Vegetative cover in Mallorca
A green roof is a constructive installation that has a vegetation cover on top of soil or substrate and is specially conceived to mitigate the effects of urban growth and at the same time as an aesthetic element.
Green roofs help mitigate phenomena such as heat island and the greenhouse effect.
These works help retain rainwater and help reduce air pollution, as the covers act like sponges and trap dust and ash particles while releasing oxygen.
An important fact about roofs is that they ration the energy consumption of buildings. By absorbing heat, plants regulate the internal temperature of the infrastructure.
Frequently Asked Questions
What is a green roof?
It is a planted system installed on a roof or rooftop. It comprises several layers of protection, drainage, filtration, growing medium and vegetation specifically designed for this type of space.
Can a green roof be installed on any building?
Not always. Before installation, the roof’s load-bearing capacity, waterproofing, slopes, drainage outlets and accessibility must be checked.
How much does a green roof weigh?
The weight depends on the chosen system, the depth of the growing medium, the vegetation and the amount of retained water. The saturated weight must therefore always be calculated and the structure checked to ensure that it can support it.
Can a green roof cause damp or leaks?
A well-designed green roof should not cause damp. Sound waterproofing, root protection, suitable drainage and proper water run-off are essential.
Which plants can be used on a green roof?
The choice depends on the depth of the growing medium, sun exposure, wind, irrigation and planned maintenance. Mediterranean species, aromatic plants, succulents and drought-tolerant plants are particularly well suited to Mallorca.
Does a green roof need an irrigation system?
In Mallorca’s climate, automatic irrigation is recommended, especially during the first few months and the driest periods. The amount of water required depends on the type of vegetation and the system used.
What maintenance does a green roof require?
Maintenance may include checking the irrigation system and drainage outlets, removing weeds, pruning and fertilising.
Does a green roof help insulate the building?
Yes. A green roof can help reduce heat build-up on the roof, improve thermal insulation and protect the waterproofing from sunlight and sudden changes in temperature.
Does a green roof retain rainwater?
Yes. The different layers and growing medium can store some of the water and release it gradually, reducing the amount and flow rate of water reaching the drainage outlets.
Can you walk on a green roof?
It depends on the design. Some roofs only allow access for maintenance, while others can include paths, walkable areas or usable spaces, provided that the structure and system are designed for this purpose.
How long does a green roof last?
With correct installation and suitable maintenance, it can have a long service life. The planted layers also help protect the waterproofing from solar radiation and temperature fluctuations.
How much does it cost to install a green roof?
The price depends on the surface area, type of system, depth of the growing medium, vegetation, roof access and the condition of the building. Each project must be assessed before a suitable quote can be prepared.
Does Cultivos Pima deliver the entire green-roof project?
Yes. We can handle the advice, selection of the system and vegetation, irrigation installation, planting and subsequent roof maintenance.

