Construction Requirements BAL-40 Building Codes & Rules

- Comply with Bushfire Construction Requirements with Tools™: BAL-40 requirements, fire danger insights, & detailed guidance for walls, roof, guttering & more!

AS 3959:2018, 3.2.1

Wall & Openings Fire Separated from Garage^{AS 3959:2018, 3.2.1}

Only if the attached Garage is not constructed to BAL requirements

Bushfire shutter (optional)

Garage door

AS 3959:2018, 3.2.3 (a)

> 6m^{AS 3959:2018, 3.2.3 (a)}

NSW RFS 2019 PBP, 7.6

Fencing

< 6m from Building to be non-combustible^{NSW RFS 2019 PBP, 7.6}

AS 3959:2018, 3.2.1 (a)

-/60/60 FRL^{AS 3959:2018, 3.2.1 (a)}

Wall

AS 3959:2018, 3.2.1 (a)

-/60/30 FRL^{AS 3959:2018, 3.2.1 (a)}

Self-closing

Fire Door

AS 3959:2018, 3.2.1 (a)

-/60/- FRL^{AS 3959:2018, 3.2.1 (a)}

Permanently Closed

Window

Services

Metal for Plumbing above ground^[1]
Power lines to be buried^[2]

Utility Service RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

NSW RFS 2019 PBP, 5.3.3

NSW RFS 2019 PBP, 7.4

NSW RFS 2019 PBP, 5.3.3

NSW RFS 2019 PBP, 7.4

AS 3959:2018, 8.8

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{NSW RFS 2019 PBP, 5.3.3NSW RFS 2019 PBP, 7.4}
Water Supply^{NSW RFS 2019 PBP, 5.3.3}
Metal above-ground Water Pipes, Taps, Storage Tank
Fire Hydrants prohibited on road carriageway
Gas Services^{NSW RFS 2019 PBP, 7.4}
Steel or Copper above-ground Gas Pipes
≥ 900mm Wall thickness (follow local gas provider rules or whichever is greater)
≥ 400mm extension inside the building
≥ 100mm underground extension
Refer to local Gas regulations for additional information
Bottled Gas Installation^{AS 3959:2018, 8.8AS 3959:2018, 8.8}
Shield or locate away from building
Away from flammable materials
Connections are made of Metal
Polymer-sheated flexible gas supply lines are prohibited
Electricity Services^{NCC 2022 Vol 1, G5D1NCC 2022 Vol 2, H7D4}
Power lines to be buried
Overhead lines
≥ 30m Pole spacing
Refer to ISSC3 for Managing Vegetation near Power lines

AS 3959:2018, 8.8

NSW RFS 2019 PBP, 5.3.3

Metal for Plumbing above ground^{AS 3959:2018, 8.8}
Power lines to be buried^{NSW RFS 2019 PBP, 5.3.3}

Fire Door

Garage & Carport Under

All elements to BAL-40 Rules^[1], or
Fire separated

Fire Wall RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.2.2 (a)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

AS 3959:2018, 3.2.2

AS 3959:2018, 3.2.2 (b)

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959^{AS 3959:2018, 3.2.2 (a)NCC 2022 Vol 1, G5D1}
Walls, Ceilings, Floors, Structure & Openings to BAL-40 rules^{NCC 2022 Vol 2, H7D4}, or
Separate from the main building with^{AS 3959:2018, 3.2.2}
60/60/60 Structure tested from Outside
-/60/60 Walls & ceiling / floor above, or
≥ 90mm thk Masonry or Earth Walls^{AS 3959:2018, 3.2.2 (b)}
-/60/30 Self-closing fire door
-/60/- Permanently closed fire window

AS 3959:2018, 3.2.2 (a)

All elements to BAL-40 Rules^{AS 3959:2018, 3.2.2 (a)}, or
Fire separated

Skylights

≤ 18° Roof pitch for exterior glazing^[1]
-/30/- FRL for glazed assemblies^[2]
Corrosion-resistant Steel or Bronze Frames^[3]
Non-combustible sealant & conduit for penetrations^[4][5]

