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.

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. Flush panel wood garage doors. It does not offer twice as much thermal resistance or twice the energy savings. R values climb as thickness of the material increases.

Calculated garage door section r value is in accordance with dasma tds 163. A 2 1 4 inch solid core wooden door for example has an r value of 3 70. In hardwood it is 0 71. External panels are pressure bonded to framework with high strength waterproof adhesive.

If installed correctly and not bent this type of door needs no further weatherstripping. 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. The r value of a 1 3 4 inch wood door is 3 03. Insulation polystyrene insulated core provides a 4 75 r value section thickness 1 3 8 on all models.

Look for a door with a good insulation value say a u value of at least 0 2 that is r 5 metric. 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. It is so low that it is below many industry standards. Primed finish available on all models.

An r value of 16 is not twice as good as an r value of 8. Heavy duty 1 5 8 section thickness. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. Logs of around 6 inches would then have an r value that is about 8.

Flush panel wood garage doors model 33 three layer construction with polystyrene sandwiched between interior and exterior boards. Should you be concerned about r value in choosing your garage door. Per inch r value of softwood is 1 41.