What type of bond provides no interlocking between adjacent masonry units and is primarily used for architectural effect?

The type of bond that provides no interlocking between adjacent masonry units and is primarily used for architectural effect is the stack bond. In stack bond construction, the masonry units are stacked directly on top of each other in a vertical alignment without overlapping. This results in a straightforward, linear appearance, which can be aesthetically pleasing but does not provide the structural integrity that interlocking patterns do, such as those seen in other bond types.

Flemish bond and English bond both feature interlocking patterns that enhance the strength and stability of masonry structures. They involve the use of alternating headers and stretchers, creating a more secure bond. Header bond primarily consists of headers placed in a row with no stretchers in between, and while it has some interlock, it is not meant for the visual minimalism that stack bond offers. Thus, stack bond is distinct in its structural simplicity and is predominantly valued for its visual characteristics in architectural design.