R value for solid wood doors this is a reprint of a recent article on some studies done to show that the straight r value of solid wood is misleading.
R value of solid wood garage door.
Below is a list of our garage doors and the r value of each one.
A 2 1 4 inch solid core wooden door for example has an r value of 3 70.
There are mainly 2 materials for insulating garage doors polystyrene and polyurethane.
Even though it seems worse than other materials because wood has a lot of mass it actually can store energy not just prevent the ingress or egress of energy which is only what r values measure.
Between 9 18 4 the difference between the r values is caused by the thickness of the doors 1 model is 1 3 8 and the other model is 2.
Higher is better when looking at garage door r values but it s not the only factor to consider.
Another thing that effecting the r value is the material of the insulation.
R values climb as thickness of the material increases.
As a final tip understand that a garage door that has an r 16 value will actually help keep your home protected from heat and humidity during the summer months.
You also add heat to the garage every time you open an interior access door from the main house to the garage.