Generally they are not grass roofs. Installation is straightforward and we would recommend a good roofing material such as EPDM or Roof membrane to be placed on the roof first. Done properly, with a roof that is strong enough to take the weight, you should have no problems with a DIY sedum roof. Please refresh the page and try again. A sedum roof is a type of living roof, consisting of a layer of vegetation that has been placed on a rooftop. THE NO.1 SITE FOR SELF BUILDERS AND HOME EXTENDERS, 12 Amazing Self Builds Featuring Structural Insulated Panels, 4 Milestone Moments for Heating our Homes in 2020, 23 Things You Can Do Without Planning Permission. Slopes and angles for Green Roofs The pitch of your roof determines how fast rainwater runs off it. You can DIY a green roof although if it is above the house it will need to conform to building regulations. Also See: Freephone 0800 774 7650. Sedum is a lightweight method to create a green roof, thanks to the modest substrate layer depth. Therefore it is standard practice to have a protection layer on the surface of the roof; this is essentially a puncture-resistant geotextile. Sedum Roof Construction Details. If done on a large scale they can noticeably lower the air temperatures in urban areas, referred to as the urban island effect. Future Publishing Limited Quay House, The Ambury, Semi-Extensive: Of slightly greater depth than extensive systems (100-200mm) but constructed on the same principles to allow for a greater diversity of plants. Therefore it is unlikely that a green roof will lead to issues with insurance. If in doubt pay a surveyor to do some calculations for your roof. So a better question, perhaps, is which green roof system is best for your project? If you want to integrate a solar light tube or roof dome it is better that this is done before the sedum roof is installed and anything like this should be done professionally so that the integrity of the roof is ensured and insurable. Sedum is the cheapest, lightest and easiest form of Living Roof, which lends itself to the DIY’er trying to green up on a budget. On a shed or garage they make a great talking point. These lightweight systems require little maintenance. Extensive: Generally a shallow layer (20-100mm) of substrate planted with low-growing, stress-tolerant grasses, mosses and sedum. The Sedum Modular or S-Pod/Sedum Tray comes in trays and can be placed straight onto a … I have recently seen a cockleshell layer being used on a number of small green roofs — cockles make a lightweight alternative to gravel. We supply our green roof trays preplanted with seven different species of Sedum and an option to add wild chive to the mix. There are now UK nurseries and seed companies that can supply plants for green roofs. However, if a green roof is installed on an existing building, the design will be limited to the carrying capacity of the existing roof, unless the owner is prepared to upgrade the structure, which can be a significant investment. Roofs which can support large plants, shrubs and even trees are far more expensive to construct. Alternatively, install a green roof on an existing shed or garage, or install an extensive system on a flat-roofed extension. Take some measurements and a few photos before seeking professional advice. The weight requirements for intensive green roofs are such that they are normally installed over concrete roof decks. They require a more substantial roof supporting structure, a thicker substrate and more maintenance. By the 1990s the market was also offering green wall systems. Contact us FAQ Why is Sarah Beeny’s House Being Constructed with ICF? There are three basic types of green roof: intensive (thick), extensive (thin) and semi-extensive (somewhere in between). In our case, a thick gravel edge holds back the soil and the roots grow to form a mat that acts like a filter. The technology developed fairly quickly and by the early 1970s cheap, relatively light, more effective systems were on the market. Sedum roof construction Components of a sedum green roof A sedum green roof is a build-up of component layers that sit on top of a conventional roof surface. Thank you for signing up to Homebuilding. They are sometimes known as living roofs and can contain sedum and a variety of New Zealand native plants, which grow in a substrate/growing medium. It replaces the ecology the new house sits upon, thereby replacing the habitat that a house takes away. There are various layers of sheeting on top to make the roof waterproof. You can see the sedum roof pictured above at Tony Almond’s SuperHome at Open Days or by appointment. This prolongs the normal life of roofing materials. Turf and sod roofs have been common in many cultures for hundreds, if not thousands, of years — the earliest recorded being from the 7th century BC. A green roof is, in ecological terms, a great and simple thing to do. A further type of green roof is known as a biodiverse or brown roof. A couple of years ago I received quite a few emails from homeowners with turf roofs, especially in Scotland, who had trouble with insurance. Firstly soils can potentially have a negative impact on the waterproofing layer. Fire risk was the primary concern for insurers. It’s slightly over-engineered but it is as solid as a rock and still growing beautifully after 5 years. These areas should be checked on a biannual basis to ensure that they are vegetation-free to allow water to move through the shingle and off the roof. They crawl over the soil media layer and have very shallow roots. This is the lightest weight all in one system available. Different depths of substrate are used according to the type of construction required. An instant green roof, pre-grown at our farm in specially designed cassettes. Cools the rooms below in summer and insulating them during winter. The roof construction is 250mm x 50mm joists spaced 600mm apart with a 18mm plywood deck. A green roof needs to be reasonably flat, not more than 20 degrees. Green roof systems should be installed by a specialist installer to drainage falls of 1:60 min. There is also a modular version which Sedum Green Roof now supplies which includes the drainage and substrate layer in Pods. For sedum roofs it is assumed that there is a gradient and about 2% is considered to be the norm. a layer of material in which the sedum can grow) above the roof’s waterproof membrane and plant the sedum. Sedum vegetated green roof designed by Urbanscape can be up to six times lighter than traditional green roof systems. Vegetation – this is the planted layer which could be sedum, mosses and grasses for an extensive roof or shrubs and trees for an intensive roof. There is a wide variety of sedums. Instead of an expanse of mineral felt, the view is one of native wildflowers, grasses and sedum and the bees, butterflies and birds that will make it home. Our special lightweight structure for flat roofs transforms your grey roof, with a pitch of 0 to 15 degrees, into a sustainable green roof almost instantly. For a wildflower roof with a 150mm depth of the substrate, work on loading capacity of 250Kg per square metre. National Energy Foundation Biodiverse green roofs are intended to generally provide a habitat to create a wider diversity of flora and fauna compared to a traditional sedum green roof. 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