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uPVC Windows for the Monsoon

How do uPVC windows handle heavy monsoon rain and humidity? Here's what to know.

Weathertight, not just waterproof

The uPVC material absorbs almost no water, so it won't swell or rot the way timber does. But a window stays weathertight through the monsoon only if the gaskets, glazing seals, drainage, and fitting are all right.

What keeps monsoon out

Look for this

  • Complete perimeter sealing
  • Clear drainage channels
  • Good multi-point sealing against wind-driven rain
  • Proper fitting into sound structure

Why wooden windows struggle here

Timber absorbs monsoon moisture, swells, and sticks — the classic reason wooden windows jam in the rains. uPVC has no such failure mode, which is why so many monsoon-season replacements are of swollen wooden frames.

From our range

What we make

uPVC Sliding Windows

Multi-track windows that need no swing space.

uPVC Casement Windows

Side-hung sashes for full airflow and the tightest seal.

uPVC Performance Systems

Double-glazed acoustic and thermal windows.

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