Few options about. Aluminium is roughly double the price of upvc. Some aluminium systems are dearer than others. Aluk and smarts are probably the most common mid priced.
As above. Loads of makes and styles available.
Can you tell us what you are trying to acheave and why your thinking aluminum in particular?
Personally I would only recommend it for bifolding doors in a domestic house or if your windows are crazy small and you really need that extra 15mm or so of glass.
I used to make and fit 90% aluminum but I would choose PVC for my own house except for the above exceptions. So many awesome new designs and styles now you cant beat it.
The aluminum windows look good. We have recently remodeled our office, and installed the new impact windows and doors. You can check it out and get better designs of windows at a reasonable price. There is a great variety in the designs of windows and doors you can select them accordingly. These windows are easy to install and also add to the beauty of the house.
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