CupolasCupolas are decorative and functional structures for a dome or roof. They are used for ventilation and architectural purposes. Cupolas have three sections: the base, the vents(louvers) or Cupolas are made from wood, copper, vinyl, or composite materials. Many wooden cupolas are made of cypress, cedar, oak, or white pine. Some have cedar shingles. Paint or stain can be applied to provide protection from the elements, or for aesthetic purposes. Copper cupolas are made from sheets of copper and provide long service life. Some are chemically-treated for a greenish finish. Others are designed to age naturally. Vinyl cupolas are made of solid, expanded, rigid, polyvinyl chloride (PVC) or AZEK. Unlike wooden cupolas, they do not absorb moisture or de-laminate. They are also impervious to salt water and insects. Vinyl cupolas and cupolas made of composite materials can be painted, typically with an acrylic. Square cupolas have a four-sided cap, hexagonal cupolas have a six-sided cap, and octagonal cupolas have an eight-sided cap. |
windows, and the cap with weathervane or finial. As a rule, the base of a cupola must conform to the pitch or slope of the roof. Typically, the slope is expressed in inches of vertical rise per twelve inches of horizontal distance or run (e.g., 4/12). Cupola vents are slats or other external openings that permit the escape of gas or air. Sometimes, these vents are used in conjunction with screens to keep out animals and insects. Cupola caps have a distinct geometric shape. Examples include square, hexagonal, octagonal, and bell-like designs. The cupola finial is an architectural detail such as a spire, weathervane, or other ornament.