Besides the eyebrows, built with small shots of rebar and wooden forms to hold the arched concrete, we’re adding 18” paper forms to make ‘star gazing’ windows.  These windows are made by taking 18” wide, 1 meter long forms and filling them with styrofoam and cement, and then using the form to build walls around. The result will be 18” fixed windows in our ceilings to view the stars. Lovely solution that Ricardo and his team have come up with.  The styrofoam filling with small cement makes them portable and strong.