Are masonry chimneys often built with just mortar mix for caps?

Masonry chimneys often use mortar mix for their caps, as it provides the necessary adhesive properties to hold the materials together while also ensuring durability and stability. The mortar mix is designed to withstand the elements and can effectively seal the chimney to prevent water infiltration, which can cause damage over time.

Using just mortar mix is a common practice because it allows for flexibility during installation and can be molded to fit various shapes required for effective drainage. This is particularly important since the chimney cap's design plays a critical role in directing water away from the chimney structure, which helps maintain its integrity.

In contrast, the other choices do not accurately reflect the construction practices for masonry chimneys. While older homes may have less sophisticated cap designs, many modern constructions still employ mortar mix, contradicting the notion that only older homes utilize this method. Additionally, the use of mortar mix is not solely for aesthetic reasons; it serves a functional purpose in protecting the chimney.