Roof Lantern Heat Loss

Convection the draft loop.

Roof lantern heat loss.

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. If you re thinking of having 4m bifolds plus a roof lantern your kitchen will be so cold you could never use it. Modern glazing has seen radical improvements and started to shake this historic view which is also the case with the roof lantern. 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.

Without a roof lantern blind you are very likely to experience the following. Combined with high performance glazing our aluminium roof lanterns can achieve u values as low as 1 0 w m2k. The aluminium frame is designed to be as energy efficient as possible with an insulating t bar and thermally broken eaves beam. 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. Including a roof lantern opens up the room and gives a feeling of space.