Which of the following is NOT a type of construction joint?

The choice of Roof-to-Floor as the option that is not a type of construction joint is understandable because it does not refer to a commonly recognized category of construction joint. Construction joints are typically used to accommodate movements such as expansion, contraction, or settlement in the structure.

Head-of-Wall joints are important as they allow for movement between a wall and floor or roof system. Wall-to-Wall joints facilitate the transition between two vertical surfaces, providing flexibility where two walls meet. Curtain Wall joints are specifically designed to accommodate movements in non-structural cladding systems that cover the exterior of buildings, ensuring that they can flex without compromising the integrity of the overall structure.

In contrast, Roof-to-Floor does not represent a traditional joint that is typically recognized in construction practice. Instead, it implies a more general concept of connection or interface rather than a distinct joint type designed to address structural movement. Consequently, this makes Roof-to-Floor the correct response to identify as not being a type of construction joint.