Traditional roofing is designed to shed water as fast as possible from the Roof Garden. Conversely, green roofing actually holds water on the roof. It may also make maintenance more difficult and can cost as much as 50% more to install. So why would you think about building a green roof?
What is ecological roofing? A green roof (GR) offers a base on the top of a structure by which various plant life may grow. Recent GR progress continues to be created in Germany. About 10% of the buildings in Germany are now green. The covering is constructed up in layers, each layer fulfilling an alternative function. The base layer sits along with the substrate and supplies a waterproof seal for the building. This could come by means of metal tray roofing or perhaps a synthetic membrane. A drainage layer is put into allow water to evacuate the roofing, followed by a filter and root protection layer. The main protection membrane prevents plant growth from puncturing the waterproof membrane and causing leaks. The ultimate layer is the growing medium wherein the plant growth is bedded. Green or “living roofs” can be split into three main categories. Extensive, Intensive and Bio diverse.
Extensive green roofs – Extensive GR, (also known as Eco roofing) is used to market the expansion of mosses, herbs and grasses. The growing medium is comparatively shallow using a depth which is between 60-200mm. The weight from the plant medium is 60-150kg per square metre. Eco roofing is utilized where there is very little or no human foot traffic and low maintenance roofing is required. This sort of roofing will be the cheapest to set up.
Intensive green roofing – Roof gardens and park gardens are constructed using Intensive green roofing. This class of roofing supplies the widest selection of planting opportunities. Shrubs, flowers as well as trees could be utilised. The depth of the growing medium is between 150-400mm. This pushes the body weight per square metre up to 180-500kg and needs a significant structure to aid it.
Bio diverse green roofing – Bio diverse roofing is made to be left alone to reproduce an organic ecosystem. Soil levels on the surface are varied to generate an array of different habitats for different species. Local plants are grown and wind swept seeds are permitted to take root. Bio diverse roofing is often aimed at providing a particular habitat to get a threatened species.
The benefits for your building – Green roofing can change an unattractive urban roof into an attractive feature. As well as the aesthetic value added, living roofs provide numerous financial benefits. The waterproof membrane on roofs is subjected constantly to Ultra Violet light. These Ultra violet rays break up the top of the roofing causing leaks and the necessity for early replacement. The growing medium of living roofs provides a protective layer preventing damage through the sun. This could double the life-span of the roofing and recoup the initial extra expense of installation. Further, green roofing supplies a thermal layer keeping the property cooler in summer and warmer in the wintertime. Planners within local government have recently realized some great benefits of ecological roofing. Many district councils offer financial incentives to developers using green roofing on new buildings. This trend will continue as the necessity to reduce carbon emissions increases.
The benefits for the environment – Urban roofs designed with traditional roofing materials absorb the suns rays and emit them as heat. It has led to the urban heat island effect. This effect is most noticeable at night with urban areas being warmer than surrounding areas. The environment temperature in the uk is about 6 degrees higher at nighttime due to the urban heat island effect. Green zjghhj fails to absorb the warmth radiation so the effect is mitigated. Thus, the necessity for air conditioning might be reduced in hotter climates.
Mass urbanisation results in high water run off and flooding. Huge regions of concrete and tarmac stop the natural drainage of heavy rainfall. Green roofing absorbs between 50-75% of rainfall, gradually releasing it back into the environment. This evaporation process also cools your building reducing energy consumption and carbon emissions even further.
Depending on the growing medium as well as the species present, green roofing can store as much as 239 grams of carbon per square metre. It possesses a valuable habitat for plants and insects as well as providing food for bee’s and seed eating birds. In effect ecological roofing replaces the green footprint removed from the building.
Modern roofing materials provide a lighter, simpler to maintain choice for eco roofing. Lightweight mats and module trays allow localized maintenance without the need to take the Green Roof Modules. Taking into consideration the huge financial and environmental advantages of living roofs, the long run for green roofing looks rosy.