As part of our commitment to continually improve our service and to help our clients meet their legal obligations, we continue to update the Legal Registers on our website and provide free quarterly legal compliance updates to anyone who subscribes. The purpose of these updates is to ensure you stay up to date with any changes in your legal compliance obligations, our updates can also be kept and can be used as evidence that your business is staying up to date with any changes in the legislation, this can be very helpful at audit time.
Defines requirements for buildings in relation to conservation of fuel and power.
Approved documents L1 is specific to dwellings and L2 relates to all buildings other than dwellings.
As of 6 April 2006 (2010) (2014) split into four sections:L1A New dwellingsL1B Existing dwellingsL2A New buildings other than dwellingsL2B Existing buildings other than dwellings Part L controls the insulation values of building elements, the allowable area of windows, doors and other openings, air permeability of the structure, the heating efficiency of boilers and the insulation and controls for heating appliances and systems together with hot water storage and lighting efficiency. It also sets out the requirements for SAP (Standard Assessment Procedure) calculations and carbon emission targets for dwellings. Regulation 16 requires the advertising of the SAP rating in all new dwellings.
Approved Document L1 is supported by a set of 'robust' construction details, now known as "Accredited Construction Details". which focus on way of limiting air leakage and thermal bridging in construction. By using these tried and tested details, expensive on-site testing can be avoided .In addition to insulation requirements and limitation of openings of the building fabric, this part considers solar heating and heat gains to structures, it controls heating, mechanical ventilation and air conditioning systems, lighting efficiency, space heating controls, air permeability, solar emission, the certification, testing and commissioning of heating and ventilation systems, and requirements for energy meters.
Air permeability is measured by air tightness testing for new dwellings (based on a sampling regime), all new buildings other than dwellings and large extensions to buildings other than dwellings. These four Approved Documents must be read in conjunction with the supplemental official and industry documents (the 'second tier' guidance documents).
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Including our quarterly legal compliance updates that are a great resource for evidence for your ISO audits.