concerned that their spray foam insulation could shrink due to temperature, moisture, or other unfavorable environmental circumstances. This issue could potentially create gaps around the insulation and neutralize its insulative properties.

The good news is that shrinking isn't a problem when spray foam insulation is properly mixed and installed. If you leave spray foam installation to an experienced professional, you'll have peace of mind that your insulation will perform well over its entire lifespan.

Insulation is one of the many parts of residential construction where it pays to be an educated consumer. Don't let these myths discourage you from enjoying the benefits of spray foam insulation in your home.

Contact a company like Comfort Zone Foam Insulation to learn more.