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ADVANTAGES AND DISADVANTAGES
OF GREEN SEDUM ROOFS

There are both advantages and disadvantages with sedum roofs. We are convinced, however, that the advantages outweigh the disadvantages. Water retention, increased biodiversity and longer life span of your underlying roofing felt are just some of the many advantages, which you can more about below.

Advantages of green roofs

The advantages are many, but nevertheless, it may be a good idea to consider one or two things before committing yourself to using a sedum roof for your project. Here we have picked out the most important points, which can hopefully help you on your way.

Better well-being from the sight of green roofs

Our sedum roof is a climate-friendly and environmentally sound system solution, which also has a positive effect on our well-being. In recent years the term biophilic design has become more and more widespread. Biophilic design can improve people’s well-being by integrating nature into office environments. Most people, for example, find it more agreeable to have green roofs in their field of vision than black roof surfaces. It reduces stress levels and increases the quality of life and work.

Longer life span for your roofing felt

Green roofs have a long life span. A sedum roof remains attractive year after year, and has a life span of more than 50 years with the correct operation and maintenance. Finally, a green roof has the advantage that it protects the underlying roofing felt from the sun’s decomposing UV rays, which prolongs the felt’s life span.

Water retention

Sedum roofs can absorb large quantities of rainwater, and one of the biggest climatic challenges we are facing is an increasing amount of precipitation. Therefore, a sedum roof can be a good investment for the future, as it is particularly good at retaining water, and a new way of building LRD (localised rainwater drainage) into new construction projects.

Tests show that our 60 mm roof can retain 50% of the rainwater. In the summer the figure is much higher. Thus a green roof from Nature Impact is the sensible and environmentally sound choice for the climate of the future, especially for LRD solutions.

Biodiversity

Growing urbanisation is destroying insects’ habitats, and putting biodiversity under pressure. Insects need green areas, and with a sedum roof, you are establishing a food supply for insects. Several studies also show that sedum roofs have a beneficial effect on the biodiversity in urban environments.

Potential disadvantages

In spite of the many advantages of sedum roofs, there are also, as mentioned, one or two potential disadvantages. We have listed four factors that are worth including in your considerations.

Mounting must be carried out by professionals

As a rule, you cannot mount a sedum roof yourself. It’s best to contact either your local roofer or a carpenter. They know best – so we recommend that you do not attempt to mount a sedum roof yourself.

A sedum roof isn’t always green – and yet

The terms sedum roof and green roof are used interchangeably for living roofs. As a rule, however, a sedum roof is not green all year round, but changes with the seasons. Sedum flowers and is green and lush in spring and summer. In autumn and winter our ordinary sedum roof, Nature Roof, changes colour and becomes reddish, like trees in a forest. If you want a sedum roof that stays green all year round, you should choose our Evergreen Roof, which is made of sedum types that are always green.

Prices of sedum trays

Prices of sedum trays can vary a lot, and naturally depend in particular on the size of the project, as well as mounting costs. We always try to find the best solution in cooperation with our customers, and we also work with competent roofers who are able to carry out the mounting work.  

If you have already installed a roofing felt roof and lay a sedum roof on top, this will prolong the life span of your roofing felt considerably. A sedum roof can therefore be a very good investment and pay for itself in the long term, in spite of the establishment costs.

Less space for solar cells

Many people think that if they choose a sedum roof, there would not be enough roof space left for solar cells. But you can easily have both. Of course, the solar cells will take some space from the sedum roof, but they are actually two good friends. With a sedum roof, your solar cells would not need to use as much energy for cooling, and you would therefore have more effective solar cells.