Which component is NOT typically included in the window assembly?

The correct answer, which identifies roofing shingles as the component not typically included in the window assembly, highlights an important distinction in building construction. The window assembly primarily consists of elements directly related to the window structure itself, such as the parting bead, interior stops, and blind stop.

The parting bead is a crucial element that separates the upper and lower sashes of a double-hung window, allowing for smooth operation and proper sealing. Interior stops are installed against the window frame to hold the sashes in place and provide a neat finish to the window opening. The blind stop is another essential part of the assembly that helps secure the window sashes and prevents air infiltration.

On the other hand, roofing shingles are associated with the roof assembly rather than windows. Their function is to protect the structure from weather elements and provide a waterproof barrier, which is unrelated to the intrinsic functionality and makeup of a window assembly. Therefore, identifying roofing shingles as not being part of the window assembly underscores the importance of understanding the specific components that make up different parts of a building.