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

Skylight RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.5 (b)

AS 3959:2018, 8.6.5 (c)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.5 (b)AS 3959:2018, 8.6.5 (c)}
-/30/- FRL glazed assemblies^{AS 3959:2018, 8.6.5 (c)}
≤ 18° Roof Pitch^{AS 3959:2018, 8.6.5 (c)}
Use Steel or Bronze Frames to resist corrosion^{NCC 2022 Vol 1, G5D1}
Ventilation openings to be screened^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.6.5 (c)

AS 3959:2018, 8.6.5 (a)

AS 3959:2018, 8.6.5 (d)

AS 3959:2018, 8.6.5 (b)

≤ 18° Roof pitch for exterior glazing^{AS 3959:2018, 8.6.5 (c)}
-/30/- FRL for glazed assemblies^{AS 3959:2018, 8.6.5 (c)}
Corrosion-resistant Steel or Bronze Frames^{AS 3959:2018, 8.6.5 (a)}
Non-combustible sealant & conduit for penetrations^{AS 3959:2018, 8.6.5 (d)AS 3959:2018, 8.6.5 (b)}

Floor & Balcony

Use non-combustible materials if unenclosed^[1]

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

Wall Construction RULES

NCC 2022 V4

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.4.1 (a)

AS 3959:2018, 8.4.1 (b) (i)

AS 3959:2018, 8.4.1 (c)

NSW RFS 2019 PBP, 7.5.4

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.4.1 (a)AS 3959:2018, 8.4.1 (b) (i)}
Exterior exposed
≥ 90mm thk non-combustible Masonry or Masonry Veneer Wall^{AS 3959:2018, 8.4.1 (c)}
Leaf of Clay, Blockwork, Stone, Concrete, AAC, Earth, or
≥ 9mm Fibre-cement or Steel frames^{NSW RFS 2019 PBP, 7.5.4}, or
Framing to AS 1530.8.1^{NCC 2022 Vol 1, G5D1}
NSW^{NCC 2022 Vol 2, H7D4}
No items placed on the Wall that produce flaming, eg.
Light fittings
House numbers

NSW RFS 2019 PBP, 7.4

Use non-combustible materials if unenclosed^{NSW RFS 2019 PBP, 7.4}

Verandah or Awning Roof

Roof Space component^[1]
Follow Main Roof requirements
As a separate feature^[2]
Covering materials to be non-combustible
Combustible elements to be lined with^[3]
≥ 6mm Fibre-cement or
AS 1530.8.1 compliant material

Tiled Roof RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.2

AS 3959:2018, 8.6.2 (b)

AS 3959:2018, 8.6.2 (a)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.2AS 3959:2018, 8.6.2 (b)}
Roof to be entirely sarked, installed over Roof Frame, including^{AS 3959:2018, 8.6.2 (b)}
Ridges^{AS 3959:2018, 8.6.2 (a)}
Hips^{NCC 2022 Vol 1, G5D1}
Turned up into Gutters, & Valleys
Battens can be installed on top of the Sarking^{NCC 2022 Vol 2, H7D4}

Metal Sheet Roof RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.3 (a)

AS 3959:2018, 8.6.3 (b)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.3 (a)AS 3959:2018, 8.6.3 (b)}
Roofs entirely sarked, except^{NCC 2022 Vol 1, G5D1}
If with Insulation with foil underneath blankets allowed over Battens
Gaps sealed at Edges, Hips, & Ridges with^{NCC 2022 Vol 2, H7D4}
Mesh or perforated sheet screened
Mineral Wool
Non-combustible materials

External Roofing RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.4 (a)

