Traditional roofing is made 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 up to 50% more to install. So why would you think of building a green roof?
What exactly is ecological roofing? An environmentally friendly roof (GR) provides a base along with a structure where various plant life may grow. Recent GR progress has become developed in Germany. About 10% of the buildings in Germany are actually green. The covering is made up in layers, each layer fulfilling a different function. The base layer sits on top of the substrate and offers a waterproof seal towards the building. This could come in the form of metal tray roofing or perhaps a synthetic membrane. A drainage layer is included in allow water to evacuate the roof, then a filter and root protection layer. The root protection membrane prevents plant growth from puncturing the waterproof membrane and causing leaks. The last layer is the growing medium where the plant growth is bedded. Green or “living roofs” could be split into three main categories. Extensive, Intensive and Bio diverse.
Extensive green roofs – Extensive GR, (also called Eco roofing) is used to advertise the growth of mosses, herbs and grasses. The growing medium is relatively shallow with a depth which is between 60-200mm. The weight in the plant medium is 60-150kg per square metre. Eco roofing is used where there is little or no human foot traffic and low maintenance roofing is needed. This kind of roofing is definitely the cheapest to put in.
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 and even trees could be utilised. The depth in the growing medium is between 150-400mm. This pushes the load per square metre as much as 180-500kg and needs a substantial structure to back up it.
Bio diverse green roofing – Bio diverse roofing is designed to be left alone to breed a natural ecosystem. Soil levels on the surface are varied to generate a wide range of different habitats for different species. Local plants are grown and wind swept seeds are permitted to take root. Bio diverse roofing is frequently targeted at providing a certain habitat for a threatened species.
The benefits for the building – Green roofing can turn an unattractive urban roof into an aesthetically pleasing feature. Along with the aesthetic value added, living roofs provide numerous financial benefits. The waterproof membrane on roofs is subjected constantly to Ultra-violet light. These UV rays break down the surface of the roofing causing leaks and the requirement for early replacement. The growing medium of just living roofs provides a protective layer preventing damage from your sun. This can double the amount life span of the roofing and recoup the first extra expense of installation. Further, green roofing offers a thermal layer keeping the building cooler in summer and warmer in the wintertime. Planners within local government have now realized the benefits of ecological roofing. Many district councils offer financial incentives to developers using green roofing on new buildings. This trend continue as the need to reduce carbon emissions increases.
The benefits for your environment – Urban roofs built with traditional roofing materials absorb the suns rays and emit them as heat. This has resulted in the urban heat island effect. This effect is most noticeable during the night with urban areas being warmer than surrounding areas. The environment temperature inside london is approximately 6 degrees higher at nighttime because of the urban heat island effect. Green zjghhj fails to absorb the warmth radiation and so the effect is mitigated. Thus, the requirement for air conditioning may be reduced in hotter climates.
Mass urbanisation results in high water run off and flooding. Huge regions of concrete and tarmac prevent the natural drainage of heavy rainfall. Green roofing absorbs between 50-75% of rainfall, gradually releasing it into the environment. This evaporation process also cools your building reducing energy consumption and carbon emissions even more.
Depending on the growing medium as well as the species present, green roofing can store up to 239 grams of carbon per square metre. It provides 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 selection for eco roofing. Lightweight mats and module trays allow localized maintenance without having to consider the Modular Green Roof Trays. Considering the huge financial and environmental benefits associated with living roofs, the near future for green roofing looks rosy.