Energy Saving Windows

Colin’s Sash Windows are energy efficient and environmentally friendly. Here’s why:

  • They have been given an A+1 rating and have a low u value of 1.5 as standard. We can improve that to 1.3 with an A+6 rating if required.
  • We use the best quality Pilkington toughened Optiwhite on the outer pane and Optiwhite K glass on the inner pane. Optiwhite is ultra clear with high light transmission. The K glass reflects heat back into your rooms whilst letting in free heat from the sun.
  • Our high quality profile is manufactured using a lead free compound and has strong, thermally efficient internal reinforcement making excellent energy saving windows.
  • As soon as you fit your new energy saving windows you’ll notice a huge reduction in external noise and a huge increase in warmth with lowered energy bills.