Foam Insulation and its R-value
R-values, or resistance values, are widely used throughout the construction industry as a measure of how long an object can resist heat flow. If the R-value is higher, it means that material is more energy efficient.
Foam-in-place or sprayed foam, according to the U.S. Department of Energy, is two times as effective per inch as traditional insulation applications of cellulose or glass fiber batting. Additionally, because the R-value is calculated on air movement and the foam prevents air movement, the actual values are expected to be even higher than a rating of 6 per 1" thick versus 3 per 1” for typical conventional insulation.
According to recent studies polyurethane spray foam insulation lowers energy costs an average of twenty to forty percent, depending on building design, location, and lifestyle, location. Benefits are gained with a minimum 2" application. The colder your winter is, the higher of an R-value you will need.
Marvel Foam polyurethane sprayed foam outperforms and outlasts traditional insulation because spray foam:
- Has one of the highest R-values in the industry
- Forms a seamless barrier that entirely blocks air and moisture, thus minimizing the chances of mold and mildew forming
- Seamless application prevents leaks
- The seamless air barrier reduces more outside noise than conventional insulation
- Additional strength to roof and walls to protect against water and wind damage
- No settling
- Properly Insulates new buildings or structures
- Seals existing pipes, foundations, attic walls and ceiling, and the side of flooring you can only access through crawl spaces
- Applies easily and securely around obstruction and oddly shaped areas
Closed cell foam is the best choice for residential, commercial, and industrial construction. Marvel Foam’s reinforces and reduces structural damage resulting from natural disasters including, tornadoes, earthquakes, hurricanes, and high winds. Our foam is especially effective at providing additional protection for wood and metal frame buildings.
When Should Spray Insulation Be Installed to an Existing Building?
While spray insulation is the clear preference for new structures, but it can also help with energy efficiency in existing buildings. A professional energy savings assessment, according to the U.S. Department of Energy is the best way to determine if adding spray insulation to your existing building would be beneficial. This assessment would cover:
- What are areas in your existing structure not properly insulated?
- How well was the existing insulation installed?
- What is the thickness and R-value of the previously installed insulation?
- What type and quality of insulation are installed?
Increasing the insulation thickness will improve the products R-value and you can double the R-value with spray foam insulation by spraying it twice, doubling the thickness. However, doubling traditional insulation will not reach twice, or double, the R-value because it eliminates trapped air that the insulation relies on to perform properly. Because of the limitations of traditional insulation, the space you have available may restrict your ability to add traditional insulation. However, replacing your conventional insulation with foam, sprayed-in insulation will double your efficiency rating without requiring additional space.
How well or how skilled the installers were who installed the traditional insulation is another factor that should be analyzed. Any gaps or cracks between the insulation and the windows or studs will reduce the effective R-value. If these gaps are present, you can get a higher R-value by filling in any tiny cracks, crevices, or cavities with the spray foam insulation.