§ Mr. Laurence Robertson
To ask the Deputy Prime Minister what rules regulate the fitting of windows into houses, with particular reference to FENSA certificates; and if he will make a statement. 
§ Phil Hope
The installation of both new or replacement windows or doors in dwellings in England and Wales must meet all the relevant requirements in the Building Regulations 2000, as amended. In particular, such windows and doors must allow adequate means of escape in case of fire, adequate ventilation for both the occupants of the dwelling and any combustion appliances in it, reasonable provision for the conservation of fuel and power used in the dwelling and, where necessary, safety glazing to protect against injuries from impact. Special considerations may apply in the case of some listed buildings or those in conservation areas.
FENSA certificates are documents provided by window and door installers who are registered members of the Fenestration Self-Assessment Scheme. The certificates states to the householder that the windows and doors installed meet fully the requirements of the Building Regulations. Where windows and doors are installed by a person who is not a FENSA registered installer, the installation must be notified to the local authority, which will then have the responsibility for checking that the work complies with the Building Regulations.