http://roof-maker.co.uk/new-quadruple-glazing-option/
Is triple glazed and quad glazed a gimmick or does it actually work?
What about firms that claim s reduction of U value from 0.6 to 0.30. Does one actually feel that level of difference in warmth?
Is triple glazed and quad glazed a gimmick or does it actually work?
What about firms that claim s reduction of U value from 0.6 to 0.30. Does one actually feel that level of difference in warmth?