A planted or green roof defines that part of the surface of the roof of buildings which is covered with plants, and consists of the suitable infrastructure (anti-root membrane, drainage system, filters, growing soil substrate, the plants, and the irrigation system.
What is a green roof?
What kind of planting should I choose?
Planting on green roofs is of three kinds:
Extensive: Hardy low vegetation plants with the use of a thin growth medium of up to 15 cm. thickness. This is a non-accessible green roof, with low construction cost, requiring only limited maintenance. The planting medium is capable of holding a certain quantity of water. The load ranges from 70 to 140 kg/m2saturated, and the root system of the plants is shallow.
Intensive: Intensive planting requires a great thickness of the soil layer, and usual garden plants (grass, low bushes and small trees). Green roofs with intensive planting are regarded as accessible, and pedestrian walkways are used. The planting zone must be large, as must be the drainage zone.
Semi-extensive: Consisting of an infrastructure system and a light underlay for plant development of a depth of 10 to 25 cm, with a saturated load of 120 – 250 kg/m2. This is the intermediate, between the intensive and the extensive, type; it is applied to sloping or level green roofs and requires maintenance (irrigation, fertilisation, etc.). The diversity of species used includes natural grass, lawns, herbaceous plants, and small / medium-size bushes, on any green roof around the world.
Why our green roof is better?
Monotech applies an innovative, lightweight, easy to install system, with high water retention capacity, designed specifically for a green roof on homes, and commercial and industrial buildings in urban areas.
This consists of TPO membrane, a drainage system with or without extra water storage, a growing medium – a unique patented rock mineral wool substrate – and a vegetation layer. The obvious advantage is that kind of a medium is ideal for a green roof!
green roof benefits
The benefits from the construction of a green roof are environmental, economic, and social:
Reduction of urban heat island effect by means of an improvement in the microclimate by lowering the surface temperature by up to 40ºC compared with classic roofs, and therefore a reduction in the energy footprint by means of a decrease in the amount of the emission of CO2 into the air.
Decrease of the burden on sewage systems by 70 – 95% in summer.
Improvement of the quality of the air by reason of the absorption of airborne particles (e.g., smog, heavy metals, volatile organic compounds).
Creation of a natural habitat because of the creation of a microclimate and of the conditions for the development and accommodation of a biodiversity which has been disturbed by excessive urban development.
Increased lifespan of the green roof because of its protection from ultraviolet radiation.
Reduced costs for maintenance and renovation of a green roof.
Improved energy yield by energy cost savings by 25% for heating and 75% for cooling of energy consumption.
Noise reduction because of the soundproofing achieved by the protective layers of the green roof in urban areas, especially in the case of residences near motorways, in industrial areas, and close to airports.
Positive psychological impact because of a feeling of relaxation on the part of occupants.
Development of mini-crops within the urban fabric, thus reducing the consumer environmental footprint, and giving a sense of self-sufficiency in food resources to users.