India is High UV Sensetive Country
As windows are exposed to all harsh & extreme weathers, it is important that these UPVC windows can sustain the High UV radiations in india. India is a High UV sensitive country.
In the High UV regions as illustrated in the map , the uPVc profiles are likely to change colours get yellow & greyish brown won’t look nice. It can happen if they are not formulated with enough portions of UV stablisers & Titanium Dioxide(TiO2). These addetives are very expensive compared to PVC raisins and Calcium Carbonite /filler . The low grade & unbranded profile making companies especially from china save on these in order to sell cheap in Indian markets . The new entrants in the industry use such profiles without knowing its implications , which is a matter of great concern.
When you buy upvc windows, it is recommended to talk about this with your vender and have this clarified and assured that profiles he uses can withstand the High UV radiations. The TiO2 used in the formulation is 8 parts and more ( like in Dimex Profiles) & he/she provides a third party accredited Lab test report.
1.Cipet Test report with every sale
CIPET -- Central Institute of Plastics Engineering & Technology- A Government of India undertaking
2. 8000 Hrs UV retardent test report especially for India & Australia from Dimex .Most of the other companies provide usual test reports only for 6000 hrs.