The NHER (National Home Energy Rating) is a method of assessing the energy performance and fuel cost of a dwelling. It uses a similar data set to SAP but includes more detail on occupancy, location and appliance use to give a more accurate calculation of CO2 emissions and running costs for a specific dwelling. The NHER rating is not a statutory requirement. It is often used by affordable housing providers to give a good indication of potential running costs of new properties - view »
The air-tightness of a building is known as its 'air permeability' or leakage rate. Air leakage can occur through gaps, holes or cracks in the fabric of the building envelope which are not necessarily visible to the naked eye. Air leakage will affect a buildings Co2 emission rate and forms an integral part of the calculation procedure contained within Part L of The Building Regulations - view
Robust Details Limited (RDL) provides a route to compliance for Part E of the Building Regulations (England and Wales). It may be used as an alternative to on-site pre-completion sound testing and is also recognised in the Code for Sustainable Homes.
A Robust Detail, for Part E of Building Regulations, is a separating wall or floor construction which has been assessed and approved by RDL. In order to be approved, each Robust Detail must:
IF YOU BUILD USING ROBUST DETAILS YOU WON'T HAVE TO CARRY OUT PRE-COMPLETION SOUND TESTING.
To build or design to Robust Details, you will need to select the walls and / or floors you wish to use from the Robust Details Handbook. Each Robust Detail has its own Checklist. These are designed to help builders ensure that building work is carried out exactly in accordance with the Robust Detail specifications. They can also be used by Building Control Bodies, new home warranty providers and others.
Whilst RDL makes every effort to ensure that Robust Details are compatible with other standards and regulations, we cannot guarantee this. Builders and designers are responsible for ensuring that their designs and building work comply with all relevant standards and Building Regulations