Grain Bin Experiment
A custom made vented skylight using perforated, corrugated pipe, laminated safety glass and structural silicone. The perf pipe sits on the outside of the fill hole curb so water does not get in when the wind blows the rain: snow just blows around it rather than going in it. The roof has not been cleaned since it was built some 15 years ago and is holding up fine. Since it is under trees the rain does not clean it off much.
Mark Clipsham