Which of the following is not typically considered part of a roof assembly?

Ceiling tiles are not typically considered part of a roof assembly. A roof assembly generally includes components that are directly related to the roofing system and its support structure. This includes items such as decking, which serves as the foundation for the roofing material, fascia, which is the horizontal board along the eaves, and gutters, which are involved in water drainage.

Ceiling tiles, on the other hand, are used in the interior of a building, often as part of the suspended ceiling system. They do not contribute to the exterior or structural aspects of the roof. Therefore, they would not be classified as part of the roof assembly. Recognizing the distinction between exterior elements of a roof and interior components is key in understanding building construction and assembly.