Replacing windows and doors

Compliance with building regulations

Replacement windows and doors in all buildings must comply with the building regulations.

When you sell your property, your purchaser's surveyors will ask for evidence that any replacement glazing installed complies with the building regulations.

The requirement applies where complete frames are to be replaced but not to the replacement of individual panes within a frame. The new units must meet the specification referred to in approved document part L1 for thermal insulation standards and also in terms of safety, as covered by Part K. Also, the openings areas providing ventilation and means of escape from fire should not be worse than with the existing installation.

Installations carried out by a firm which is not registered to self-certify, including work done as a DIY project by a householder, needs approval under the building regulations. You should note that you, as the homeowner, are ultimately responsible for ensuring the work complies with the building regulations.

There have been several reports of installers who are neither members of a competent person scheme nor have made an application to the council. Remember, it may delay or even stop the sale of your home if you cannot prove the replacement glazing was done legally.

All replacement glazing falls within the scope of the building regulations.

Anyone who installs replacement windows or doors will have to comply with strict thermal performance standards.

Before signing a contract to buy replacement glazing, be sure to ask whether the installer is able to self-certify. If not, either they or you will need to make an application to your council for approval under the building regulations, and pay any relevant charges.