uPVC vs aluminium windows for Chennai homes

Heat and air-conditioning

Aluminium is a metal and conducts heat quickly, so frames get hot in the afternoon sun. uPVC is a poor conductor, and its hollow chambers trap air, so the frame stays cooler and your air-conditioner works less.

Noise and dust

uPVC casement windows close onto rubber gaskets on all four sides, and with double glazing they cut traffic noise sharply. Typical aluminium sliding windows have more gaps at the interlocks and let in more dust and sound.

Salt air, humidity and rain

Close to the coast, aluminium can corrode at joints and fittings over time. uPVC doesn't rust or corrode, and good profiles are UV-stabilised so they don't yellow in the sun. Our Three Diamond profiles use titanium dioxide for this.

Maintenance

uPVC needs no painting or coating. Clean it with a damp cloth and keep the drainage slots clear. Aluminium also needs little care but may need its finish restored after years near the sea.

Strength and slim frames

Aluminium is stronger for its size, so it allows slimmer frames on very large glass walls and shopfronts. uPVC frames are a little wider, and we reinforce them with galvanised steel so they stay straight on large openings.

Cost

Basic aluminium sliding windows are usually cheaper to buy. uPVC usually costs more up front but saves on cooling, repainting and repairs over the years. Ask us for an itemised quote and compare it opening by opening.

Our recommendation

For homes in Chennai, uPVC is the better all-round choice for bedrooms, halls, kitchens and bathrooms: cooler, quieter, sealed against rain and dust, and free of rust. Aluminium still suits very large commercial glass walls where the slimmest frame matters most.