Extensive green roofs.

Extensive sedum roof.

An extensive green roof often has a growth layer of 50 to 100mm, upon which only drought-resistant plants can plant, e.g. succulents, bulbs, and mosses.

The weight of the sedum covering is approximately 50kg/m2 in its water-saturated state.

Mosses and sedum vegetation usually require no root-securing membranes, as these plant’s roots are harmless to conventional membranes. An inspection of the roof must ensure that there is no vegetation with strong, deep roots.

Literature:

• Icopal green roofs.
• Protein roofing foil on green roofs.

For documentation, please refer to the distributors of green roof products:

• Veg Tech A/S.
• ZinCo Danmark I/S.
• Protan A/S.
• Trelleborg Phønix.
• Icopal.
• By gross.