The attic insulation has been done to 300mm of rock wool.  The new windows will be just double glazed, but to a high U value.  I don't think ambient temperatures in Ireland justify triple glazed.  Have already installed insulated wooded laminate flooring (over concrete) in most rooms.  Have considered ground source heat pump but the cost is considerable and not really an option until the time comes to replace the Kerosene range.

notes from no w here