1.2What’s changed

Major technical changes

The following major technical changes have been made to this edition of the Standards:

  • Chapter 2.1 “The standards and technical requirements” R3 Materials requirement a) Materials and products used for critical functions iv) acceptance in writing from NHBC Accepts.

Minor technical changes

  • Chapter 3.3.2 – additional guidance on durability.
  • Chapter 4.1.1 – table 1 now includes saline
  • Chapter 4.4.6 – additional guidance for raft and semi raft foundation design
  • Chapter 5.1.21 – reference to potential cold bridging at door openings
  • Chapter 6.1.17 – cavity trays now include reference to manufacturers recommendations
  • Chapter 6.1.18 – renamed sub heading to Wall ties and bed joint reinforcement and note added regarding vertical spacing of wall ties
  • Chapter 6.1.20 – correction for cold weather working
  • Chapter 6.3.7 – reference made to Robust Details
  • Chapter 6.7 – renumbered and re-ordered the layout for clarity
  • Chapter 7.1 - renumbered clauses
  • Chapter 7.2.13 – includes proprietary dormer within requirements and guidance
  • Chapter 7.2.24 – subtitle renamed Spandrel panels in cold roofs
  • Chapter 8.1.3 – Tables 1 and 2 updated
  • Chapter 9.1.14 – Additional guidance on drying shrinkage of concrete floors in garages
  • Chapter 9.2.3 – additional guidance for preparation to plastering
  • Chapter 9.3.5 – additional guidance on anhydrite screeds
  • Chapter 9.5.3 – protection from weather rather than just cold
  • Chapter 10.2.5 – additional guidance on guarding.

We have taken the opportunity to make a number of editorial changes throughout the document. This includes updating references to British Standards

3D models

3D models can be accessed directly within Standards Plus, the online version of the Standards, by clicking on the embedded icons. They can also be viewed on the NHBC 3D Viewer app, which hosts a library of the 3D models to view on iOS and Android devices.