uPVC Windows

What makes a uPVC window seal better

uPVC (unplasticised polyvinyl chloride) is a rigid plastic extruded into multi-chamber profiles. The hollow chambers inside the frame trap air, which slows heat and sound passing through the frame itself. Inside the main chambers sits galvanised steel reinforcement, which keeps longer frames straight in the heat of a Delhi summer; a uPVC window without enough reinforcement can bow and lose its seal.

The bigger difference is how the shutter closes. A casement (hinged) shutter is pulled tight against continuous EPDM gaskets by multi-point locking hardware, so there is effectively no gap. A sliding uPVC window seals better than a basic aluminium slider because of its deeper profiles and brush or fin seals, but it can never press shut like a casement.

Other types include tilt-and-turn (opens inward on a side hinge, or tilts from the top for ventilation), fixed lights next to opening shutters, and top-hung ventilators for bathrooms.

Profiles are typically white, with laminated wood-grain or coloured foils available on most systems.

Single glass or double glazing for road noise?

Glass carries most of a window's area, so it does most of the work against noise and heat.

Single glazing (one pane, often 5mm to 6mm, or toughened) is fine for quiet rooms and keeps cost down.

A double glazed unit (DGU) is two panes separated by a sealed spacer and air or gas gap, for example a 5mm + 12mm + 5mm build. It cuts heat gain and cold, reduces condensation, and lowers road noise noticeably.

For serious traffic noise, a DGU with panes of different thickness, or with one laminated pane, works better than two equal panes, because each pane blocks a different range of sound. We suggest this for bedrooms facing the Dwarka Expressway, NH-48, Golf Course Extension Road, the Noida Expressway or the metro line.

No window makes a room silent; the seal, the glass and the gap between the frame and the wall all have to be right. Our guide to uPVC vs aluminium windows sets out where each frame material earns its cost.

Where uPVC suits best, and where it does not

uPVC is a strong choice in high-rise flats along the expressways, where both noise and wind are high; in air-conditioned bedrooms and studies, where the insulation saves running cost; and in older builder floors in Old Gurgaon, Sushant Lok or Noida's sector housing where dust gets through tired steel frames.

It is less suited to very large openings, where aluminium's stiffness allows slimmer frames, and to windows in direct sun on a dark foil, which can heat up and move. Very wide sliding doors are generally better in a heavy aluminium or uPVC system designed for doors; see aluminium or uPVC sliding doors.

In a society, changing window frames on an exterior face often needs maintenance-office or RWA approval, sometimes with a prescribed colour. White uPVC usually clears this easily, but check before ordering. If your current windows let in dust or water, the causes are explained on window gap, dust and noise and window leaking rain water.

What decides the price of uPVC windows

uPVC windows are quoted after measuring. The uPVC window price guide explains the factors in more depth.

Profile system and wall thickness. Better systems use thicker walls and more chambers.

Reinforcement. Heavier galvanised steel for larger shutters.

Opening type. Casement and tilt-and-turn hardware costs more than a sliding mechanism.

Glass. Single pane, toughened, DGU, or an acoustic DGU with laminated glass.

Colour. Laminated wood-grain or coloured foils cost more than white.

Mesh. A sliding mesh track or an integrated pleated mesh.

Removal and making good. Taking out old frames and repairing plaster.

The written quote lists every window with its size and specification, so a living room can be given an acoustic unit and a store room plain glass, each priced on its own. That way you spend on performance only where the noise and heat actually are, and the total is clear before any advance is paid.

How the job runs and how to care for uPVC

Book a site visit for ₹99, usually within 24 to 48 hours; it is adjusted against the bill if you go ahead. We measure every opening, check the walls for square and note which rooms face the road. The written, all-inclusive quote usually comes within about two hours and is valid for three days.

A 50% advance starts fabrication: profiles are cut, reinforced, welded at the corners and glazed to size. On site we remove the old frames, fix and pack the new ones, seal the perimeter and adjust the hardware. The remaining 50% is due on completion.

uPVC needs very little care. Wipe the frames with mild soapy water, avoid solvents and abrasive powders, keep the drainage slots clear and oil the casement hinges lightly once a year. Other window and door types are in the windows and doors catalogue, and local notes are on windows and doors in Noida.