Aluminium not a great idea, it's only advantage over pvc is color. Pvc is the standard in the UK where insulation is taken seriously, even in tenements they have it, and retrofitted into 500 year old buildings. Thermal Frame, great product and service. Cheaper than broken alu too. Alu companies all had awful service when I talked to three of them.
timmmay: Aluminium not a great idea, it's only advantage over pvc is color. Pvc is the standard in the UK where insulation is taken seriously, even in tenements they have it, and retrofitted into 500 year old buildings. Thermal Frame, great product and service. Cheaper than broken alu too. Alu companies all had awful service when I talked to three of them.
On tablet, sorry for language.
I think, to be fair, there are two other main issues with uPVC (which we generally just call PVC).
One is longevity. I note the British Plastics Federation gives an expected life-span of 35 years for uPVC windows. PVC does break down over time especially with exposure to sunlight despite additives to slow the process. Once it becomes brittle it might not be a problem until it gets knocked and then it cracks etc. Perhaps a more realistic span is 50 years but it still seems a throw away approach to me.
The other area is toxicity. PVC is a very difficult substance to recycle or dispose of effectively and can be very toxic in the environment.
Any product has it's pros and cons but we need to be aware of them.
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