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Design clinic: Which is best — double or triple glazing? 

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The new PVC window formats are versatile, good vale and some types come with insulation.

The new PVC window formats are versatile, good vale and some types come with insulation.

Crittall-style windows are very on-trend but thse steel windows are also very expensive. For this project, Denise designed a timber version by Kells Joinery.

Crittall-style windows are very on-trend but thse steel windows are also very expensive. For this project, Denise designed a timber version by Kells Joinery.

In her own home, Denise chose double-glazed slimline aluminium windows because the rear of the house had a sunny south-facing aspect.

In her own home, Denise chose double-glazed slimline aluminium windows because the rear of the house had a sunny south-facing aspect.

Aluclad double glazed sliding doors look sharp in a project that Denise designed.

Aluclad double glazed sliding doors look sharp in a project that Denise designed.

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The new PVC window formats are versatile, good vale and some types come with insulation.

Question: I want to improve my home’s BER rating by replacing my windows. But I’m reading conflicting information about what to do. What’s the difference between double and triple glazing?

Answer: There are several differences between triple and double glazing, the first being the number of panes of glass that make up each window. Triple glazed windows have three panes, while double glazed windows have two.


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