D
e
p
t
h
Soil 30mm
(1-3/16")
30mm
(1-3/16")
30mm
(1-3/16")
100mm
(3-15/16")
150mm
(5-7/8")
200mm
(7-7/8")
300mm
(11-13/16")
400mm
(15-3/4")
Mulch 20mm
(3/4")
20mm
(3/4")
20mm
(3/4")
20mm
(3/4")
<40mm
(<1-9/16")
<40mm
(<1-9/16")
<40mm
(<1-9/16")
<40mm
(<1-9/16")
System
Specification ID
G-SKY-T B.I.P. 2" Hi-Wind
(G-SKY-N)
B.I.P. 2"
(G-SKY-L)
B.I.P. 4"
(G-SKY-L 100)
GR-S Systems
P
l
a
n
t

O
p
t
i
o
n
s
G-SKY Sedum Plants (*1) Excellent Excellent Excellent Good Good Good Good Good
G-SKY Grand Plants (*2) Not Suitable Livingstone Daisy &
Matted Saxifrage
Excellent Excellent Excellent Excellent Excellent
Sky Garden Grand Plants (*3) Not Suitable Not Suitable Not Suitable Not Suitable Excellent Excellent Excellent Excellent
Lawn Not Suitable Not Suitable Not Suitable Not Suitable Excellent Excellent Excellent Excellent
Low Trees
& Shrubs (*4)
(<0.9m, 36")
Not Suitable Not Suitable Not Suitable Not Suitable Not Suitable Excellent Excellent Excellent
Medium Trees (*5)
(1~3m, 3'~10')
Not Suitable Not Suitable Not Suitable Not Suitable Not Suitable Not Suitable Excellent Excellent
Tall Trees
(*6)
(3~4m, 10'~13')
Not Suitable Not Suitable Not Suitable Not Suitable Not Suitable Not Suitable Not Suitable Excellent
Green Roof's
Primary Purpose
Environmental Consideration, Energy Savings, Improved View Environmental Consideration, Energy Savings, View Improvement, Accessible Amenity Garden, Flower Beds, Vegetable Garden, etc.
Irrigation Requirements All areas larger than 300m² (3,229ft²) should have an automated irrigation system installed. An automated irrigation is always required.
(watering can be performed by hand for small areas, i.e. flower beds, etc)
Sloped Roofs Allowances 1/100 ~
3/10
1/100 ~
3/10
1/100 ~
1/12
1/100 ~
1/12
1/100 ~
1/12
1/100 ~ 1/12
(slopes of up to 3/10 when additional soil support)
1/100 ~
1/12
1/100 ~
1/12
Maintenance Grade
1
Grade
1
Grade
1
Grade
2 ~ 3
Grade
3 ~ 4
Grade
3 ~ 4
Grade
3 ~ 4
Grade
3 ~ 4
W
e
i
g
h
t

kg
/
Roof
Soil
Sys-
tem
Soil 24
Mulch 20
System 9
Soil 24
Mulch 20
System 5
Soil 24
Mulch 20
System 4
Soil 80
Mulch 20
System 4
Soil 120
System 8
Soil 160
System 8
Soil 240
System 8
Soil 320
System 8
Total 53
(10.9lb/ft²)
49
(10lb/ft²)
48
(9.8lb/ft²)
104
(21.3lb/ft²)
128
(26.2lb/ft²)
168
(34.4lb/ft²)
248
(50.8lb/ft²)
328
(67.2lb/ft²)
Natural Soil (*8) - - - - - 360
(73.8lb/ft²)
540
(110.6lb/ft²)
720
(147.5lb/ft²)
Accessible
Roof Garden
Bed of Sedum Plants Bed of Sedum Plants Bed of Sedum Plants Bed of Sedum Plants & Grand Plants Lawn, with complete Flower Beds & Shrubs Lawn, with complete Flower Beds, Shrubs & Low-Trees Lawn, with complete Flower Beds, Shrubs & Low to Mid Trees Lawn, with complete Flower Beds, Shrubs & Low to Tall Trees
Vegetable Garden Not Suitable Not Suitable Not Suitable Few Vine Vegetables (Peas, etc.) Few Vine Vegetables (Peas, etc.) Vine Vegetables (Tomatoes, Cucumbers, etc.) Vine Vegetables (Tomatoes, Cucumbers, etc.) Root Vegetables (Potatoes, Onions, etc.)
Accessible Lawn Not Suitable Not Suitable Possible with GR Irrigation Techline CV Suitable Excellent Excellent Excellent Excellent
Environmental Benefit High High High High Mid Mid Mid Mid
Cost Mid Low Low Mid Mid ~ High Mid ~ High High High
Maintenance Low Low Low Mid ~ High High High High ~ Very High Very High
  
M
e
m
b
r
a
n
e
s
Inverted Assembly Possible
(Insulation must be adhered)
Possible
(Insulation must be adhered)
Possible Possible Possible Possible Possible Possible
Root Barrier Root
Guard™ E
Root
Guard™ E
Root
Guard™ E
Root
Guard™ E
Root Guard™
C or H
(GR Film optional)
Root Guard™
C or H
(GR Film optional)
Root Guard™ C or H
(GR Film optional)
Root Guard™ C or H
(GR Film optional)
Suitable
 Membranes
2-ply SBS Asphalt
Fully adhered

PVC or TPO Fully Adhered

FRP Liquid Applied
2-ply SBS Asphalt
Fully adhered

PVC or TPO Fully Adhered

FRP Liquid Applied
2-ply SBS Asphalt
Fully adhered

PVC or TPO Fully Adhered

FRP Liquid Applied
2-ply SBS Asphalt
Fully adhered

PVC or TPO Fully Adhered

FRP Liquid Applied
Multi-ply
(Modified)
Asphalt
Fully adhered

FRP Liquid Applied
Multi-ply
(Modified)
Asphalt
Fully adhered

FRP Liquid Applied
Multi-ply
(Modified)
Asphalt
Fully adhered

FRP Liquid Applied
Multi-ply
(Modified)
Asphalt
Fully adhered

FRP Liquid Applied
Membranes
that
should be
avoided
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF
Single-ply
Thermoset

SPF

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