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Part L 2014 – where to start: an introduction for house builders and designers – timber frame construction (for Wales)
(NF65)

Overview

This guide provides a starting point for designing new homes to comply with the 2014 edition Approved Document L1A – Conservation of fuel and power in new dwellings in Wales. It gives examples of some typical homes, outlining a combination of measures needed to comply with ADL1A 2014. The intention is to give a broad understanding of the specifications for timber frame construction that may be adopted as a starting point for detailed design. It also illustrates the effects of thermal bridging, which can have considerable impact on the approaches to overall compliance.

Summary of content

This guide for timber frame construction is intended to help house builders and designers understand the 2014 changes to Approved Document L1A – Conservation of fuel and power in new dwellings (ADL1A) in Wales. ADL1A 2014 builds on the process for demonstrating compliance established in previous editions for England and Wales. However, there are some important differences in the detail when compared to previous editions.

The guide gives examples of some typical homes, outlining a combination of measures needed to comply with ADL1A 2014. The intention is to give a broad understanding of the specifications that may be adopted as a starting point for detailed design.

To assist understanding, the guide includes ‘options for compliance’ tables, construction ‘build-ups’ and diagrams of important construction junctions to give house builders and their advisors a better feel for the critical elements and their likely performance.

This is only a general guide and there is no obligation to adopt any of the options given. You should always check with the Building Control Body that your proposals comply with all the requirements of the Building Regulations. You will also need to comply with NHBC Standards and any planning or regulatory requirements.