The BBA/TIMSA scheme was developed to help promote and assist with accurate, objective and consistent calculation of U-Values and condensation risk within buildings, highlighting the competency of the installers (and the organisations) of these types of products.
Open to TIMSA (the Thermal Insulation Manufacturers and Suppliers Association) and non-TIMSA members.
The scheme has the backing of two of the most popular U-value software providers, JPA and BuildDesk. It is also included in the RdSAP conventions document (the version of SAP dedicated to existing dwellings as a recognised calculation competency scheme).
The content was devised in association with TIMSA who continue to participate in maintaining its validity with continual development. The scheme is open to anyone seeking reassurance that the calculations being provided are supplied by an individual or company that has been subject to a rigorous and ongoing independent assessment process.