Garage Door U Value

A stylish and secure garage door not only enhances your curb appeal it can help keep you safe.

Garage door u value. It also has the important advantage of measuring the thermal efficiency of the door itself. Generally these will offer the highest levels of insulation when installed fully behind a garages structural opening and will usually provide a u value of between 1 4 and 2 w m k when fitted. With a quality double glazed unit approximate u values are 1 2wm2k or alternatively a window energy rating wer of a. For best u factor choose finish and color with high solar reflectance bright colors.

U factor though not used as often as r value u factor is another number you may see when shopping for a garage door. U value a unit of measurement by which heat is transferred from one side of the door to the other. 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. What is the standard r value for a garage door.

See each collection or sell sheet for options. What s interesting about this door is that overhead s certified statement says that the door has a u value of 24 or an r value of 4 17. U factor represents the flow of heat through a material meaning the lower the u factor the better. The measurement is calculated in btu s and is the amount of heat transferred in one hour with a one degree temperature difference across one square foot of the door.

U value has an inverse relationship to r value. U factor will vary between 0 66 and 1 00 depending on finish and color selection. 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. For example clopay has few different types of 3 lyres door steel back door and the r value rated between 9 18 4 the difference between the r values is caused by the thickness of the doors 1 model is 1 3 8 and the other model is 2.

We tested a garaga 138 sample and it came back with an r value of 7 89. Installed u factor a tested value of actual energy loss whether heat or cold of an installed door wall or window assembly. The r value is determined by the thickness of the door and by the materiel that the insulation is made of. The lower the number the lower the energy loss and therefore the better the thermal performance.

Clopay garage door r values depend on the door s thickness material and type of insulation and range from 6 3 to 20 4. U value is less commonly used by manufacturers. However it s arguably the more accurate measurement of a garage door s thermal efficiency. R value measures the rate of heat loss but u value measures the rate of heat transfer.