U-value calculations
What are U-values?
U-values represent how well or how poorly a building element transmits heat from the inside to the outside. This is typically shown as W/m² K.
The slower or more difficult it is for heat to transfer through an element, the lower the U-value (which is better for the building).
When do you need U-value Calculations?
U-Value calculations are needed by OCDEAs and NDEAs in order to produce accurate calculations for building regulations compliance. By calculating accurate u-values rather than relying on conservative defaults this may reduce over-specification in other areas of the building.
Building Regulations will also stipulate the maximum u-value required for each building element. U-value calculations are required to demonstrate compliance with these standards.
U-value calculations can also help to inform construction or retrofit strategies.