Green Roofs Are Helping
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What Are The Principles Of Green Roof Construction?

In this ecologically-sensitive age, homeowners and commercial building operators are looking for ways to make their properties more energy efficient and reduce their environmental impact.


Installing a green roof - a living infrastructure that includes growing plants - is one outstanding option.


To find out more about this environmentally sound option, please return to my homepage.

What Green Roofs Actually Do?

Green roofs do an excellent job of insulating a building from heat, cold, and noise. They trap a much greater amount of precipitation than conventional roofs, and this reduces the amount of runoff they contribute to municipal drainage systems during heavy storms. When they're built properly, green roofs can even be a viable area for growing crops such as vegetables.

Assessing A Roof's Capacity

Green roofs can be designed to fit many different conditions. The slope of the roof surface, the regional climate, and the load-bearing capacity of the underlying structure all play important roles. (Of course, the owner's financial resources also make a difference!)


Deeper roofs (usually called "intensive" roofs) deliver greater benefits across the board. However, they require lower slopes, heavier structure, and more money in order to build properly. Light "extensive" roofs provide most of the benefits of green roof construction in a more affordable, flexible system. This makes them perfect for use on buildings where a heavy intensive roof would not be feasible.

Green Roof Components

Regardless of its design and overall depth, every green roof shares certain common components. The outermost layer is of course composed of living plants. On the opposite side, protecting the roof structure, is a waterproof membrane. The material the vegetation is planted in is known as the growth medium, and it can be either natural soil or a synthetic alternative. Beneath this is a drainage layer designed to capture and retain precipitation. A root barrier is installed next to prevent the roof's plants from penetrating the building.


Many modern green roof construction systems often combine one or more of these layers into a modular, self-contained package. These systems are typically designed as a series of plates, mats, or trays. Many manufacturers even offer all-in-one modules that can be installed on an existing roof in a single step. Although this minimizes the hassle involved in installing a green roof, it can also be difficult to achieve strong, long-lasting results with generic solutions like this. Most owners find that customized designs deliver the best long-term value.

A Long Term Investment

A green roof is a costly investment, and it's not something that a property owner should pick out on a whim. It's important to verify that a structure is capable of supporting a green roof and that the chosen installer can put it on properly before making any final decisions. Green roofs can cut energy costs and lower a building's negative impact on the surrounding environment, but they do have to be designed and installed properly for full effect.


The RHS offer a little further insight into the benefits of green roofs via the following link - https://www.rhs.org.uk/advice/profile?pid=289