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For ultimate convenience, you may want to consider sedum roof trays.

You can still enjoy the benefits of better sound protection, improved thermal performance and a cooling effect in hotter months.

These can easily be installed on sheds and garages. If you are looking for a low maintenance, lightweight green roof that features simple and self-maintaining vegetation then the extensive green roof is for you. It should be clear from the above which green roof type is best for you. Find out more in our green roof tray guide or check out our market-leading sedum roof trays. They can be placed on top of an existing waterproofing layer and require no specialist knowledge to set up. These trays can be combined to cover any size of roof, and are straightforward to install. Green roof tray systemĪ green roof tray system is a type of extensive green roof where individual, self-contained trays contain everything needed for a sedum green roof. With more depth of growing substrate (100 – 200 mm) it can support a greater diversity of plants but not shrubs and trees.

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Drainage membranes such as the PermaSEAL PRO 20P drainage and storage membrane, or the PermaSEAL PRO 11 Geodrain Membrane, are designed with stud profiles that allow water to be drained away quickly and effectively, preventing water logging and any pressure build up.Ī semi-extensive green roof system sits somewhere in between the two main options, and is based on the extensive roof principles. They need much more attention and maintenance – much like a normal landscaped garden.įast drainage is key for intensive systems as water will be retained in the soil, and any excess that isn’t drained away can saturate the roots of your vegetation. Intensive roofs require a much deeper substrate to be built up - this means additional weight that will need to be supported as well as irrigation requirements. They are more common in larger commercial projects including parks and gardens where recreational use is expected. They require a layer of growing medium / soil to support this much thicker vegetation layer. You may find that they are referred to as roof gardens. Intensive green roofs are designed to support much larger items like bushes and small trees as well as a wider variety of plants. If you are using sedum blankets then you will require some additional growing medium but it can be fairly shallow. Sedum green roofs are the most common type due to the hardiness and low maintenance requirements of the plant. Extensive green roofs normally have an attractive low layer of vegetation, around 80 - 100mm high such as grass, moss, sedum or small flowers. They are suitable for both existing and new build roof decks. Let’s look at the differences between them: Extensive green roofsĮxtensive green roofs are a popular option for homeowners as they are lightweight and require very little maintenance with no need for additional watering unless there is a prolonged drought. It’s also important to mention green roof tray systems (an instant extensive green roof option). When it comes to your options, there are three main types of green roof to consider – extensive, intensive and semi-intensive. Green roofs are sometimes referred to as living roofs, grass roofs or sedum roofs, but these all relate to the same thing.

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In this guide we take you through the main considerations around choosing a green roof system, how to design it to meet your needs and then we cover green roof construction. They also have a positive environmental impact, attracting wildlife such as birds and insects, and improving air quality in particular in urban areas. Green roofs extend the life and improve the performance of the roof, cutting energy costs. They also deliver a whole range of benefits. A green roof is a great way to create an attractive design feature on an outbuilding like a shed or garage or transform your home.

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