Design - What information is required to calculate the U-Value?

The U-value for a ground floor is slightly different to those of walls and roofs, rather than using a square meter cross section it is based upon the dimensions of each individual floor. Floors lose the majority of their heat through the external walls of a building, the longer the length of external wall for a given floor area, the greater the heat loss. The calculation of U-value takes this into account, we require the following information:

Floor Details

• Floor Area, in square meters
• Exposer Perimeter, in meters (for more information see How do I calculate the exposed perimeter)
• External Thickness, average thickness in millimetres

We offer several options when calculating U-Values;

• If you have a fixed depth construction, for example 300mm, we can calculate what U-value this achieves.
• If you need to achieve a given U-value we can calculate the depth of Glapor required.
• If you are unsure of either of the above, we can provide a range of different depths and the achieved U-Values to assist in the decision.