Dr. Ciaran Byrne:

We have significant grants under the one-stop shop scheme for windows. The window replacement is part of the overall fabric package to get a homeowner to a B2 level. I do not want to teach the Chair how to suck eggs, but most of the heat is lost through the roof of a house, followed by the walls and then, to a much lesser extent, the windows and doors. We have included windows and doors as part of the overall package for B2 measures. There are significant grants available for window replacement.