AS 3959:2018, 8.6.4

AS 3959:2018, 8.6.4 (b) (ii)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.4 (a)AS 3959:2018, 8.6.4}
Part of Main Roof space component^{AS 3959:2018, 8.6.4 (b) (ii)}
To follow Main Roof requirements
As a separate feature & partitioned by BAL-40 compliant Wall^{NCC 2022 Vol 1, G5D1}
Covering materials to be non-combustible
Timber Rafter with^{NCC 2022 Vol 2, H7D4}
≥ 6mm thk Fibre-cement underside sheeting

Post RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.7.5

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.7.5NCC 2022 Vol 1, G5D1}
Non-combustible materials^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.6.4 (a)

AS 3959:2018, 8.6.4 (b)

AS 3959:2018, 8.6.4 (b) (ii)

Roof Space component^{AS 3959:2018, 8.6.4 (a)}
Follow Main Roof requirements
As a separate feature^{AS 3959:2018, 8.6.4 (b)}
Covering materials to be non-combustible
Combustible elements to be lined with^{AS 3959:2018, 8.6.4 (b) (ii)}
≥ 6mm Fibre-cement or
AS 1530.8.1 compliant material

Fire-stopping Penetrations

Garage Doors

Non-combustible materials^[1]
≤ 5 Flammability Index to seals^[2]
Ventilation Slots are prohibited^[3]

Garage Doors RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.5.6 (a)

AS 3959:2018, 8.5.6 (c)

AS 3959:2018, 8.5.6 (e)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.5.6 (a)AS 3959:2018, 8.5.6 (c)}
Materials to be non-combustible^{AS 3959:2018, 8.5.6 (e)}
Cover minor combustible Door parts with combustion-resistant Door elements
Fitted with Guide Tracks, Weather Strips, Seals & Brushes^{NCC 2022 Vol 1, G5D1}
≤ 5 Flammability Index
Ventilation slots are prohibited^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.5.6 (a)

AS 3959:2018, 8.5.6 (c)

AS 3959:2018, 8.5.6 (e)

Non-combustible materials^{AS 3959:2018, 8.5.6 (a)}
≤ 5 Flammability Index to seals^{AS 3959:2018, 8.5.6 (c)}
Ventilation Slots are prohibited^{AS 3959:2018, 8.5.6 (e)}

Walls

Non-combustible materials^[1]
Seal or screen all openings^[2]

Jointing RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.4.2

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.4.2NCC 2022 Vol 1, G5D1}
External Wall joints requires complete closure by^{NCC 2022 Vol 2, H7D4}
Seal
Cover
Overlap
Back or Butt-jointed

Wall Construction RULES

NCC 2022 V4

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.4.1 (a)

AS 3959:2018, 8.4.1 (b) (i)

AS 3959:2018, 8.4.1 (c)

NSW RFS 2019 PBP, 7.5.4

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.4.1 (a)AS 3959:2018, 8.4.1 (b) (i)}
Exterior exposed
≥ 90mm thk non-combustible Masonry or Masonry Veneer Wall^{AS 3959:2018, 8.4.1 (c)}
Leaf of Clay, Blockwork, Stone, Concrete, AAC, Earth, or
≥ 9mm Fibre-cement or Steel frames^{NSW RFS 2019 PBP, 7.5.4}, or
Framing to AS 1530.8.1^{NCC 2022 Vol 1, G5D1}
NSW^{NCC 2022 Vol 2, H7D4}
No items placed on the Wall that produce flaming, eg.
Light fittings
House numbers

Vent & Weepholes RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.4.3

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.4.3NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.4.1 (a)

AS 3959:2018, 8.4.3

Non-combustible materials^{AS 3959:2018, 8.4.1 (a)}
Seal or screen all openings^{AS 3959:2018, 8.4.3}

Windows & Glazed Doors

≥ 6mm Toughened Glazing^[1]
≤ 5 Flammability Index to seals^[2]
Fixed & operable parts to be screened^[3]

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

Window RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.5.3 (b) (iii)

AS 3959:2018, 8.5.3 (b) (iv)

AS 3959:2018, 8.5.3 (b) (v)

AS 3959:2018, 8.5.3 (b) (i)

