Garage Door U Value

U factor though not used as often as r value u factor is another number you may see when shopping for a garage door.

Garage door u value.

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. U factor will vary between 0 66 and 1 00 depending on finish and color selection. We tested a garaga 138 sample and it came back with an r value of 7 89. U value a unit of measurement by which heat is transferred from one side of the door to the other.

U value is the inverse of r value. The r value is determined by the thickness of the door and by the materiel that the insulation is made of. 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. U value has an inverse relationship to r value.

It also has the important advantage of measuring the thermal efficiency of the door itself. U factor represents the flow of heat through a material meaning the lower the u factor the better. See each collection or sell sheet for options. R value measures the rate of heat loss but u value measures the rate of heat transfer.

U value is less commonly used by manufacturers. For best u factor choose finish and color with high solar reflectance bright colors. The lower the number the lower the energy loss and therefore the better the thermal performance. When you want to give your home that boost in value with a garage door installation we make it fun and easy to complete the project make the smart investment on a new residential garage door available right away or designed just how you like it to get the perfect style for your home.

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. Clopay garage door r values depend on the door s thickness material and type of insulation and range from 6 3 to 20 4. A stylish and secure garage door not only enhances your curb appeal it can help keep you safe. However it s arguably the more accurate measurement of a garage door s thermal efficiency.

Installed u factor a tested value of actual energy loss whether heat or cold of an installed door wall or window assembly. With a quality double glazed unit approximate u values are 1 2wm2k or alternatively a window energy rating wer of a. 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. 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.