Roof Lantern Heat Loss

Loss of heat through warm room air reaching the glass cooling then cool air falling back into the room for you to have to re heat air leakage heat lost through cracks in the frame or from ill fitting glass.

Roof lantern heat loss.

The room will be colder more glass means more heat loss. I seriously suggest you reconsider and or consult an architect who will advise you on the likely heat losses you will suffer. Combined with high performance glazing our aluminium roof lanterns can achieve u values as low as 1 0 w m2k. Heat loss in the winter historically glazed extensions such as conservatories have gained the reputation of being too hot in the summer and too cold in the winter.

The aluminium frame is designed to be as energy efficient as possible with an insulating t bar and thermally broken eaves beam. If you re thinking of having 4m bifolds plus a roof lantern your kitchen will be so cold you could never use it. Heat loss of course incorporating a roof lantern to your extension will result in more heat loss than just a flat roof the same as putting windows in a room does. Without a roof lantern blind you are very likely to experience the following.

Well the principle of rooflight design means that a rooflight can potentially lose 35 to 45 per cent more heat during cold weather spells than a similar window installed on the side of a house. This isn t the case with the roof lanterns from sheerwater glass.