Method used to create and tile a spherical roof .

I used a 3D solid modeling package to determine diameters of the rings that form this dome. Dome rings were created using a digital vernier as a pair of dividers to not only mark, but also score a groove deep enough for a scalpel to follow when cutting out.

Could have used the lathe, but didn't fancy the cold freezing temperatures of my workshop.

Thanks for Looking..........