GREEN ROOF CONSTRUCTION

A green roof is a roof that is covered with vegetation. Selecting a vegetation type combines the practical with the enjoyable. Green roof constructions improve the heat and noise insulation of a building structure, have an air purifying effect, catch rainwater and discharge it at a delayed rate, enhance the area’s biodiversity and have added aesthetic value.

HERTALAN® EPDM GREEN ROOF CONSTRUCTION

HERTALAN® EPDM membranes are resistant to root penetration and feature an FLL hallmark which includes both our hot-bonding seam and hot air seam.

The EPDM system can be fitted as a membrane (fewer seams during installing, resulting in a reduced risk of leaks), will generally exceed the life span of the vegetation layer. HERTALAN® EPDM green roof construction is the most environmentally friendly choice for being installed as a waterproof layer under a roof vegetation.

HERTALAN® EPDM roofing systems can be used for any type of green roof, intensive or extensive.

EXTENSIVE GREEN ROOFS

Extensive green roof vegetation is a natural form of vegetation that calls for little maintenance. It includes the planting of various sedum varieties, herbs and certain types of grass. The construction height can therefore be limited to about 10 to 12 cm. This limited construction height restricts the weight of the green roof vegetation. Approximately 15 kg/m2 is calculated for each cm of construction height. This type of roof vegetation has been designed especially for roofs that are not easily accessible and can bear only a limited amount of weight.

INTENSIVE GREEN ROOFS

Intensive green roofs are generally also used for recreation (and in some cases parking).They are ‘living roofs’ consisting of perennial plants, trees and paths. These roofs set stringent requirements for the structure of the roof covering and the roof growth. The minimum weight of 300 kg/m2 and a minimum building height of 20cm mean that this type of green roof can be used only if this has been taken into account at the design stage.

TEST REPORT: RESISTANCE AGAINST ROOT PENETRATION

By commission of Carlisle® Construction Materials bv the Institute of Horticulture, University of Applied Sciences Weihenstephan has tested our HERTALAN® EPDM roofing products. In this intensive, 2 year during test, the resistance to root damage of the flexible sheets hertalan easy cover and hertalan easy weld was determined.