The assembled Dormer is inserted into a roof opening as shown below. The three tabs of the Dormer are then glued to the back side of the roof.

Dormer Inserted into Roof (back view)

The completed result after the Dormer has been inserted into the roof opening is shown below.

Dormer Inserted into Roof (front view)

The Roof & Dormer assembly is then added to the house. The assembled kitchen is shown below.

Assembled Kitchen with Roof and Chimney