Services - U-value analysis

Thermal Transmittance Calculation

(U-value analysis of Building Components for Document L compliance)

Build Check Ltd provide a thermal simulation service for building components to meet the requirements of the Building Regulations, Part L. These include:

Thermal analysis of doors, windows, floors, roofs and walls to determine U-values are undertaken in compliance of Approved Document L.

As well as the above Build Check specialises in Curtain Walling systems and Industrial roller shutter door U-value analysis.

CE Marking and Notification Status

Build Check have received UKAS accreditation and a letter of appointment confirming that they are competent to perform U-value analysis to the standards called up in EN 14351 which is the external window and door product standard, this will be the basis for CE marking of that type of product.

Build Check will become a notified body to issue initial type testing reports for thermal transmittance once the EN 14351 Product Standard has been finally issued.

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. The result can then be incorporated into the national calculation method (SBEM). Values of Psi for particular details can be calculated by using thermal modelling software in accordance with BS EN ISO 10211-2:2001.

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.

To arrange for a U-value analysis, Window energy rating or for further information please contact us or Download here