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External envelope

The external envelope, including façades, cladding, and weatherproofing, shapes both appearance and performance. These materials vary widely in composition and emissions intensity. Comparing options helps balance thermal efficiency goals with carbon transparency.

Benchmark

Lowest

Highest

AAC reinforced, PowerPanel STD 75 AAC reinforced
AAC reinforced, PowerPanel STD 75 AAC reinforced
Hebel
0.37
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
17%

below benchmark

AAC reinforced, PowerPanel 100 tongue and groove AAC reinforced
AAC reinforced, PowerPanel 100 tongue and groove AAC reinforced
Hebel
0.43
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
5%

below benchmark

AAC reinforced, PowerPanel 200 tongue and groove AAC reinforced
AAC reinforced, PowerPanel 200 tongue and groove AAC reinforced
Hebel
0.44
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
1%

below benchmark

AAC reinforced, PowerPanel 300 tongue and groove AAC reinforced
AAC reinforced, PowerPanel 300 tongue and groove AAC reinforced
Hebel
0.45
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
0%

below benchmark

Primed flatsheets & weatherboards - Classic
Primed flatsheets & weatherboards - Classic
Weathertex Pty Ltd
2.20
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
N/A

benchmark

Primed flatsheets & weatherboards - Selflok
Primed flatsheets & weatherboards - Selflok
Weathertex Pty Ltd
2.20
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
N/A

benchmark

Primed flatsheets & weatherboards - Shingles/Rubix
Primed flatsheets & weatherboards - Shingles/Rubix
Weathertex Pty Ltd
2.20
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
N/A

benchmark

Primed flatsheets & weatherboards - Weathergroove
Primed flatsheets & weatherboards - Weathergroove
Weathertex Pty Ltd
2.20
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
N/A

benchmark

Primelok 170mm
Primelok 170mm
Weathertex Pty Ltd
2.30
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
N/A

benchmark

Primelok 200mm
Primelok 200mm
Weathertex Pty Ltd
2.30
Upfront Carbon Emissions
kg CO2e / kg (A1-A3)
N/A

benchmark

Cladding Hardie™ Flex Eaves Lining 4.5mm
Cladding Hardie™ Flex Eaves Lining 4.5mm
James Hardie
4.50
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
64%

below benchmark

Cladding Hardie™ Flex Sheet 4.5mm
Cladding Hardie™ Flex Sheet 4.5mm
James Hardie
4.62
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
63%

below benchmark

Fibre Cement Cladding Sheet - 4.5mm
Fibre Cement Cladding Sheet - 4.5mm
CSR Building Products Limited
5.70
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
55%

below benchmark

Fibre Cement Cladding Sheet - 6mm
Fibre Cement Cladding Sheet - 6mm
CSR Building Products Limited
6.40
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
49%

below benchmark

Cladding Hardie™ Flex Sheet 6mm
Cladding Hardie™ Flex Sheet 6mm
James Hardie
6.62
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
47%

below benchmark

Cladding Hardie™ Plank Weatherboards 7.5mm
Cladding Hardie™ Plank Weatherboards 7.5mm
James Hardie
6.86
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
46%

below benchmark

Cladding Hardie™ Fine Texture Cladding 8.5mm
Cladding Hardie™ Fine Texture Cladding 8.5mm
James Hardie
7.51
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
40%

below benchmark

Cladding EasyLap™ Panel 8.5mm
Cladding EasyLap™ Panel 8.5mm
James Hardie
8.00
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
37%

below benchmark

SimpleLine Cladding - 8.5mm
SimpleLine Cladding - 8.5mm
CSR Building Products Limited
8.00
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
N/A

benchmark

ZINCALUME® steel in 0.30mm base material thickness
ZINCALUME® steel in 0.30mm base material thickness
Bluescope
8.40
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
56%

below benchmark

Cladding Matrix™ Cladding 8mm
Cladding Matrix™ Cladding 8mm
James Hardie
8.71
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
31%

