Technical
Classification		 Roof Garden (Intensive Green Roof) Extensive Green Roof
Overview Sky Gardens Green Roofs are installed primarily as an amenity Roof Garden.  They are heavier than G-SKY Green Roofs, but lighter than any other Roof Garden System available.  Their degree of maintenance depends on the plant selection and owners upkeep requirements.

Roof Garden
Most general gardening can be done, however the plant selection is slightly limited by the harsher conditions and altitude.

Sky Gardens Primary Features are:
  • Root Guard™ - The world's only tested and proven Root Resistance System
  • GR Drain 20 - Drainage, Water Retention and Aeration Layer designed to support Live-Loads
  • Roof Soil™ - Natural Organic Lightweight Soil.  Delivers Twice the Growth and Lasts Twice as Long as Ordinary Lightweight Growing Mixes - Soil Depths of 150mm (6") +
 G-SKY Green Roofs are installed primarily for their environmental and aesthetic benefits.  They are lightweight and easy to maintain. 

The degree of freedom is limited by a thinner soil depth, which limits plant selection. 

G-SKY Extensive Green Roof Features are:
  • Root Guard™ E - The world's only tested and proven Root Resistance System
  • G-SKY Drain - Drainage, Water Retention and Aeration Layer designed to resist high-winds and secure netting over plants.
  • Roof Soil™ 2 for Thin Applications - Natural Organic Lightweight Soil.  Delivers Twice the Growth and Lasts Twice as Long as Ordinary Lightweight Growing Mixes - Soil Depths of 30 to 100mm (1~4")
  • Very Low-maintenance
Total Thickness Sky Garden System :  30mm (1-1/8")
 Roof Soil™ : 150mm+ (6"+)
Total: 180mm+ (7-1/8"+)		 60~130mm
(2-3/8" ~ 5-1/8")
Total System Weight Sky Garden System: 5kg/m² (1lb/ft²)
Roof Soil™: 120kg/m² (24.6lb/ft²)
 Total: 125kg/m² (~25.6/lb/ft²)		 48 ~ 104kg/m²
(9.8lb/ft² ~ 21.3lb/ft²)
Installed
Cost		 $250 ~ $450/m² ($23~42/ft²) $130 ~ $215/m² ($12~20/ft²)
Maintenance Requirements Frequent maintenance is required.
6 ~ 12 visits per year for lawns, shrubs and low trees.		 G-SKY Sedum Plants:
3 visits/year

G-SKY Grand Plants:
4~6 visits/year
Design
Freedom		 High Low
Plant Selection Freedom Depending on the depth of the soil, almost limitless Limited to G-SKY Sedum Plants, G-SKY Grand Plants and other low-growing, drought-tolerant perennial plants.
System
Diagram

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