Dormers are small structures which project from a sloped roof. They typically begin at the ridge line or in the middle of the roof. Multiple dormers can be used with a long span or one on each pitch of the greenhouse. A traditional greenhouse appearance can be achieved by incorporating the following on a dormer:
- Pilasters can be set on either side of the gable.
- Grids can be utilized on the gable; numerous patterns available.
- A Palladian arch can be incorporated into the design.
- Ridge cresting can adorn the ridge of the dormer with a finial at the peak.
A lantern is located atop the roof and they can span the entire length of the roof or occupy only a small section. It can feature a hip end, conservatory nose, or double pitch configuration. Vents can be incorporated for natural air circulation. Lanterns add a decorative element, while allowing additional light into the greenhouse.
Dormer Entryways, Vestibules, & Headhouses
An entryway or vestibule may act as an air-lock and reduces cold air from infiltrating the greenhouse. This can prevent cold shock to the plants closest to the door. An entryway or vestibule can also offer storage and increase energy efficiency. Headhouses are much larger rooms and offer potting areas and storage for greenhouses and may even include classroom space.