How many homeowners are aware of the fact that, if their property has older windows with wooden frames, they are likely to be losing somewhere in the region of 20% of the property’s heat?  This heat loss is increased further if the property also has wooden doors and frames.  At a time when fuel costs are constantly escalating, these facts clearly suggest that every homeowner in this situation should investigate the possibility of reducing their energy inefficiencies and one way of achieving significant improvements in this respect is through the installation of double (or triple) glazed uPVC window and door units.