The copper panels are glued in place. The photos show the sequence. The panels are paper backed. I dotted Aileen's Tacky Glue on the roof and pressed the panel in place with a pad of toweling, my fingers and a burnisher (seen at right).
The trickiest panel was the front, as it had to be gently worked behind the window sill. I don't think I mentioned earlier that these adhesive-backed copper sheets are made for copper foil stained glass projects.They are a sturdy 1.25 mil thickness able to take the rubbing and pressing. If it were any thinner, I'm afraid there would be danger of tearing.
I placed the tower roof on the house to dry overnight. I'm planning to use the salt/vinegar aging mix and will tent it with a plastic bag, so I want to be sure the glue is dry or at least well set before subjecting it to the humidity.
The shiny copper is a bold presence. The lighting was not the best for the photo, but you can get an idea of how it will work with the green shingles on the lower mansard roof bits when it takes on its own veil of green.