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We have over 10 years building airtightness specialist experience and wish to advertise this to potential customers.

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We will conduct the test alongside BSRIA, Taywood Engineering or other testing bodies and ensure that the structural envelope is not breached during the test. Part 1: The draft regulatory impact assessment: this gives our assessment of the national benefits and costs of the proposals and an indication of the impact on some individual building types. It also gives the Government's aims and some background about how the Building Regulations fit into the wider actions on reducing greenhouse gas emissions and improving sustainability. Part 2: The proposed changes to the Regulations which govern when the energy efficiency requirements apply: there are proposals to alter the definitions of controlled service in Regulation 2, "building work" in Regulation 3 and to extend the powers in Regulation 16 enabling local authorities to make tests. Part 3: The proposed draft of a new edition of Approved Document L: this contains the proposed changes to the technical requirements in Schedule 1 to the Regulations, and sets out the proposed technical guidance on achieving structural envelope compliance with these requirements as amended. A short summary of the proposals is given later in this letter. Part 4: The proposed Carbon Index amendment to SAP-1998: this is a new sub-calculation within the SAP that delivers the Carbon Index given in the proposed new edition of Approved Document L as a way of showing dwellings' compliance. Also included in this document are: airtight test, insulation; Part 5: Current thinking on possible future amendments of the energy efficiency provisions: this sets out the current thinking amongst the Department's technical officers and contractors on how the suggestions collected during the preliminary consultations, that have not been incorporated in this first stage of amendments, could be introduced in the future.