The greening of a roof or Horizontal Vegetated Complex Wall (known as "PCVH") can be defined as the installation of a set of materials and plants composing a microflora with a water drainage system . The installation of green roofs is more suitable for new buildings, however, the greening of existing roofs is possible
A green roof is composed of several superposed layers:
- A supporting structure
- A vapour barrier
- An insulating layer
- A drainage and filtration layer with an anti-root surface
- A substrate
- A vegetation
According to the French Trade Union Chamber of Waterproofing (CSFE), green roofs have much better waterproofing qualities than traditional roofs, allowing them to increase sustainability ( heat reduction, water filtration, pollution control, etc.) of the roof. This technique was developed in architecture in the 1970s mainly in the Scandinavian countries, Germany, Switzerland and more recently in France and Belgium in the 1990s and 2000s.
The world market for green roofs is growing rapidly since 2014, dominated by the North American market followed by the European and then Asian market and driven by the construction and urbanisation policies of major cities.
The the French green roof market is dynamic although it lags relatively behind neighbours such as Germany and therefore has significant growth potential.
The demand is still very largely public in particular cities, with regard to commercial or residential areas. The legislative and fiscal framework also plays an important role in stimulating and encouraging the installation of green roofs.
More than the search for a particular aesthetic, it innovation is key in this market. Green roofs are constantly improving their performance environmental performances emissions, whether in terms of their potential for thermal and sound insulation, rainwater management or their impact on biodiversity. Green roofs are also prime locations for develop urban agriculture
1.2 The global market: a fast-growing market
The global roofing market is growing strongly and should represent ***.* billion of dollars in ****.
The green roof market is also highly correlated with the overall roof market and global economic growth.
According to Technavio, the market for roofing green building materials is the second most important sector in the "green" ...
1.3 A dynamic French market that continues to grow
In general, the evolution of the green roof market is very positive related to the health of the construction market in France . Although this market has a positive outlook for the coming decade on a global scale, in France it remains fragile after a crisis in **** that had a lasting impact ...
1.4 Analysis on the adjacent market for green roofs, green walls
A green wall is a system, using tiles or plant modules, that allows the integration of vegetation into building facades
The construction of green walls can be distinguished from that of green roofs by the additional skills it requires. Indeed, the construction of green walls includes an additional difficulty the installation ...
2.1 Segmented and increasingly demanding demand for supply
The demand is divided into two parts: green roofs for new buildings under construction, or the conversion of existing roofs into green roofs
For the time being, the renovation of existing buildings with green roofs is still very limited (***), the commercial and industrial surfaces represented **% of the market and the The ...
2.2 Rising consumer expectations
Consumers and public authorities have increasing quality requirements for green roofs.
As a result, they require greater plant diversity. In order to create a varied and aesthetic microflora, producers must introduce new plant varieties. Consumers are looking for green roofs that can contain greater biodiversity. For example, some producers are looking ...
2.3 A sector boosted by the public sector
For the moment in France, the sector is driven by public orders . About three-quarters of orders for green roofs are placed by the state, according to the specialist SECC . The reason for the hesitation of the private sector is the high cost of greening a roof
The State also leads many ...
2.4 An evolution of the ecological virtues sought in cities
The popularity of green roofs is explained by the fact that they are beneficial to the environment in several ways. First, they make it possible to to avoid flooding in urban areas by reducing rainwater runoff. Secondly, they make it possible to reduce pollution in urban areas by depolluting rainwater by ...
3.1 Price competition still low
Price competition between different green roof suppliers is average since the market is still young and prices are rather similar depending on the roof range.
The number of green roof service providers in France is still quite small and faces a significant increase in the number of green roof service providers ...
3.2 Market value chain
The creation of a company in the green roof sector requires a significant capital investment . The need for manpower is intermediate and does not require a high qualification. The technological barriers to entry are low and the sector remains quite open to newcomers. The installation of green roofs requires a significant ...
3.3 The different stages of the work
As a first step, especially for the renovation of existing roofs, customers must use a a building engineer who will take measurements to ensure that the building structure can support the weight of a green roof. They must then have the desired type of roof and precise plans designed.
It should ...
4.1 The different types of roofs
Green roofs are adapted to all climates in France.
Their use is very wide and can range from individual garages to warehouses and schools.
The different types of green roofs can be grouped according to their characteristics into four categories.
Extensive roofing This type of roof is similar to a vegetative ...
4.2 Prices of the different products offered
In general, the price of green roofing services has remained fairly stable in France, but the cost of installing a green roof is still one of the main obstacles to its implementation. If the cost of green roofs is higher than * à * times compared to traditional roofs, their lifespan is also about ...
4.3 New types of roofs for new uses
Today, green roofing companies offer a wide range of products and services broader offer of products. There are now some steeply sloping green roofs (***) . Consumers in some cases prefer landscaped and accessible roofs which can play the role of a space of relaxation and relaxation. Some associations or companies are looking ...
5. Regulatory framework
The installation of green roofs complies with the DTU (***).
A decree of July **** aims to prevent the prohibition of urban planning authorities from opposing the implementation of green building projects for façades and roofs through their integration into the Urban Planning Code in Article L***-*-*.
On ** March ****, the ...
The market leaders
Soprema SMAC Derbigum Axter Eco-vegetable Optigreen
Trace The vegetable priory More natural Vertical-tical My Green Roof
Suppliers and nurserymen
Plant workshop Blue Coal Nursery
- Eco Végétal
- Le Prieuré Végétal
- Plus nature
- Mon Toit Vert
- Atelier du végétal
- Pépinière du Chardon bleu
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