AS 3959:2018, 8.5.3 (b) (ii)

AS 3959:2018, 8.5.3 (a)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.5.3 (b) (iii)AS 3959:2018, 8.5.3 (b) (iv)}
Glazing^{AS 3959:2018, 8.5.3 (b) (v)}
≥ 6mm thk Toughened Glass, or
Glass Blocks
≤ 5mm Flammability Index for Seals to all openable panels^{AS 3959:2018, 8.5.3 (b) (i)}
Screens^{AS 3959:2018, 8.5.3 (b) (ii)}
Operable & fixed Windows require external Screens
External hardware & frames to be Metal^{AS 3959:2018, 8.5.3 (a)NCC 2022 Vol 1, G5D1}
No requirements on window if^{NCC 2022 Vol 2, H7D4}
Protected by a Bushfire Shutter

AS 3959:2018, 8.5.3 (b) (iii)

AS 3959:2018, 8.5.3 (b) (iv)

AS 3959:2018, 8.5.3 (b) (v)

≥ 6mm Toughened Glazing^{AS 3959:2018, 8.5.3 (b) (iii)}
≤ 5 Flammability Index to seals^{AS 3959:2018, 8.5.3 (b) (iv)}
Fixed & operable parts to be screened^{AS 3959:2018, 8.5.3 (b) (v)}

Detached Structure

> 6m separation^[1], or
Same Fire-resisting construction^[2] , or
Main Building protected by
≥ –/60/60 FRL Non-loadbearing Wall^[3]
≥ 60/60/60 FRL Loadbearing Wall^[4]
–/60/30 FRL Self-closing Fire Door^[5]
–/60/– FRL permanently closed Window^[6]

Detached Structure RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.2.3 (a)

AS 3959:2018, 3.2.3 (b)

AS 3959:2018, 3.2.3 (b) (i)

AS 3959:2018, 3.2.3 (b) (ii)

AS 3959:2018, 3.2.3 (c)

AS 3959:2018, 3.2.3 (b) (ii)

AS 3959:2018, 3.2.3 (b) (iii)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.2.3 (a)AS 3959:2018, 3.2.3 (b)}
Same Fire-resisting construction as the Main Building
Structure to be separated from Main Building by
≥ 6m away, horizontally^{AS 3959:2018, 3.2.3 (b)}
Openings protected by
≥ –/60/60 FRL Non-loadbearing Wall^{AS 3959:2018, 3.2.3 (b) (i)}
≥ 60/60/60 FRL Loadbearing Wall^{AS 3959:2018, 3.2.3 (b) (ii)}
–/60/30 FRL Self-closing Fire Door^{AS 3959:2018, 3.2.3 (c)}
–/60/– FRL permanently closed Window^{AS 3959:2018, 3.2.3 (c)}
Extends to underside of a non-combustible roof^{AS 3959:2018, 3.2.3 (b) (ii)}
Masonry Wall
≥ 90mm thk^{AS 3959:2018, 3.2.3 (b) (iii)}
Openings protected as above
Fire Doors & Windows to AS 1905.1 & AS 1530.4^{NCC 2022 Vol 1, G5D1NCC 2022 Vol 2, H7D4}

AS 3959:2018, 3.2.3 (a)

AS 3959:2018, 3.2.3

AS 3959:2018, 3.2.3 (b)

AS 3959:2018, 3.2.3 (b) (i)

AS 3959:2018, 3.2.3 (c) (ii)

> 6m separation^{AS 3959:2018, 3.2.3 (a)}, or
Same Fire-resisting construction^{AS 3959:2018, 3.2.3} , or
Main Building protected by
≥ –/60/60 FRL Non-loadbearing Wall^{AS 3959:2018, 3.2.3 (b)}
≥ 60/60/60 FRL Loadbearing Wall^{AS 3959:2018, 3.2.3 (b)}
–/60/30 FRL Self-closing Fire Door^{AS 3959:2018, 3.2.3 (b) (i)}
–/60/– FRL permanently closed Window^{AS 3959:2018, 3.2.3 (c) (ii)}

