Modern houses and other buildings usually have prefabricated metal fireplaces and flues, rather than traditional brick and mortar fireplaces with brick chimneys surrounding clay tile flues. The frame that is built around a modern prefabricated chimney is called a chase. The chase is usually constructed of wood framing covered with a skin of siding, masonry or stucco. In high quality construction, the space inside the chase outside the flue will be insulated.Read More