Low-E glass
Glass with a very thin metallic coating that reflects heat back into the room while letting light through. In winter it keeps the heat in with no visible difference in clarity. It is only ever used in an insulating unit, with the coating facing the cavity.
| Thicknesses | 4, 6, 8 mm |
| Laminated | 3.3.2, 4.4.2, 5.5.2, 6.6.2 |
| Coatings | Low-E, single-silver coating |
| Effect | 60–70% less heat loss through the glass than a standard insulating unit |
Used for
windows, doors and façades, in an insulating unit
Insulating glass
Low-E is part of every thermally insulating glass unit.
Insulating glassBuild your own insulating glass unit
Answer a few questions and the tool suggests the glass for your windows.
Build your own insulating glass unitCombined with a solar control coating
When you need to keep out the summer heat as well as the winter cold.
Solar control glassDouble or triple glazing.
The eternal debate.
| Double glazed | Triple glazed | |
| Make-up | 4 + 16 + 4 Low-E, 24 mm | Low-E 4 + 16 + 4 + 16 + 4 Low-E, 44 mm |
| Light transmittance (Lt) | 81.9% | 74.1% |
| Solar energy transmittance (g) | 63.9% | 52.7% |
| Ug | 1.1 W/m²K | 0.6 W/m²K |
Insulating units with a low-E coating.
A single layer of silver.
The coating is about 1/500 of the thickness of a sheet of paper. You cannot see it, but it reflects the room's heat back inside.
Send us your opening schedule
or a project brief.
We reply with a quote and a technical data sheet, and on request a specification clause for your bill of quantities.