Energy efficiency
How window energy ratings and U-values work, and what they mean for your heating bills.
Options
Make it yours
Pick your glass and finishing touches. Each option has its own page with more detail.
- Double glazingThe standard for warm, quiet homes.
- Triple glazingExtra warmth and noise reduction.
- Acoustic glazingFor busy roads, rail lines and flight paths.
- A+ rated windowsOur most energy efficient specification.
- Energy efficiencyHow ratings and U-values cut your bills.
- Georgian & astragal barsTraditional glazing bars for period homes.
- Timber trimsA neat finish around your new frames.
- Obscure glass rangePrivacy for bathrooms and front doors.
Galleries
View all galleries Recent installations
FAQs
Your questions answered
What is the difference between double and triple glazing?
Triple glazing adds a third pane of glass, which keeps more heat in and blocks more outside noise. It costs more and the units are heavier. For most London homes, A-rated double glazing is very effective; triple glazing is worth considering for north-facing rooms, busy roads or if you want the best possible energy performance.
Ready for new energy efficiency?
Free survey, clear price, made in Enfield.