The carpenter is now ready for the next step: First he installs the OSB underlay.
Then the tarpaper is laid over the OSB.
Then the metal roof is installed over the tarpaper. Now the model should be well protected from any potential roof leaks or even condensation. This was a problem with the old roof.
With the new metal roof in place, the new canopy is installed using much of the corrugated fiberglass which has been removed from the roof. The canopy will protect the south-facing windows from destructive UV rays which are adversely affecting the models inside the structure.
This was the last step except for the addition of some metal corner pieces.
All of these pictures can be seen in a larger size by clicking on any of them.