Overheating Risk in New Dwellings

The assessment of overheating risk in new dwellings within SAP has often been criticised as not detailed enough, particularly for high risk scenarios Although the assessment of overheating risk currently sits in AD L1A, it was not part of the Future Homes Standard consultation issued last year. Overheating buildings is a particular area of concern for the Government and this consultation proposes the following changes;


  • Introduce a new regulatory requirement for overheating mitigation, alongside new statutory guidance, with the aim of reducing overheating risk in new-build residential buildings.

  • Remove the requirement to check overheating risk from SAP and Part L1A and create a new Approved Document which contains the requirements for developers to ensure residential buildings do not overheat.

  • Proposes two alternative approaches to demonstrating compliance with the new requirements;

    A simplified method based on prescriptive measures which have different requirements based on location (Greater London or elsewhere) and dwelling type (Houses or flats and residential units)

    A dynamic thermal analysis method using the CIBSE TM59 methodology

  • Guidance on ensuring the overheating strategy does not provide unacceptable levels of noise at night for occupants.

  • The information must be given to the owner about the strategy used to prevent overheating.

For further information on the risks of overheating in new dwellings please give us a call at Ashby Energy Assessors and speak directly with James Rivers.

Location: Friars Well Business Estate Redlands House North Drive, Wartnaby, Melton Mowbray LE14 3HQ, UK

Comments

Post a Comment

Popular posts from this blog

New Building Regulations 2019

Image
 Covid-19 has delayed but not stopped the UK legally binding target to bring its greenhouse gas emissions to ‘net’ zero’ by 2050. The government is committed to introducing new construction guidelines to achieve its ambition to be net-zero carbon by 2050. This is known as the Future Homes Standards. As a stepping stone towards the future homes standards, stricter building regulations part L that were , supposed to be introduced in 2020 have unfortunately been delayed. The new date is likely to be late 2021. While the government is still deliberating the final draft of the New Build EPC Part L following the closure of the consultation process, it is clear that the new standards are likely to call for a general upgrade of the building fabric. Despite the delayed they will still be the most recent change in a series of changes to the building regulations since the last major revision in 2013. Below is a list of the key changes likely to come into effect for new homes in England. A ne...
Read more

Domestic Ventilation Systems and Testing

Image
 In this document, a broad outline of domestic ventilation system type, installation and testing will be given for the purposes of guidance towards gaining building regulations compliance. This document will be primarily focused on decentralised System 1 and 3 extracts as the most common forms of ventilation system. Purpose of Ventilation Ventilation is supplying and removing air from a building to improve the quality of air by removing pollutants and humidity. Air may also be heated by the ventilation system to contribute to the comfort of a home. Ventilation Systems and Compliance There are four main systems for ventilation as defined in Building Regulations Approved Document Part F: Background ventilators and intermittent extract fans Passive stack ventilation Continuous mechanical extract Continuous mechanical supply and extract with heat recovery (MVHR) The systems in detail: System 1 – Extracts are installed into the utility, kitchen, toilets, and bathrooms which run when th...
Read more