Flat Roof Insulation Building Regulations & Standards

The Regulations

Building Regulations and Standards apply statutory requirements on building work in the UK for new and existing buildings. Not only do they provide building standards with regards to design, quality, sustainability and health and safety, but they keep the UK on track with its climate change commitments. Insulation plays a key part in meeting these requirements and it is important they are adhered to.

Supporting documents are available from the government that provide detailed information on each section of the Building Regulations and Standards. Building Innovation has provided a summary of the flat roof insulation related elements of these documents and provided U-values that will help achieve compliance.
The Building Innovation Design Office always provide U-value calculations in accordance to BS EN ISO 6946-2007: Annex C in order to achieve Building Regulation/Standards  compliance. The ‘effective’ thickness of the tapered insulation is determined rather than the average thickness.  This calculation requires the insulation scheme to be subdivided into individual segment types with differing formulae applied to each type. To allow accurate determination of segment type, thickness and area Building Innovation produces a scheme design for every project enquiry received.

What is a U-value?

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A U-value is the measure of heat loss through a building element (walls, floors or roofs). U-value calculations take into consideration all components of a building element (i.e. U-value calculations for flat roofs typically take the following into consideration; outer & inner surface resistance, waterproofing system, insulation, vapour control layer, deck type, cavities, plasterboard ceiling and plaster skim).
The figures and information quoted are for guidance only.  Official Building Regulation / Standard documentation should always be consulted.

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