How are Green Roofs Made?

Green roofs are not a choice of color but a choice of lifestyle! 

Green roofs are becoming increasingly popular, especially with people who love nature and businesses paying more and more attention to the ecological system of our world. They provide many benefits, such as improving air quality, encouraging wildlife settlement, slowing water runoff, and preventing the overflow of gutters.

Green roofs are not a new concept. They have been around since the beginning of time, with one of the oldest green roofs being the Hanging Gardens of Babylon.

But what is a green roof? A green roof, also known as a living roof, is a dwelling roof covered with vegetation planted over a waterproofing sheet.

What Are Green Roofs Made Of?

There are three green roofs: intensive green roofs, semi-intensive green roofs, and extensive green roofs. Green roofs require other plants and therefore need different depths to support vegetation growth.

However, they are all built the same way. For example, a green roof comprises three layers: drainage, filter, and vegetation.

Support Structure

The first and most crucial step in constructing a green roof is to check that the building can support it and is structurally sound. The reason is that a considerable amount of weight is added as opposed to the weight of a typical roof.

Waterproofing Is a Must

The next step is the addition of a layer of waterproofing. Ideally, this must be a solid and durable material, such as a heavy-duty pond liner. This prevents dampness and roots from getting through to your roof base.

Water Storage and Drainage

Now, one is ready to add water storage and drainage layer. This consists of a layer of small pebbles to provide drainage.

A moisture blanket is added over the drainage layer. What is a moisture blanket? It is a fleecy material that serves as a moisture retainer and is essential for vegetation growth.

Your growing medium is the next step. This ever-increasing medium layer should be at least 15cm in depth.

Choosing Appropriate Plants

Now the pièce de résistance is adding a choice of vegetation. The top surface layer is what creates your green roof.

You can choose between different mixtures of seeds, small cuttings, or even herbs such as thyme. Choose lightweight rather than heavier plants in order not to add too much weight to your roof.

Make the Choice Go Green

Choosing to build a green roof can be a simple and pleasant experience.

It will require some professional guidance and expertise to make the right choice in the type of green roofs chosen. Professionals will also ensure the roof structure is correctly inspected and strong enough and, if necessary, install any reinforcement. After that, adding the final layers will be a reasonably quick process.

Don’t hesitate to contact us if you need help choosing green roofs. We are here to help and advise you on the construction of your green roof.