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​Garage Door Insulation

garage door The primary entrance to a home is usually through the garage.  With living space often above or beside it, it’s best to keep the temperature in the garage as controlled as possible. An insulated garage door along with insulated garage walls can significantly control the temperature of your garage space.  The amount of insulation you need in your garage door depends on your region.  For example, colder climates call for garage doors that are effective at keeping the temperature bearable in the garage. The effectiveness of the insulation is expressed as an R-value*, which is a measure of thermal resistance to heat flow. The higher the R-value, the better the insulation in the door. Classic Steel Model 8500 has the highest level of insulation for our residential doors with an R-value* of 16.22.

The same properties that improve thermal efficiency, also give polyurethane insulation excellent acoustic properties. An insulated garage door can significantly reduce the intrusion of street noise into the home – especially important when there are bedroom or other living areas above or adjacent to the garage.

The type of insulation in your garage door can also make a difference. Many Wayne Dalton garage doors come with one of two types of insulation: polyurethane or polystyrene. Polystyrene insulation is usually used in rigid sheets inserted into garage door cavities. Polyurethane is a foam that expands and bonds to surfaces when injected into the cavity. Inch for inch, polyurethane insulation is twice as effective as polystyrene.

Insulated Garage Door Benefits

  • Prevents air leakage
  • Creates a comfortable environment to work in the garage year-round.
  • Better resistance to dents
  • Reduces street noise from entering the home
  • Thermal efficiency - especially when the walls of the garage are also insulated

Polyurethane foamed-in-place insulation

garage door insulationOur most popular polyurethane-insulated doors have R-values* ranging from 9 to 16.22. These doors are manufactured with polyurethane foamed-in-place insulation using a patented process. Polyurethane insulation delivers twice the thermal performance of polystyrene insulation of the same thickness! It also adds strength and rigidity to the door panels and helps dampen sound transmission.

The garage doors listed below have foamed-in-place polyurethane insulation:


Expanded polystyrene insulation

garage door insulationExpanded polystyrene insulation offers thermal efficiency with an R-value* between 3.7 and 7.4. Polystyrene insulation are rigid panels placed inside the door sections when they are manufactured.


*Wayne Dalton uses a calculated door section R-value for our insulated doors.