Slope Greenroofs

Green Roof Installation on Pitched Roofs: What You Need to Know

Installing a green roof on a pitched roof with a slope of more than 15 degrees requires careful planning and execution. There are several factors that influence a successful installation, such as contractor preparation, the use of anti-slip systems and the specific construction of the building. Below you will find everything you need to know to create a green roof on a pitched roof, including the solutions we offer.

Important Considerations for Pitched Roofs

Installing green roofs on slopes requires specific considerations:

Contractor Preparation

1. The building contractor plays a crucial role in the correct preparation of the roof, such as waterproofing and creating a solid base.
2. Anti-slip systems.
3. A vital component to prevent the layers of the green roof from shifting. This must be carried out carefully and according to specifications, with the general contractor responsible for correct installation.
4. Mechanical installation of the anti-slip system
5. Pitch and Construction

The roof pitch and construction determine which systems and techniques are required for stability and durability.

Our Pitched Roof Solutions

1. Topgreen GDP 30: For Pitch from 16° to 30°

The Topgreen GDP 30 system is ideal for slightly pitched roofs. This system offers an efficient and stable solution for residential buildings, industrial halls and office buildings.

Features:
Suitable for pitches from 16° to 30°.
Vapour-open structure for optimum drainage and water management.
Fast and trouble-free installation with the right preparation.
Preparation requirements:
The main contractor must ensure a waterproof roof covering and mechanical fastening of the anti-slip system.

2. Topgreen GDP 45: For Steeper Roofs from 31° to 45°

For steep roofs such as gable roofs, hipped roofs and tent roofs, the Topgreen GDP 45 system is a reliable choice.

Properties:
Suitable for slopes from 31° to 45°.
Robust sedum cassettes ensure stability on steep surfaces.
Resistant to heavy loads and extreme weather conditions.
Preparation requirements:
As with GDP 30, the main contractor must ensure proper waterproofing and a properly installed anti-slip system.

3. Vapour-tight Construction with Ecorasters

The vapour-tight construction starts with a waterproof roof covering, often made of EPDM or bitumen. This system uses eco-rasters that are filled with substrate and finished with sedum mats.

Process:
Prepare waterproof roof covering with raised edges.
Install anti-slip system mechanically (by the contractor).
Glue water-buffer protective cloth to the roof.
Place eco-rasters and fill with substrate.
Finish with sedum mats from Dutch Greenroof.
Why Think About Facilities?

Stability plays a central role in sloping roofs. Without the right provisions, the layers of the green roof can shift or become damaged. Some of the benefits of a well-prepared installation are:

Longer lifespan: A correctly installed green roof lasts longer and retains its functionality.
Safety: Reduces the risk of damage due to shifting layers or leaks.
Environmental friendliness: A well-functioning green roof contributes to biodiversity, water management and thermal insulation.
Contact Us for Tailor-made Advice

The successful installation of a green roof on a sloping roof starts with good preparation and the right choices in systems. Our experts are ready to advise you on the preparation requirements, materials and installation techniques required for your specific project.

With our Topgreen GDP 30, Topgreen GDP 45 and vapour-tight construction with eco-grids, you are assured of a stable, sustainable and aesthetic green roof – regardless of the slope. Ask today about our specific requirements and make your green vision a reality!

* Liability:
Dutch Greenroof or its customers are not responsible for the mechanical installation of the anti-slip system.