A dormer frame is created at the same time as the framing roof structure is prepared at the time of the new home.
Sheathing means plywood that covers framing studs. The sheathing is attached to the outside dormer walls and the rafts of the main roof.
The next step is to install a vapor barrier wrap on the cover on the vertical walls of the dormer. The window is usually installed forward, then shingles are installed on the dormer ceiling and the main roof at the same time so that there is no visible transition between the two.
The interior of the dormer is finished after the external work is completed. Painted and trimmed etc. At the same time, the internal loft space is finished.
When the dormer window is retrofitted, the main focus is to reduce the time the gaping hall is in the ceiling. Internal framing, such as internal rafts or tries should be made before.
The outer frame of the dormer is made on the surface of the roof. When it is completed, the connecting hall is cut from the ceiling. Only then the extra framing is done.
It is best to do this when we are changing shingles in an existing house if you have a consideration about returning one or more dormer windows. This way it is easy to put new shingles on the entire ceiling at the same time. This can provide the most harmonious look.