Most people think double glazing is very expensive and it is true, it can be. When most people look at double glazing they get a glazier to quote. They normally won't fit double glazed units to existing windows but instead replace the whole frame, leading to a cost of around $800 per square meter, or $16,000 for a normal house with 20 sq metres of window. We reduce the price as follows:-
• If you have good quality wooden frames, you can use the existing frame. This halves the cost.
• We provide sufficient information to allow you to do the work yourself. While you need certain practical skills, equivalent to being able to construct a patio, it is well within the reach of the average DIY worker. This reduces the cost further to $4,000 a house.
We only provide double glazed units with argon rather than air in the gap. While this is slightly more expensive, it improves the window performance a further 6%.
Our base product (2 sheets of 4 mm glass) costs $175 per square metre.Most windows have a 12 mm gap (20 mm total thicknes). We can vary the gap from 6 to 16 mm for the same cost (14 mm to 24 mm total thickness). Our best selling product is a high performance glass called Low/E glass. This product only comes in toughened glass (much safer) and gives thermal performance almost as good as triple glazing. This costs $245/sq metre. Note: There is a planned 7% price increase from 1st August.
If money is an issue, you are better to reduce the number of windows replaced, rather than compromising on Low/E glass. Replacing 3 windows with Low/E glass and leaving the fourth as a single pane of glass gives similar thermal performance as replacing all 4 windows with plain double glazing and the cost is around the same. It also means that you can return later and replace the fourth window.