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Extensive green roof designed to reap the benefits that green roofs offer but at minimal cost and with very little maintenance. A shallow layer of growing medium is used to support low growing, stress-tolerant plants (e.g. sedums) that can generally look after themselves. Their lighter weight makes them suitable for use in both new and refurbishment roof construction.

System components:

  • Rhepanol hg.
  • Verdi-Drain-U.
  • Verdi-Drain25.
  • Verdi-Drain-F.
  • VerdiRoof Extensive.
  • Vegetation.
  • Decorative aggregates.

General information
Specification data
Product Reference

VerdiRoof Extensive Green Roof System

Waterproofing membrane

Rhepanol hg

Protection layer


Drainage layer


Filter membrane


Planting medium -

VerdiRoof Extensive


Insert requirement.


Verdico Sedum Blanket

50–70 mm substrate depth.

Verdico Wildflower Blanket

110 mm substrate depth.

VerdiRoof Hydroplant and Seed

70–90 mm substrate depth.

VerdiRoof HydroSeed/ Seed

90–150 mm substrate depth.

VerdiRoof Sedum Plug Planted

70–90 mm substrate depth.

VerdiRoof Wildflower Plug Planted

90–150 mm substrate depth.

Vegetation barrie

Decorative aggregates

Standard product features

Build-up height:

80–120 mm.


96–190 kg/m².

Waterproofing membrane:

High quality single ply membrane with excellent green credentials, designed especially for green roofs.

Protection layer:

300 g/m² moisture retention layer which also protects the waterproof layer.

Drainage layer:

High capacity reservoir with quick drainage properties made from recycled high density polystyrene. 25 mm deep dual cuspated and perforated.

Filter membrane:

150 g/m² particle fleece separating VerdiRoof growing medium to avoid saturating the rootzone.

Planting medium:

Specialist mineral based plant growing medium consisting of pumice, bark compost and unique carbon capture pellet. Factory blended and stabilized against de-mixing, the substrate provides a high total pore volume balanced with good nutritive substance buffering for exceptional plant germination and growth, while providing carbon negative figure of 7 kg/m³.

Product Options


  • Verdico Sedum Blanket: Mixture of hardy succulents, primarily sedum species supplied in a pre-cultivated blanket (20–25 mm thick), 6–9 species/m² (approximate).
  • Verdico Wildflower Blanket: A mixture of grasses, wildflowers and succulents supplied in a pre-cultivated wildflower turf (>30 mm thick), 9 species/m² (approximate).
  • VerdiRoof Hydroplant and Seed: Sedum cuttings and seed sprayed in a mulch solution), 6–9 species/m² (approximate).
  • VerdiRoof HydroSeed/ Seed: Wildflower seed sprayed in a mulch solution onto a prepared substrate or wildflower seed hand sown onto a prepared substrate, ≤38 species/m².
  • VerdiRoof Sedum Plug Planted: Pre-grown hardy succulents, primarily sedums, installed at a rate of 16–20/m².
  • VerdiRoof Wildflower Plug Planted: Pre-grown wildflowers, grasses, bulbs and hardy succulents, installed at a rate of 16–20/m².