Barn cupolas are commonly much smaller, and square or octagonal
in shape. Barn turrets are often slatted to provide ventilation.
Traditional barn cupolas are generally composed of several
parts: a base, slatted ventilation walls, and a roof with
planes that join to form a point. A weather vane is often
placed on top. This roof cupola design is also popular with
smaller houses and gazebos.
Many choose decorative roof cupolas that provide lighting
which shines through glass panes. These cupolas are often
refered to as "lanterns".
Roof turrets often have a classic wood construction. Vinyl
models are also popular, as they are durable, and their paint
is less prone to chipping.