It's true! Cupolas are not only beautiful, but an excellent way to help ventilate your attic.  Cupolas sit on the peak of the roof, so as the heat rises it can escape through all sides of the Cupola! This means the heat will be able to flow out in summer months and the moisture and condensation won't build up in winter.  Both heat and moisture are culprits in rotting issues to your roof, trusses and insulation.  So by placing a Cupola on the top of the roof and adding a couple gable end Louvers, you can create some great air flow to prevent this type of damage, as well as prolong the life of your roof.  Functional and appealing, Cupolas are popular and serve a very useful purpose!