Introduction to Part L and Insulating Pipes and Ducts - Rockwool

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An Introduction to Part L

2013 The insulation of pipes and ducts is essential to minimise heat losses for heated systems and heat gains for cooled systems. For cooled systems, it is also important to ensure that the risk of condensation is adequately controlled. Guidance on controlling condensation is also provided in this Part L Rockwool guide.

This document is a support document to our publication ‘Approved Document L 2013 Edition (England) An Introduction to the Changes’ which is available from our the Rockwool website.

Part L - Insulating pipes and ducts

The new Approved Documents ADL1 and ADL2 rely on ‘second-tier’ documents published by the department for Communities and Local Government (CLG) to provide detailed information on the minimum provisions necessary to comply with the requirements of the Regulations.

The Part L second-tier documents for pipe and duct insulation

ADL1 Dwellings

The ‘Domestic Building Services Compliance Guide, 2013 Edition’, provides guidance on the means of complying with requirements for space heating systems and hot water systems in new and existing domestic buildings.

ADL2 – Buildings other than dwellings

The ‘Non-Domestic Building Services Compliance Guide, 2013 Edition’, provides guidance on the means of complying with requirements for space heating systems, hot water systems and cooling and ventilation systems in new and existing non-domestic buildings.

Domestic building services compliance guide

Approved Documents ADL1A and ADL1B rely on ‘second tier’ documents to provide detailed information on the minimum provisions necessary to comply with the requirements of the Regulations.

The Domestic Building Services Compliance Guide (2013 Edition) is a second tier document providing guidance on the means of complying with the requirements for space heating systems and hot water systems.

Minimum provisions for insulation of pipes

The minimum provisions shown below for the insulation of pipes are repeated in the Domestic Building Services Compliance Guide (2013 Edition) for fuel types and heating systems as follows;

  • Gas-fired primary and secondary space heating and hot water
  • Oil-fired primary and secondary space heating and hot water
  • Electric primary and secondary space heating and hot water
  • Solid-fuel primary and secondary space heating and hot water
  • Community heating
  • Solar water heating

This document continues to discuss various topics, including minimum provisions for the insulation of new system pipes, as well as non-domestic building services compliances.

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