Roofing

Non-combustible materials^[1]
Full layer of Sarking^[2][3]
Seal Joints^[4]
Vents fitted with Ember Guards^[5]

Roofing RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.1 (a)

AS 3959:2018, 8.6.1 (b)

AS 3959:2018, 8.6.1 (c)

AS 3959:2018, 8.6.1 (d)

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Constructed with Non-combustible materials^{AS 3959:2018, 8.6.1 (a)}
Roof/Roof & Roof/Wall junctions sealed, or^{AS 3959:2018, 8.6.1 (b)}
Backed with a breathable Sarking or Mesh^{AS 3959:2018, 8.6.1 (b)}
Roof Ventilation openings fitted with non-combustible Ember Guards, or Screens^{AS 3959:2018, 8.6.1 (c)}
Evaporative Coolers are prohibited^{AS 3959:2018, 8.6.1 (d)}

Screen RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{AS 3959:2018, 3.6.1}

Tiled Roof RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.2

AS 3959:2018, 8.6.2 (b)

AS 3959:2018, 8.6.2 (a)

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Roof to be entirely sarked, installed over Roof Frame, including^{AS 3959:2018, 8.6.2}
Ridges^{AS 3959:2018, 8.6.2 (b)}
Hips^{AS 3959:2018, 8.6.2 (b)}
Turned up into Gutters, & Valleys
Battens can be installed on top of the Sarking^{AS 3959:2018, 8.6.2 (a)}

Eave & Fascia RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.6 (c)

AS 3959:2018, 8.6.6 (b)

AS 3959:2018, 8.6.6 (a)

AS 3959:2018, 8.6.6 (f)

NSW RFS 2019 PBP, 7.5.2

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Eaves^{AS 3959:2018, 8.6.6 (c)}
≥ 6mm thk Eaves to be Fibre-cement, or
≥ 6mm thk Calcium Silicate
Fascias to AS 1530.1^{AS 3959:2018, 8.6.6 (b)}
≥ 9mm Fibre-cement or Steel^{AS 3959:2018, 8.6.6 (a)}
Gables to be constructed as per Walls^{AS 3959:2018, 8.6.6 (f)}
Joints to be sealed with non-combustible Plastic Joining Strips or Timber storm Moulds^{NSW RFS 2019 PBP, 7.5.2}

Metal Sheet Roof RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.3 (a)

AS 3959:2018, 8.6.3 (b)

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Roofs entirely sarked, except^{AS 3959:2018, 8.6.3 (a)}
If with Insulation with foil underneath blankets allowed over Battens
Gaps sealed at Edges, Hips, & Ridges with^{AS 3959:2018, 8.6.3 (b)}
Mesh or perforated sheet screened
Mineral Wool
Non-combustible materials

Penetrations RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.5 (a)

AS 3959:2018, 8.6.5 (b)

AS 3959:2018, 8.6.5 (d)

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Sealed with non-combustible material^{AS 3959:2018, 8.6.5 (a)}
-/30/- FRL for glazed assemblies^{AS 3959:2018, 8.6.5 (b)}
Non-combustible Pipes or Conduit^{AS 3959:2018, 8.6.5 (d)}

Skylight RULES

NCC 2022 V1

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.5 (b)

AS 3959:2018, 8.6.5 (c)

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
-/30/- FRL glazed assemblies^{AS 3959:2018, 8.6.5 (b)}
≤ 18° Roof Pitch^{AS 3959:2018, 8.6.5 (c)}
Use Steel or Bronze Frames to resist corrosion^{AS 3959:2018, 8.6.5 (c)}
Ventilation openings to be screened^{AS 3959:2018, 8.6.5 (c)}

Gutter & Downpipes RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.7

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to NCC Specification 1, NCC Part G5, & AS 3959
Gutter materials to be non-combustible^{AS 3959:2018, 8.6.7}
Box Gutter flashed at Roof junction
Valley Leaf Guards, optional
No requirement for Downpipes