below benchmark

ZINCALUME® steel in 0.30mm base material thickness (BMT) incl. rollforming
ZINCALUME® steel in 0.30mm base material thickness (BMT) incl. rollforming
Bluescope
8.73
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
54%

below benchmark

ZINCALUME® steel in 0.35mm base material thickness
ZINCALUME® steel in 0.35mm base material thickness
Bluescope
9.43
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
51%

below benchmark

COLORBOND® steel in 0.30mm base metal thickness
COLORBOND® steel in 0.30mm base metal thickness
Bluescope
9.49
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
36%

below benchmark

ZINCALUME® steel in 0.35mm base material thickness (BMT) incl. rollforming
ZINCALUME® steel in 0.35mm base material thickness (BMT) incl. rollforming
Bluescope
9.80
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
49%

below benchmark

GALVABOND® steel with a zinc coating class of Z100 in 0.37mm base metal thickness
GALVABOND® steel with a zinc coating class of Z100 in 0.37mm base metal thickness
Bluescope
9.81
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
49%

below benchmark

COLORBOND® steel in 0.30mm base metal thickness (BMT) incl. rollforming
COLORBOND® steel in 0.30mm base metal thickness (BMT) incl. rollforming
Bluescope
9.84
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
34%

below benchmark

Cladding PrimeLine™ Weatherboards 9mm
Cladding PrimeLine™ Weatherboards 9mm
James Hardie
9.85
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
22%

below benchmark

ZINCALUME® steel in 0.38mm base material thickness
ZINCALUME® steel in 0.38mm base material thickness
Bluescope
10.00
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
48%

below benchmark

GALVABOND® steel with a zinc coating class of Z100 in 0.40mm base metal thickness
GALVABOND® steel with a zinc coating class of Z100 in 0.40mm base metal thickness
Bluescope
10.40
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
46%

below benchmark

ZINCALUME® steel in 0.38mm base material thickness (BMT) incl. rollforming
ZINCALUME® steel in 0.38mm base material thickness (BMT) incl. rollforming
Bluescope
10.40
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
46%

below benchmark

COLORBOND® steel in 0.35mm base metal thickness
COLORBOND® steel in 0.35mm base metal thickness
Bluescope
10.50
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
29%

below benchmark

ZINCALUME® steel in 0.40mm base material thickness
ZINCALUME® steel in 0.40mm base material thickness
Bluescope
10.50
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
45%

below benchmark

GALVABOND® steel with a zinc coating class of Z200 in 0.40mm base metal thickness
GALVABOND® steel with a zinc coating class of Z200 in 0.40mm base metal thickness
Bluescope
10.60
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
45%

below benchmark

Barestone Original - 9mm
Barestone Original - 9mm
CSR Building Products Limited
10.80
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
14%

below benchmark

ExpressPanel - 9mm
ExpressPanel - 9mm
CSR Building Products Limited
10.80
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
N/A

benchmark

COLORBOND® steel in 0.35mm base metal thickness (BMT) incl. rollforming
COLORBOND® steel in 0.35mm base metal thickness (BMT) incl. rollforming
Bluescope
10.90
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
26%

below benchmark

ZINCALUME® steel in 0.40mm base material thickness (BMT) incl. rollforming
ZINCALUME® steel in 0.40mm base material thickness (BMT) incl. rollforming
Bluescope
10.90
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
43%

below benchmark

ZINCALUME® steel in 0.42mm base material thickness
ZINCALUME® steel in 0.42mm base material thickness
Bluescope
10.90
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
43%

below benchmark

ZINCALUME® steel in 0.42mm base material thickness (BMT) incl. rollforming
ZINCALUME® steel in 0.42mm base material thickness (BMT) incl. rollforming
Bluescope
11.30
Upfront Carbon Emissions
kg CO2e / m2 (A1-A3)
41%

below benchmark

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