Smart Green Roof Solution

Through the interview and researches, we find out that the general public has a lot of concerns when implementing their own roof greening projects, e.g. cost, maintenance issue and time constraint etc. In fact, their concerns might be true using the traditional green roof system. However, with more technical researches and plenty of smart green roof system experiments over the world, their concerns can be solved easily by referring to the suitable examples in foreign countries. Below are the highlights of our suggestion.

 

Extensive Modularized System

The shape of roofs in different buildings in Hong Kong varies a lot and the

potential greening area is also influenced in different cases. An extensive modularized

system, in which people place individual small trays on the roof directly, is suugested

to be used. It provides more flexible shapes and does not require

alteration to the building structure.

 

 

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Choice of Plants

A sedum lineare is used because it has a good vitality which enduring to drought and cold weather.

Only twice watering per week is enough for its growth. No prune is needed normally.

 

 

Low Cost & Low Maintenance

There is no alteration to the building structure so that the cost and maintenance keep low. The price can be as low as HKD$13.9 per sq.m when largely produced.[Appendix] The few-layer design of the system emphasizes on simple, only consists of critical layers and materials to reduce the cost.

 

Light Weight

The dry weight traditional green roof ranges from 70 to 170 kg per sq.m, The invention of light tray system can lower it down to 7.6 kg per sq.m by reducing and integrating different layers and replace the traditional soil by a new soil substitute. The new soil substitute is lighter than soil but it is able to perform the soil function in planting. It is different from traditional soil in terms of viscousity, sponginess and water absoring power. 

A lots of Japan company sell these types of soil substitute and we can foresee that it can be produced cheaply when in a large amount production. The mixture is a commercial secret but usually consists of the followings: Yatheaceae, Sewage sluge, Garbage compost, Bagasse, Rice hulls, Sawdust, Coconut fibre, Barks, Peats, Rockwool, Calcined clay, Sand etc.

 

Easy Purchase

Possibly it is so convenient that, the product can be put on store in supermarkets or
convenience stores. Everyone can buy the green roof modules and install it themselves.

 

 

Easy Set-up

The set up process is very easy: buy the module, clear the ground, then place it on the roof.

The modules already contain the drainage layer, all growing materials and the seeds.

Simple watering will activate the seeds as well as the whole system.

 

 

Environmental Friendly

The growing material is natural and organic. The modules can be manufactured from the recycled materials, like the fiber and wood.

 

 

 

Even Better

Use ICT devices to monitor the soil moisture and the growing condition of your green roof

It can help you manage a large green roof and particularly useful for a multi-owned roof.