U Factor Insulated Metal Garage Door

Thermal resistance is a huge factor that affects the energy performance of insulated roll up garage doors when they are in the closed position.

U factor insulated metal garage door. 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. Air leakage on the other hand refers to the seal at the overhead door guides head and hood while the rolling door is in the closed position. Factor the more effective the insulation of the material. 2 or 1 3 8 intellicore insulation.

High quality storm doors use low emissivity low e glass or glazing. 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. The thermacore ap 850 features superior construction with a 3 thick profile consisting of high density foam injected cfc and. Nfrc u factor ratings however represent the entire window performance including frame and spacer material.

Though not used as often as r value u factor is another number you may see when shopping for a garage door. U factor will vary between 0 66 and 1 00 depending on finish and color selection. Metal framed storm doors might have foam insulation inside their frames. U factor represents the flow of heat through a material meaning the lower the u factor the better.

Find garage doors at lowe s today. U value has an inverse relationship to r value. What is the standard r value for a garage door. Other features may include screens with self.

Below is a list of our garage doors and the r value of each one. Advanced thermal performance this door system presents the most advanced thermal performance values published by any major us manufacturer of 3 commercial insulated sectional doors with an r value of 26 u value of 038 and a tested installed u factor of 14. All doors are tested in accordance with astm c1363 and sdi 113. Thermal resistance is measured using r value and u factor.

U factor is the rate at which a window door or skylight conducts non solar heat flow. For best u factor choose finish and color with high solar reflectance bright colors. Modern steel 2 or 1 3 8 polystyrene. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.

It s usually expressed in units of btu hr ft2 of. Wooden storm doors require more maintenance than the other types.