Ahoy! Roof Experts

[George Godwin]

Allen, - Thanks for your reply. My thinking is that a cuppola with a 6' shaft downward as in Chris' images is a poor and out-dated design in this day and age of energy conservation. It is also a framing challenge on the roof structure that is not worth the trouble and it does not transmit light efficiently. That is why I was indicating an alternative approach. The Sun Tube dome could be outside the Cuppola or even mounted on its roof since its a long way up and no one could see much of it anyway, even if they were looking. A cuppola with windows and shaft (what is known in these parts as a Belvedere skylight) is a rare structure and an arcane design that needs some re-thinking from an energy waste and light transmission efficiency perspective in my opinion.