AS 3959:2018, 8.6.2

AS 3959:2018, 8.6.1 (a)

AS 3959:2018, 8.6.3 (a)

AS 3959:2018, 8.6.1 (b)

AS 3959:2018, 8.6.1 (c)

Non-combustible materials^{AS 3959:2018, 8.6.2}
Full layer of Sarking^{AS 3959:2018, 8.6.1 (a)AS 3959:2018, 8.6.3 (a)}
Seal Joints^{AS 3959:2018, 8.6.1 (b)}
Vents fitted with Ember Guards^{AS 3959:2018, 8.6.1 (c)}

Sarking

≤ 5 Flammability Index^[1]
Roofs need a full layer of Sarking^[2][3]

Sarking RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.10

NSW RFS 2019 PBP, 7.5.2

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.10AS 3959:2018, 3.10}
≤ 5 Flammability Index^{NSW RFS 2019 PBP, 7.5.2}
Non-combustible material^{NSW RFS 2019 PBP, 7.5.2}
Continuous to the outside to Walls & Roof^{NCC 2022 Vol 1, G5D1}
Type of Sarking varies on building location, consulting a professional is recommended^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.6.2

AS 3959:2018, 8.6.3 (a)

AS 3959:2018, 3.10

≤ 5 Flammability Index^{AS 3959:2018, 8.6.2}
Roofs need a full layer of Sarking^{AS 3959:2018, 8.6.3 (a)AS 3959:2018, 3.10}

Eaves & Fascias

Gables need to be built same as Fire Walls^[1]
Eaves penetrations sealed^[2]
Seal Joints^[3]

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

Eave & Fascia RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.6 (c)

AS 3959:2018, 8.6.6 (b)

AS 3959:2018, 8.6.6 (a)

AS 3959:2018, 8.6.6 (f)

NSW RFS 2019 PBP, 7.5.2

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.6 (c)AS 3959:2018, 8.6.6 (b)}
Eaves^{AS 3959:2018, 8.6.6 (a)}
≥ 6mm thk Eaves to be Fibre-cement, or
≥ 6mm thk Calcium Silicate
Fascias to AS 1530.1^{AS 3959:2018, 8.6.6 (f)}
≥ 9mm Fibre-cement or Steel^{NSW RFS 2019 PBP, 7.5.2}
Gables to be constructed as per Walls^{NCC 2022 Vol 1, G5D1}
Joints to be sealed with non-combustible Plastic Joining Strips or Timber storm Moulds^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.6.6 (a)

AS 3959:2018, 8.6.6 (d)

AS 3959:2018, 8.6.6 (f)

Gables need to be built same as Fire Walls^{AS 3959:2018, 8.6.6 (a)}
Eaves penetrations sealed^{AS 3959:2018, 8.6.6 (d)}
Seal Joints^{AS 3959:2018, 8.6.6 (f)}

Doors, Frames, Sidelights

Doors with Seals all round^[1]
≥ 35mm thk non-combustible Panels^[2]
≥ 6mm Toughened Glazing^[3]
Metal framing materials^[4]

Door RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.5.4 (b) (i) (A)

AS 3959:2018, 8.5.4 (b) (i) (B)

AS 3959:2018, 8.5.4 (b) (i) (C)

AS 3959:2018, 8.5.4 (b) (ii)

AS 3959:2018, 8.5.4 (b) (vii)

AS 3959:2018, 8.5.4 (b) (v)

AS 3959:2018, 8.5.4 (b) (iv)

