Masonry fireplaces and chimneys are constructed on site from stone or brick and mortar, and are part of the home’s structural design. Typically, these fireplaces and chimneys are built as the house is built.

How’s does a masonry chimney work? Masonry chimneys use a difference in air pressure to create the draft needed to fuel the fire and expel combustion by products

Cool, dense air surrounds the outside of the chimney while hot air from the fire fills the inside