Frequently Asked Questions

Here are answers to some common questions we often get asked.

Airtightness Testing FAQ

If you’re building a new house that needs to comply with Building Regulations.
We would say, when the house or flat is all but complete, when trades such as plumbers, electricians and decorators have finished and just before the carpet of flooring is ready to be fitted.
Absolutely, please call or email us with a question or download our site readiness guidance document from the downloads section of the website.
If you follow our advice and guidance this shouldn’t happen but if it does we will be able to show you where leaks are occurring and advise you how to rectify the situation. Most tests fail because the test is carried out too soon.

Yes they are – but this should be by designed ventilation which is controllable so it enables the occupant to choose when to let the warm air out.

New Build SAP & EPC FAQ

A SAP calculation is needed for each property on a new development. It should be provided before works commence so the developer has confidence that the finished dwelling will comply with Building Regulations.

The EPC is produced when the property is finished it will be based on the final SAP calculations allowing for any changes to the design during the construction phase.

To begin with – Drawings and construction notes showing the build up of the floor, walls and roof. Details of windows and the proposed heating system, lighting and ventilation.
Yes, with over 13 years experience and having adapted to several changes in the Building Regulations requirements we can advise what will, what might and what may make it difficult to comply.

It’s not necessary to carry out a site inspection, the assessment is based on drawings and construction specifications provided by the developer. Although if we carry out the airtightness testing we can record some of the details whilst we are there.

Depending on the number of plots, SAP’s can usually be done within a week, it may take longer if specifications need to be discussed or various scenarios considered.

EPC’s can generally be done within a few days after the airtightness test is carried out. However, it is necessary to obtain evidence to support the final specifications that will satisfy a Quality Assurance audit by the accreditation scheme.

Existing Building EPC FAQ

If you are selling or renting your property to a new owner or tenant you will need a valid Energy Performance Certificate.
An Energy Performance Certificate will remain valid for a period of ten years, after that it will need renewing if the property is to be sold or let to a new occupier.
A survey of the property will be carried out by a Domestic Energy Assessor. It is generally based on the date the property was built and visual inspection. Any information that shows improvements to the property is very helpful. Original drawings or those produced for an extension are invaluable.

The inspection is a visual record of the features of the property. It will require full access to the property and surrounding area and involve measuring dimensions, recording relevant details and taking photographs.

The site inspection should take about an hour, possibly longer depending on the complexity of the property.
EPC’s can generally be produced within a day or two of the site inspection.