Up to 40% of a home’s heating energy can be lost and up to 87% of its heat gained through glazing. These thermal performance problems can be largely overcome by selecting the right glazing systems for your orientation and climate and considering the size and location of window openings in your design. Use the Window Energy Rating Scheme (WERS), which rates the energy and energy-related performance of different window products.
* from the Australian Governments website (http://www.yourhome.gov.au/passive-design)
The most obvious benefit of the double glazed, uPVC windows is its heat and sound resistant properties, unlike its competition, aluminum, or wooden frames. Besides, it is the most practical material as it is an easily cleanable and maintenance-free substance. Fortunately, the myth about uPVC windows’ discoloration is no longer valid, since the uPVC material is produced with the latest technologies that are totally resistant to the UV rays. The uPVC framed double glazed windows are about 20-30% cheaper than its wooden counterparts. Besides all these benefits some style of construction will just not suit a simple white window frame. The good news is that the frame colors have a wide range of variety and there are even wooden-like colors where no one will tell the difference between the real thing and the uPVC material and need no repainting.
Just a bit more:
It will not be distorted over time due to humidity, it is produced for long years to come.
Yearly oiling of locks can be done DIY, no need to pay for professional
The temperature holding benefits are priceless, it holds warmth during cool winters and holds onto the pleasant ambient on hot summer days.