Installation of Green Roofs

General info installation

ECCOsedum green roof tiles can be placed on a flat and on a sloping roof, but there are two parameters to consider during the installation process:

  1. Prevention of washout or shearing of the substrate
  2. Shearing of the entire green roof system due to the incline of the roof

For the above reasons, there is a limit to the roof incline. Based on the gradient and the corresponding customised roof structure, the following categorisation may be made:

  • Gradient between 0 and 3° (0 to 5%) and gradient exceeding 3° (more than 5%)
    The ECCOsedum system can be placed without any additional precautions.
  • Gradients higher than 15 to 20° (27 to 36%)
    Here, an additional system is installed to prevent the shearing of the substrate layer. Such systems can be divided into two groups (a) systems that reduce the gradient by means of a stepped system (similar to a terrace structure) or (b) systems that divide the substrate layer into compartments by means of a slat system. The distance between adjacent slats is determined by the gradient.
1

INSTALLING THE ROOT-RESISTANT LAYER (ECCO PE400)

Installation of a root-resistant layer on the existing roofing. Depending on the material used for roof waterproofing, it may be necessary to install a root-resistant sheet. A root-resistant sheet is not required in case of EPDM or PVC, unless expressly instructed by the manufacturer. A root-resistant sheet is required in case of asphalt membranes. The root-resistant sheet prevents plant roots from damaging your roof waterproofing. Please consult the manufacturer of your roof waterproofing material.

2

INSTALLING THE ECCOPROTECT 400 PROTECTIVE LAYER

Always observe an overlap of 10 cm when placing the ECCOprotect 400 sheets. In the case of ECCOprotect 400, a non-organic felted cloth is affixed to a woven PP cloth (dimensions 2.1 m x 40 m). This layer consists of a cloth that provides additional protection for the roof membrane against sharp objects. Such objects may damage the cloth during installation. In addition, it provides an additional water buffering layer of approximately 300 ml/m².

3

INSTALLING ECCOSEDUM GREEN ROOF TRAYS

The trays are held together by a click system and are cut using a saw or grinding disc when necessary. The RHP substrate is held together by the roots of the sedum plants. When cutting, do try to keep the water buffering layer intact by cutting only to half height.

Vegetation-free zone

In case of more elevated roofs, we advise against having the ECCOsedum green roof trays reach to the roof edges (vegetation-free zone of +/- 30 cm). This area is then filled with roof gravel, preferably 40 -80 mm.