Double glazing attracts a lot of marketing claims. Here's an honest sorting of what's true and what isn't.
Double glazing means two panes of glass with a sealed gap between them. The trapped gap slows heat and sound transfer far better than a single pane can.
Single glazing is one pane of glass. It's simpler and cheaper, and on a sheltered, quiet opening it's often perfectly adequate.
The two biggest myths pull in opposite directions — that you must double-glaze everything, and that it's pointless in a hot country. Neither is right: it's genuinely useful on the hot and noisy openings, and unnecessary on the rest.
No — that's a sales myth. It earns its place on sun- and road-facing openings; on sheltered, quiet ones single glazing is often adequate.
No — that's the opposite myth. It slows heat coming in, which is exactly what you want here.
No — it reduces noise; it doesn't eliminate it. Laminated glass and tight sealing do more for sound.
Related guides covering this topic from other angles — different products, applications, or contexts.
Tell us your openings and we'll measure on site, advise, and give you a real quote — factory-direct from our Pannimadai works in Coimbatore.