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