Solid Wood Garage Door R Value

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.

Solid wood garage door r value.

Heavy duty 1 5 8 section thickness. A 2 1 4 inch solid core wooden door for example has an r value of 3 70. 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. Calculated garage door section r value is in accordance with dasma tds 163.

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. Per inch r value of softwood is 1 41. 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.

An r value of 16 is not twice as good as an r value of 8. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. 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.

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. External panels are pressure bonded to framework with high strength waterproof adhesive. Look for a door with a good insulation value say a u value of at least 0 2 that is r 5 metric. It is so low that it is below many industry standards.

R values climb as thickness of the material increases. This value when compared to other insulating materials is actually pretty low. Insulation polystyrene insulated core provides a 4 75 r value section thickness 1 3 8 on all models. Flush panel wood garage doors model 33 three layer construction with polystyrene sandwiched between interior and exterior boards.

In hardwood it is 0 71. It does not offer twice as much thermal resistance or twice the energy savings. If installed correctly and not bent this type of door needs no further weatherstripping.