uPVC and aluminium are the two serious choices for modern windows in India. Both are far better than old wooden frames — but they behave very differently in heat, noise and the long run. Here is an honest comparison to help you decide.
Heat and energy efficiency
This is uPVC’s biggest advantage. uPVC is a natural insulator, so it slows the heat moving through the frame and eases your air-conditioning load. Aluminium is a metal — it conducts heat readily, so a plain aluminium frame passes outdoor heat straight into the room unless it has an expensive “thermal break”. In most Indian climates, uPVC keeps interiors cooler for less money.
Noise insulation
uPVC’s multi-chamber profile and tight gaskets damp sound well, especially with double glazing — a real benefit on busy roads. Aluminium can be made quiet too, but usually needs upgraded glass and seals to match a good uPVC window. More on uPVC and noise →
Maintenance and weather
uPVC does not rust, rot, corrode or need repainting — a wipe keeps it clean, and it shrugs off monsoon damp and coastal salt air. Aluminium will not rot either, but in humid or coastal areas it can pit and corrode over time unless well coated. For low-maintenance living, uPVC wins.
Strength and large openings
Here aluminium has an edge: it is stronger per section, so it suits very large spans and ultra-slim sightlines. Quality uPVC handles most home windows and doors comfortably — Astrapia reinforces its profiles with 1.5 mm galvanised steel inside a 2.45 mm three-chamber section — but for a very wide storefront-style opening, aluminium is worth considering.
Cost
For a like-for-like specification the two are broadly comparable up front. But uPVC usually costs less to run (lower cooling bills) and less to maintain (no repainting), so over the life of the window it tends to be the more economical choice. See our uPVC price guide →.
The verdict
For the typical Indian home — where heat, monsoon, dust and noise are the daily reality — uPVC is the better all-round choice: cooler, quieter, lower-maintenance and easy on running costs. Choose aluminium mainly for very large or structural openings where its extra strength matters.
Astrapia makes Japanese-engineered uPVC windows and doors to your exact size and installs them across India. Get a free quote → or explore the range →.
Frequently asked questions
Do uPVC windows turn yellow over time?
Quality uPVC is UV-stabilised and colour-stable. Astrapia offers six colour-stable finishes on profile and hardware, backed by a 20-year warranty.
Is aluminium stronger than uPVC?
Per section, yes — which helps on very large spans. For normal home windows and doors, steel-reinforced uPVC is more than strong enough and insulates far better.