U-Value Analysis

Thermal Transmittance Calculation - U-value analysis of Building Components for Document L compliance

Build Check undertake thermal analysis of doors, windows, floors, roofs and walls to determine U-values in compliance with Approved Document L.

We also specialise in curtain walling systems and industrial roller shutter door U-value analysis.

Thermal Bridge analysis (Linear thermal transmittance calculations).

Thermal bridges are now controlled in AD L1 and L2, by reference to the document IP1/06 which introduces the concept of linear thermal transmittance (Psi), measured in W/mK. This is the additional heat loss through junctions of building elements per metre length of that detail.

In addition, condensation risk resulting from low surface temperatures at thermal bridges can be assessed and product designs reviewed to eliminate the risk of condensation and consequential damage to the building fabric.