asked the Secretary of State for Northern Ireland what is the estimated difference in cost to the Northern Ireland Housing Executive between refurbishing metal window frames and replacing them.

This is a matter for the chairman of the Northern Ireland Housing Executive who has advised me that the average cost of servicing galvanised metal windows in a typical 7-window house is £150. The cost of replacement varies with the size and type of window frame and ranges from approximately £600 to £1,700 per dwelling.