There are three types of green roofs - extensive, intensive and biodiverse.

Extensive Green Roofs

Extensive Green Roofing systems consist of lightweight, naturalistic planting that provides extensive plant cover with minimal maintenance and a wide range of benefits, including:


  • Little modification of the roof environment, ensuring suitability for new or refurbishment applications.
  • Naturalistic style planting systems, that require minimal care, irrigation and maintenance.
  • A thin layer of lightweight growing mediums, typically between 65mm and 150mm.
  • A wide range of grass, herbaceous, succulent and moss species, that establish self-sustaining plant communities.
  • Suitability for use on roof slopes (from 0 to 35° slope), with measures possibly needed above 5° Pitches greater than 35° may be accommodated subject to design.


Typically weighing 80 to 90 kg m². (saturated system weight) lighter variations can be specified, but the membrane will require independent attachment.

Intensive Green Roofs

Intensive Green Roofing Systems are planted areas generally consisting of perennials, shrubs, trees and/or turf, effectively creating a traditional English garden at roof level.

 

Generally laid out in sections to include usable areas of terraces and paths, alternating with intensively planted areas and planters, these systems require the consideration of many different criteria, including:

 

- Frost hardiness of plants
- Resistance to damage by wind
- Growth rate
- Compatibility/competition with other plants
- Resistance to extreme climatic conditions
- Resistance to pests and diseases, which may be prevalent under these extreme conditions

 

Similarly, an Intensive system will require intensive care, irrigation and long term maintenance. This will include weeding and removal of unwanted vegetation, cutting and trimming of plants and preventative measures to protect plants against pests and diseases.

Biodiverse Green Roofs

A Biodiverse Green Roofing system is designed to enhance the specific requirements of local flora and fauna. As such, its construction above the Sarnafil membrane level is dependent on the client’s environmental objectives and any local planning constraints. The benefits of a biodiverse green roof include:


  • Little modification of the roof environment, ensuring the suitability for new or refurbishment applications.
  • Natural self-sustaining plant communities that require minimal care, irrigation and maintenance.
  • A thin layer of lightweight growing mediums, typically between 65mm and 150mm.
  • Suitability for use on roof slopes (from 0 to 35° slope), with measures possibly needed above 5°, pitches greater than 35° may be accommodated subject to design.

G410-EL

Sarnafil G410-EL is a multi-layer, synthetic roof waterproofing sheet based on premium-quality polyvinyl chloride (PVC) with inlay of glass non-woven containing ultraviolet light stabilizers and flame retardants. Sarnafil G410-EL is a hot air weldable roof membrane, formulated for direct exposure and designed to use in all global climatic conditions. Sarnafil G410-EL is produced with an integral glass non-woven carrier for dimensional stability.


Sarnafil G410-EL is the Sarnafil roof membrane which can be used for Ballasted membrane systems. Sarnafil G410-EL has a unique lacquer coating applied to the top of the membrane to resist staining from airborne dirt and pollutants. Sarnafil G410-EL has no built-in stress at the time of production and has a fully encapsulated carrier with no risk to delamination or water-wicking. The dimensional stability of Sarnafil G410-EL is excellent. Sarnafil G 410-EL is available in a variety of colours and thicknesses.


Product Data Sheets

G410-12EL - 1.2mm thick

G410-15EL - 1.5mm thick

G410-18EL - 1.8mm thick

G410-20EL - 2.0mm thick


Declaration Of Performance

G410-12EL - 1.2mm thick

G410-15EL - 1.5mm thick

G410-18EL - 1.8mm thick

G410-20EL - 2.0mm thick

Green Roof System
  • Extensive green roof vegetation (by specialist)
  • Extensive planting medium (by specialist)
  • Cuspated PUR foam drainage board (by specialist)
  • Sarnafil G445-13 protection layer
  • Sarnafil G410-EL waterproof covering
  • SarnaTherm G insulation
  • Sarnavap 5000E SA vapour control layer

 

 

Green Roof System
  • Extensive green roof vegetation (by specialist)
  • Extensive planting medium (by specialist)
  • Recycled High Density Polyethylene drainage board (by specialist)
  • Sarnafil G445-13 protection layer
  • Sarnafil G410-EL waterproof covering
  • SarnaTherm G insulation
  • Sarnavap 5000E SA vapour control layer

G476-SA Membrane

Sarnafil G476-SA is a self-adhered synthetic roof waterproofing sheet consisting of a reinforced thermoplastic waterproofing membrane and a foam backing, coated with a pressure-sensitive adhesive that can be applied directly to a concrete substrate or other approved substrates in inverted ballasted and green roof systems.

 

Sarnafil®G476-SA is based on premium-quality polyvinyl chloride (PVC) with an inlay of glass non-woven.  It is a hot air weldable roof membrane, formulated with a special foam backing designed to prevent water tracking and coated with a pressure sensitive adhesive allowing for rapid installation.


Product Data Sheet

G476-SA

 

Declaration Of Performance

G476-SA

Below Ground Waterproofing?

Do you require below ground waterproofing solutions? Click here to visit the Sika Waterproofing Solutions website