They can be either double or triple glazed - the more layers of glass the more efficient the window.

What’s so great about highly efficient windows?

• on average, 10% of a building’s heat is lost through its windows
• with high performance windows you will live in a more comfortable environment - sitting next to a window will no longer feel like sitting beside an open fridge
• double- and triple-glazed windows can be designed to look just like your current ones, even if you live in a conservation area
• good windows insulate against sound - ideal for noisy cities.
• multiple layers of glass offer increased security
• new windows are sealed to prevent draughts

We build our own high performance sash windows

At greentomatoenergy, we build our own specially designed double- and triple-glazed sash windows. Our windows have been developed to meet the highest standard of thermal efficiency and aesthetic requirements and can be installed in conservation areas without incurring the wrath of your local planning department.