A rooftop garden, also known as a green roof or living roof, is a garden on the roof of a building. This architectural feature has gained significant popularity in recent years due to its numerous benefits, including improved insulation, reduced stormwater runoff, and increased biodiversity. But what do you call a rooftop garden? The term 'rooftop garden' is the most common and widely used, but there are other names that refer to different types of these green spaces.
Rooftop gardens can be found in various forms, from simple planters to extensive green roofs that cover the entire surface of a building. They can be designed for aesthetic purposes, to provide habitat for wildlife, or to serve functional purposes like absorbing rainwater. Regardless of their purpose, these green roofs have become an integral part of modern architecture and urban planning.
Types of Rooftop Gardens
Understanding the different types of rooftop gardens can help you determine the most appropriate term for a specific green roof.
Rooftop gardens can be categorized into two main types: intensive and extensive.
Intensive Rooftop Gardens
Intensive rooftop gardens are designed to support a wide variety of plants, including shrubs, trees, and even lawns. These gardens require a significant depth of growing medium, typically ranging from 12 to 36 inches, and often include irrigation systems and other amenities like seating areas and pathways.
Due to their depth and the variety of plants they support, intensive rooftop gardens are sometimes referred to as 'green roofs with gardens' or 'rooftop parks'. They are typically found on commercial buildings and are often open to the public.
Extensive Rooftop Gardens
Extensive rooftop gardens, on the other hand, are designed to be lightweight and low-maintenance. They typically have a growing medium depth of less than 6 inches and support hardy, drought-tolerant plants like sedums and grasses.
Because of their simplicity and the types of plants they support, extensive rooftop gardens are sometimes called 'sedum roofs' or 'green roofs'. They are often used on residential buildings and are typically designed to be self-sustaining, requiring little to no maintenance once established.
Other Names for Rooftop Gardens
In addition to the terms 'rooftop garden' and 'green roof', there are several other names that refer to these green spaces.
In some contexts, rooftop gardens may be referred to as 'living roofs', a term that emphasizes the dynamic, living nature of these green spaces. They may also be called 'eco-roofs', a term that highlights their environmental benefits. Other names include 'green roofs', 'vegetated roofs', and 'roof gardens'.
Green Roofs vs. Roof Gardens
While the terms 'green roof' and 'roof garden' are often used interchangeably, there is a subtle difference between the two.
A 'green roof' typically refers to any rooftop that is covered with vegetation, regardless of the type of plants or the depth of the growing medium. A 'roof garden', on the other hand, is a more specific term that refers to a rooftop garden that is designed to be a functional outdoor space, complete with seating areas, pathways, and other amenities.
Rooftop Farms and Edible Gardens
Another type of rooftop garden that deserves a mention is the rooftop farm or edible garden. These green spaces are designed to grow food, typically vegetables and herbs, and are often found on commercial buildings in urban areas.
Rooftop farms and edible gardens are sometimes referred to as 'urban farms' or 'vertical farms', although these terms can also refer to other types of agricultural operations. They are an important part of the local food movement and provide fresh, locally grown produce to urban residents.
In the end, the term you use to refer to a rooftop garden will depend on the specific type of green roof you are talking about and the context in which you are using the term. Regardless of what you call them, these green spaces play an important role in sustainable urban development and have the potential to transform the way we think about and interact with our cities.