by Brianna Crandall — February 27, 2015—BRE Global, independent provider of LPCB certification for fire and security products and BREEAM environmental assessment certification for buildings, is launching a new certification program that aims to reduce the level of thermal bridging that can arise in buildings and homes, causing heat loss.
Typically occurring where there is a break or weakness in the continuity of the insulation in the building fabric, heat loss due to thermal bridging can account for as much as 30 percent of a building’s overall heat losses, says BRE.
Currently thermal bridging levels are calculated using the BRE guide BR 497 Conventions for calculating linear thermal transmittance and temperature factors. The resulting thermal performance values are then used within National Calculation Tools, such as the Standard Assessment Procedure (SAP) and the Simplified Building Energy Model (SBEM).
However, at present the industry allows for “self-certification,” with no formal program in place, which can lead to potential inaccuracies, notes BRE.
The new BRE Certified Thermal Details and Products Scheme will certify the “as designed” thermal performance of thermal junction details, products (e.g. doors and windows), and major elements (e.g. flooring and roof systems). The program will enable suppliers to demonstrate to customers that their products and services meet the appropriate standards, helping clients avoid costly mistakes and reduce risk.
The program will also consider the potential risk of surface condensation and mold growth on inside surface areas, which can have significant health implications on building occupants, in some cases leading to asthma attacks and other respiratory illnesses.
An assessment of the detail or product will be carried out by BRE experts, and BRE Global will then certify the assessment. The approved product or detail will be uploaded onto an online database that will be fully searchable, providing free access for manufacturers, suppliers, specifiers and designers.
The BRE Certified Thermal Details and Products Scheme will be launched at Ecobuild March 3-5, 2015. Visit the BRE stand N4120/N5214 to find out more. The online database for the program will go live in the summer.
