Green roofs

Green roofs are built up as a series of layers, with each performing a specific function. The most typical build-up is shown below and includes:

  • the roof structure (roof deck)
  • waterproofing layer
  • protection layers (including the option of a protection mat and/or root barrier layer)
  • drainage layer
  • filter sheet
  • growing substrate
  • vegetation

  layers of a green roof screen shot

Specialists in green roof design and installation can provide advice on the most suitable system and the most appropriate construction approach.

 View these pages for more on construction and installation of green roofs:

the roof deck
waterproofing layer
protection layers 
drainage layer
filter sheet
growing substrate
vegetation
leak detection systems
thermal insulation
irrigation
greening in windy environments or on a pitched roof
hard landscaping elements