Where required, samples of materials, products and systems shall be tested in accordance with Technical Requirement R3 and the NHBC Rules.
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Where a difference exists in how to interpret the Technical Requirements, performance standards and guidance, this would generally be resolved by further consultation, failing which, NHBC will exercise its right to decide in accordance with the NHBC Rules. Such matters are covered by statutory requirements. planning matters except where specifically referred to in these Standards.To avoid repetition, some cross-referencing is made between chapters. Individual chapters cover, as far as practical, the requirements for particular elements of construction. The Technical Requirements, performance standards and guidance form acceptable technical benchmarks for a particular item of work, but do not form a complete specification and should not be used as such in contracts. Guidance is provided to demonstrate specific technical principles, and should not be used as working construction details.
Guidance is also contained in illustrations and digital 3D models. NHBC will consider alternative methods to meet specific requirements, subject to prior consultation and evaluation. Guidance on how the performance standard may be met is shown in black text and is based on normal construction procedures and recommended practices which have been shown to be satisfactory and acceptable over time. Where the performance standards are followed, the Technical Requirements for that particular item of work will be met.Īlternative standards of performance will be acceptable only if, in the opinion of NHBC, the Technical Requirements for that particular item of work are met and the standard achieved is not lower than the stated performance standard. The performance standards support the Technical Requirements and are shown in bold black text backed with a shaded box. The Technical Requirements are shown in red text in this chapter, and must be met by the builder. The front cover of each chapter contains its scope, together with a list of its contents. The Standards are divided into 10 Parts, each covering a particular element and subdivided into chapters which, in principle, follow the normal build sequence (the list of chapters is shown in the Contents section of Part 1). The Standards come into effect for every NHBC registered home whose foundations are begun on or after 1 January 2021, and they apply throughout the UK, unless otherwise stated. The home is defined in NHBC Rules for builders and developers registered with NHBC. The NHBC Standards contain the Technical Requirements, performance standards and guidance for the design and construction of homes acceptable to NHBC. This chapter introduces the NHBC Standards and contains the Technical Requirements.