Exterior Wood Door R Value

For example a building with material with an r value of r 11 converts to an u value of 0 09 1 r or 1 11 0 09.

Exterior wood door r value.

Based on astm c518 calculation method the door has an r value of up to 11 but using astm c1363 tested operable the same door only have an r value of up to 3 5. As the first and last impression made on visitors to your home your front door is a symbol of your creativity and style. The r value which is a measure of thermal resistance. Whether used as a front door or on the patio your simpson.

Reference table for u values u value is the coefficient of transmission i e the transmission of heat through the materials which compose the building s envelope or outer shell. In new homes especially in cold climates in very energy efficient buildings. Discover the difference of an exterior door from simpson. A 2 1 4 inch solid core wooden door for example has an r value of 3 70.

U value has an inverse relationship to r value. R values climb as thickness of the material increases. This is a huge difference and essentially comes down to astm c518 being a theoretical maximum based on a steady state thermal test of only a portion of the door panel. For example the typical r value of a six panel wood door is a two whereas a fiberglass door system may have an r value of 10 or 12.

Look for a door with a good insulation value say a u value of at least 0 2 that is r 5 metric. Welcome even more beauty and quality to your home with our comprehensive collection of exterior wood doors. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. The higher the r value of the energy efficient entry door the better the insulation.

Below is a list of our garage doors and the r value of each one. Rustica s french style sliding barn doors entry doors and rustica s replacement windows have the most efficient r value on the market listed at 3 94 for interior doors and replacement windows and 5 31 for a 2 1 4 exterior door. 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.