AS 3959:2018, 8.5.4 (a)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.5.4 (b) (i) (A)AS 3959:2018, 8.5.4 (b) (i) (B)}
Door Leaf^{AS 3959:2018, 8.5.4 (b) (i) (C)}
Non-combustible
Solid, laminated or reconstituted Timber^{AS 3959:2018, 8.5.4 (b) (ii)}
≥ 35mm thk
400mm above threshold
Fully framed glazed panels with^{AS 3959:2018, 8.5.4 (b) (vii)}
Metal
Bushfire-resistanting Timber
Approved Timber species
uPVC framing
Frames^{AS 3959:2018, 8.5.4 (b) (v)}
Metal, Bushfire-resisting Timber, Timber species, or Metal-reinforced uPVC
Aluminum, Stainless Steel, or corrosion-resistant Steel as reinforcement
Tight fitting to Door frame & abutting Door^{AS 3959:2018, 8.5.4 (b) (iv)}
Seals & Weather Strips all round^{AS 3959:2018, 8.5.4 (a)}
≤ 5 Flammability Index
Glazing^{NCC 2022 Vol 1, G5D1}
≥ 6mm Toughened Glass
No requirements on door if^{NCC 2022 Vol 2, H7D4}
Protected by a Bushfire Shutter
Protected by Screens

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.5.4 (b) (i) (B)

AS 3959:2018, 8.5.4 (b) (iv)

AS 3959:2018, 8.5.4 (b) (iii)

AS 3959:2018, 8.5.4 (b) (v)

Doors with Seals all round^{AS 3959:2018, 8.5.4 (b) (i) (B)}
≥ 35mm thk non-combustible Panels^{AS 3959:2018, 8.5.4 (b) (iv)}
≥ 6mm Toughened Glazing^{AS 3959:2018, 8.5.4 (b) (iii)}
Metal framing materials^{AS 3959:2018, 8.5.4 (b) (v)}

Decks & Landing

Enclosing the entire Subfloor will be protected^[1]
Non-combustible material^[2]

Decks & Landings RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.7.1

AS 3959:2018, 8.7.2.1

AS 3959:2018, 8.7.3

AS 3959:2018, 8.7.4

AS 3959:2018, 8.7.5

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.7.1AS 3959:2018, 8.7.2.1}
Decks & similar structures^{AS 3959:2018, 8.7.3}
No gaps allowed between Deck boards
Subfloor enclosure not mandatory
Enclosed Subfloor^{AS 3959:2018, 8.7.4}
Enclosing the entire Subfloor will be protected
Walls to same rules as building, & openings protected by
≤ 2mm aperture screen of corrosion-resistant materials
No requirements for Support & Framing
Unenclosed Subfloor ^{AS 3959:2018, 8.7.5}
Non-combustible Support & Framing
Handrails & Barriers^{NCC 2022 Vol 1, G5D1}
≤ 125mm from combustible Wall or Glazing
Non-combustible material required
≥ 125mm from Building
No requirement
Veranda Posts^{NCC 2022 Vol 2, H7D4}
Non-combustible material
Materials constructed to AS 1530.8.1

AS 3959:2018, 8.7.2.4 (a)

NSW RFS 2019 PBP, 7.4

Enclosing the entire Subfloor will be protected^{AS 3959:2018, 8.7.2.4 (a)}
Non-combustible material^{NSW RFS 2019 PBP, 7.4}

Bushfire Shutter

Made of materials resistant to combustion^[1]
≤ 2mm Aperture Gaps, Slots or Screen^[2]

Bushfire Shutter MATERIALS

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.5.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.5.1NCC 2022 Vol 1, G5D1}
Materials resistant to combustion^{NCC 2022 Vol 2, H7D4}

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

Bushfire Shutter RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.7 (a)

AS 3959:2018, 3.7 (b)

AS 3959:2018, 3.7 (d)

AS 3959:2018, 3.7 (e)

AS 3959:2018, 3.7 (f)

AS 3959:2018, 3.7 (g)

