Currently I'm in the process of re-modelling my shop. This is a standalone 2 car garage which was built in the 1980s. It has an asbestos roof and this needs replacing. I have already designed the new roof and interior using Sketchup and have engaged a builder to do the work.
Shop external dimensions are 5.5 m x 6.9m (approx 18' x 22.5') giving a total of around 400 sq feet.
Here are a few images of the new shop roof from my Sketchup 3D model.
New trusses in place with purlins
Drywall on the underside of the trusses in between the trusses
New steel roof which has a tiled form to look like slate (at least from a distance!) with about 6" of insulation as currently it gets really cold in the winter and too hot in the summer. (The original construction was an asbestos roof with no insulation at all!)