Clear to the Sky
An unroofed area or area roofed with material that transmits 90 per cent of light.
To access the rest of this content, you must purchase a subscription.
This website uses cookies
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services.
