How does the system work?
VERTIGE green roofs are part of an eco-citizenship and biodiversity initiative. Integrated in the heart of urban spaces, their main purpose is to bring fauna, flora, dynamism and greenery to the grayish, often dull city landscape.
The VERTIGE concept has been created for all types of small and medium-sized buildings, with a slope of between 0 and 20%. It has been studied and adapted specifically for light-roofed infrastructures: the maximum water saturation weight is only 57kg/m², with a water retention capacity of 40.7l/m².
Easy to install, VERTIGE green roofs are assembled directly on small and medium-sized horizontal surfaces via a carpeting process.
First of all, a first layer called “drainage mat” is placed on the support. This layer aims to ease the rainwater flow and to prevent insulation of the roof, as stagnant water can damage the roof. Then comes the water retention mat that will create a rainwater tank, and the irrigation mat that will automatically water the entire VERTIGE vegetable roof activated by an ambient humidity sensor, thus removing all the potential inconvenience associated with aerial watering.
The last layer is the carpet of pre-cultivated plants. You can select your floral combination, although we recommend vegetable varieties which are resistant to thermal shock and extreme temperatures.
While certainly having an ecological impact, green roofs also bring a new aesthetic value to the urban environment and enhance homes by integrating greenery in the grayish city architecture.
Apart from their aesthetic relevance, green roofs have a powerful social impact: they contribute to a less stressful, calmer living environment, bringing balance and harmony between urban planning and nature.
Green roofs need regular irrigation to develop
Source: Instituto Geográfico Nacional (IGN) del Ministerio de Fomento.
Ensuring the durability of a green roof requires the installation of an efficient irrigation system. The VERTIGE vegetalizing process includes an automatic system based on drop-by-drop sub-irrigation with parameters of low water consumption and without filtration, according to the absorption needs of the sedum, that is, the set of plants to be used.
How does the roof irrigation system work? As we explain in our training programs, the VERTIGE system works with sensors that measure ambient humidity at all times and, based on the information received, automatically activates irrigation. This system can save up to 40% of water if compared to traditional aerial irrigation. This irrigation is essential if you want a nice vegetable roof with a permanently green sedum.
Furthermore, watering the sedum also provides natural air conditioning to the building. The humidity stored by the sedum layer cools the roof, thus lowering the ambient temperature inside the building. The temperature recorded under the VERTIGE green roofs is 26°C.
– Ecological, healthy materials for all types of roofs. VERTIGE green roofs are built with materials sourced in the recycling sector and have no allergenic or harmful elements for humans.
– The sedum used in green roofs. The set of plants used to create the vegetable blanket is called sedum, and it is made of vegetation which requires very little maintenance, therefore being the most suitable for this purpose. It includes mosses, succulent plants and grasses, persistent and perennials plants… Destined to create a green surface which is as similar as possible to a natural one, the aesthetic effect evokes clean Mediterranean vegetation, with the identifying colors of the foliage evolving with the change of seasons and the flowering cycles… Ideally, a pre-cultivated sedum blanket should be implanted directly on the surface layer, thus allowing immediate results. Thanks to the geotextile membrane incorporated in the sedum, this also allows maximum resistance to erosion caused by wind and rain, even in the case of sloping roofs.
– The history of green roofs goes back to the dawn of time. Originally intended to protect dwellings with a natural vegetation cover, this process has been used since ancient times. Without knowing precise dates, we do know that our distant ancestors covered the roofs of their homes with a cultivation substrate, often a mixture of soil and herbaceous plants, which favored the rooting and natural growth of a layer of protective vegetation… Thus were created the first green roofs! Planting grass on a roof was the most efficient way to protect the dwelling from the weather, mainly from rain and snow, and to isolate it from the cold with the mattress created by the layers of the substrate, whether it be dirt, peat or humus.
What are the benefits of green roofs?
– Improvement of thermal insulation: in summer, a green roof will provide a sort of natural air conditioning system; the vegetable cover creates a fresh zone on the roof which helps to lower the temperature of the whole building.
– Improvement of sound insulation: the thickness of vegetation minimizes ambient noise, providing better acoustic comfort.
– Management of rainwater: the green layer on the roof is essential for the retention and storage of rainwater (40.7l/m2), therefore preventing the congestion of rainwater management networks.
– Introduction of biodiversity in urban areas: the vegetable layer provides an ideal environment for the establishment of biodiversity, creating a microclimate similar to that of a roof garden, thus helping protect species in danger of extinction, such as bees, butterflies, birds…
– Waterproofing and roof protection: the vegetable carpet protects the roof, which is no longer subject to climatic variations, frost, hail and solar radiation.
– Aesthetic improvement: in line with the recent trend of introducing vertical gardens in urban environments, green roofs made of plants and flowers help integrate buildings into the landscape. Vegetation on urban roofs provides natural and ecological welfare at the very heart of cities.
– Noise prevention: the thickness of the green complex helps minimize sounds like rain pounding on steel sheet roofs.
– Lightest solution on the market: 57 kg/m2 at water saturation point, compared to competitors’ products (from 100 to 180 kg/m2)
Vegetalizing a roof in not that expensive
Contrary to popular belief, the best green roof systems are not necessarily the most expensive.
The price per square meter is calculated following different detailed criteria, and may vary according to the technical solution chosen according to the type of roof, the total area to cover or the geographical location. But it is especially important to emphasize that this investment will soon become profitable, mainly due to the reduction in the overall energy costs it provides.
These savings are so considerable that the cost of a project can be amortized over a period of three to seven years. There are also many subsidies for home renovation, such as grants and tax relief schemes that support projects with an eco-responsible approach including green roofs. If you have such a project, please do not hesitate to contact us. The VERTIGE team will be happy to offer you detailed information.
Examples of green roofs
VERTIGE on cement
VERTIGE on panel