COMPARE · SIDE BY SIDE
Single vs double glazing
Insulation versus light, priced in energy and yield.
| Single glass | Double / insulating glass | |
|---|---|---|
| Light transmission | Highest | Lower by roughly 5–10 points |
| Heat loss | High at night | Substantially lower |
| Condensation | Common on cold nights | Reduced, better disease control |
| Weight and frame | Lighter, simpler | Heavier, stronger glazing detail |
| Where it wins | High-light, high-heat, low-heating sites | Cold winters with expensive energy |
In a heated cold-climate house, double glazing usually pays through energy and quality. In a high-light site with little heating, it costs light and money for little return.
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