Patented, foamed-in-place polyurethane core
Wayne-Dalton's Foamed-In Place Insulation
The core of our popular, polyurethane insulated garage doors provides excellent insulating qualities. In fact, polyurethane insulation provides more than twice the insulating value of common polystyrene insulation board of the same thickness. It's chemically bonded to each steel section, creating a composite structure with higher strength, greater rigidity, improved dent-resistance and better thermal protection.
To understand how R-value and heat flow are related, think of your garage not as a single entity but as a part of a system with the external environment. As with most everything in nature, heat will want to redistribute itself in an effort to reach a state of equilibrium, or equal temperatures, on the inside and the outside of your garage. To do this, heat must pass through the garage door to reach the other part of the system.
Door insulation quality impacts your utility bills because your garage door is typically the largest opening in your home. Many people also like to spend time in their garages working or even entertaining guests. For those reasons, a well insulated garage door is important even if the garage is not connected to the house.
In the summer, it is naturally hotter outside of your garage than inside most of the time and heat will try to "get in" to even out the system. If a garage door has an R-value of 3, 1/3 of the heat will get through the door and into your garage. This does not mean though that the internal temperature will be 1/3 of the external temperature. It just means that as more heat is produced externally, 1/3 of it will enter your garage. Insulating your garage door can help keep the heat out.
The opposite is true in winter. Heat is produced inside your garage in winter, either by direct heating, connection to your house, or by effects of the sun. As it is cooler on the outside of the door, heat will try to escape through the door to even out the system. If keeping your garage warm in winter is a priority, or even to just lessen the overall effects of cold temperatures, then choose a door with a higher R-value.
Two Types of Insulation
Polyurethane foamed-in-place insulation
Our most popular polyurethane foamed-in-place insulated doors have R-values ranging from 14.8 to 7.6. The doors are manufactured with polyurethane foamed-in-place insulation using a patented process. Polyurethane insulation delivers the highest insulation values while adding strength and rigidity to the door panels. It even helps dampen sound transmission, keeping the noise out or in, depending on the activity.
Below are Wayne-Dalton residential door models using polyurethane insulation and their accompanying R-values:
Doors with this symbol are eligible for the Energy Savings Tax Credit if purchased and installed in 2009 and 2010. Click the symbol for the Certificate, which can be used to receive your tax credit.
Expanded polystyrene insulation
Polystyrene insulation is formed into rigid panels that are placed inside the door sections and secured in place with a metal backer.
Below are Wayne-Dalton residential door models using polystyrene insulation and their accompanying R-values:
* R-Values are in accordance with DASMA TDS-163.
