Solid Wood Garage Door R Value

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.

Solid wood garage door r value.

The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. It does not offer twice as much thermal resistance or twice the energy savings. Primed finish available on all models. Flush panel wood garage doors.

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. The r value of a 1 3 4 inch wood door is 3 03. Logs of around 6 inches would then have an r value that is about 8. Heavy duty 1 5 8 section thickness.

Look for a door with a good insulation value say a u value of at least 0 2 that is r 5 metric. Calculated garage door section r value is in accordance with dasma tds 163. External panels are pressure bonded to framework with high strength waterproof adhesive. Below is a list of our garage doors and the r value of each one.

R values climb as thickness of the material increases. Should you be concerned about r value in choosing your garage door. A value of r 16 offers a 5 reduction in heat flow and a 5 improvement in energy efficiency over an r value of 8. Per inch r value of softwood is 1 41.

Flush panel wood garage doors model 33 three layer construction with polystyrene sandwiched between interior and exterior boards. For example a 1 1 2 inch 3 81 cm thick door without a window offers more than five times the insulating value of a solid wood door of the same size. Insulation polystyrene insulated core provides a 4 75 r value section thickness 1 3 8 on all models. Many of these doors are remarkably like real wood and may have a thick polyurethane or other foam core a feature that boosts their insulating value.

A 2 1 4 inch solid core wooden door for example has an r value of 3 70. If installed correctly and not bent this type of door needs no further weatherstripping. It is so low that it is below many industry standards.