U-Values of Elements
A guide to the specification of insulation materials in order to achieve compliance with Approved Document L1B 2010 the Building Regulations for small domestic works.
Introduction
Members of the BBA Competency Scheme for U-value and condensation risk analysis have been pleased to work with Hertfordshire Building Control Technical Forum in updating this Technical Note 10. The scheme members, Knauf Insulation, Kingspan Insulation, Recticel Insulation, Rockwool and Sheffield Insulations Group Technical Services,
made the necessary calculations and populated the matrix provided with U-values calculated under the auspices of the competency scheme, using the competent persons at their disposal.
The content of the scheme has been devised in association with TIMSA, the Thermal Insulation Manufacturers and Suppliers Association, which includes the above companies who continue to participate in maintaining its validity with ongoing development. The scheme is however open to non-TIMSA members as well, and provides
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.
