Are aluminum windows better than uPVC windows?

Aluminium windows if made according to u value (Thermal ValueThe rate of heat loss is indicated in terms of the U-factor (U-value) of a window assembly. The lower the U-factor, the greater a window's resistance to heat flow and the better its insulating properties.) 

E value ( Low emissivity (low e) - actually low thermal emissivity - is a quality of a surface that radiates, or emits, low levels of radiant thermal (heat) energy) required by regularatory authorities in foreign contries are very costlier than uPVC so they have no way except to opt for uPVC which is cheaper than aluminum for same u and E values

But here we do not need u value & E value consideration except certain part in India & therefore can manufacture them at half the cost of uPVC.We have warm climate for most of the period and it is ununderstandable people installing uPvc windows of high cost which are mostly suitable for colder contries.

The doors and windows made with uPvc [raw material is cheap @ Rs 95/KG where as aluminium is costly Rs 225/KG ] are bulky and the shutter movement is not as easy as it should be unlike aluminium shutters which run smoothly if high quality runners are used.

The opening is less in case of similar type of Upvc sliding windows than aluminium sliding windows due to stopper holding the shutter earlier before reaching at the end.

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Upvc

uPVC is a harder material than wood; therefore, uPVC windows are better at retaining heat inside a building than timber-framed windows.That type of window can reduce heat loss by up to 90%.

Aluminum

is not without its benefits. It is lightweight and very weather resistant. Aluminum windows outlast uPVC. Also unless uPVC is reinforced with metal it can seem a bit flimsy, especially for French doors and windows. Although you can easily dent thin aluminum but it is a strong metal that is hard to cut. Well installed aluminum windows can provide better security than uPVC windows. Of course, if the uPVC frames have double glazing and multi-point locking systems then uPVC windows are just as secure as aluminum widows,but then the cost would be higher.

                            

 Cost wise Aluminium Doors & windows are much economical compaired with uPVC doors & windows 

Upvc windows have advantage only in extreme weather conditions like srinagar & european contries where temperature falls.

Aluminium windows offer cost saving ,resistance to cutting and its light weight