AS 3959:2018, 3.7

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.7 (a)AS 3959:2018, 3.7 (b)}
Optional
Remove Windows & Doors requirements^{AS 3959:2018, 3.7 (d)AS 3959:2018, 3.7 (e)}
Non-removable & securely attached to the building^{AS 3959:2018, 3.7 (f)}
Able to be closed manually in case of power failure^{AS 3959:2018, 3.7 (g)}
Gaps & Perforations
≤ 2mm gap to Wall, Frame, or Sill^{AS 3959:2018, 3.7 (g)}
≤ 20% perforated area^{AS 3959:2018, 3.7}
≤ 2mm aperture size openings, evenly distributed^{NCC 2022 Vol 1, G5D1}
Safe Exit / Egress^{NCC 2022 Vol 2, H7D4}
≥ 1 to be openable from inside to allow escape

AS 3959:2018, 8.5.1

AS 3959:2018, 3.6.1

Made of materials resistant to combustion^{AS 3959:2018, 8.5.1}
≤ 2mm Aperture Gaps, Slots or Screen^{AS 3959:2018, 3.6.1}

Penetrations

Sealed with non-combustible materials^[1]

Penetrations RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.5 (a)

AS 3959:2018, 8.6.5 (b)

AS 3959:2018, 8.6.5 (d)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.5 (a)AS 3959:2018, 8.6.5 (b)}
Sealed with non-combustible material^{AS 3959:2018, 8.6.5 (d)}
-/30/- FRL for glazed assemblies^{NCC 2022 Vol 1, G5D1}
Non-combustible Pipes or Conduit^{NCC 2022 Vol 2, H7D4}

Screen RULES

NCC 2022 V2

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.6.1

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.6.1NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.6.5 (a)

Sealed with non-combustible materials^{AS 3959:2018, 8.6.5 (a)}

Attached Structure

Follow adjacent structure requirements^[1], or
Main Building is protected by
≥ –/60/60 FRL Non-loadbearing Wall^[2]
≥ 60/60/60 FRL Loadbearing Wall^[3]
–/60/30 FRL Self-closing Fire Door^[4]
–/60/– FRL permanently closed Window^[5]

Attached Structure RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 3.2.1

AS 3959:2018, 3.2.1 (a)

AS 3959:2018, 3.2.1 (a) (i)

AS 3959:2018, 3.2.1 (a) (ii)

AS 3959:2018, 3.2.1 (b)

AS 3959:2018, 3.2.1 (b) (i)

AS 3959:2018, 3.2.1 (b) (iii)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 3.2.1AS 3959:2018, 3.2.1 (a)}
Same Fire-resisting construction as the Main Building^{AS 3959:2018, 3.2.1 (a)}
Openings protected by
≥ –/60/60 FRL Non-loadbearing Wall^{AS 3959:2018, 3.2.1 (a) (i)}
≥ 60/60/60 FRL Loadbearing Wall^{AS 3959:2018, 3.2.1 (a) (ii)}
–/60/30 FRL Self-closing Fire Door^{AS 3959:2018, 3.2.1 (b)}
–/60/– FRL permanently closed Window^{AS 3959:2018, 3.2.1 (b) (i)}
Masonry Wall
≥ 90mm thk^{AS 3959:2018, 3.2.1 (b) (iii)}
Openings protected as above
Fire Doors & Windows to AS 1905.1 & AS 1530.4^{NCC 2022 Vol 1, G5D1NCC 2022 Vol 2, H7D4}

AS 3959:2018, 3.2.1

AS 3959:2018, 3.2.1 (a)

AS 3959:2018, 3.2.1 (a) (i)

AS 3959:2018, 3.2.1 (a) (ii)

Follow adjacent structure requirements^{AS 3959:2018, 3.2.1}, or
Main Building is protected by
≥ –/60/60 FRL Non-loadbearing Wall^{AS 3959:2018, 3.2.1 (a)}
≥ 60/60/60 FRL Loadbearing Wall^{AS 3959:2018, 3.2.1 (a)}
–/60/30 FRL Self-closing Fire Door^{AS 3959:2018, 3.2.1 (a) (i)}
–/60/– FRL permanently closed Window^{AS 3959:2018, 3.2.1 (a) (ii)}

Guttering & Downpipes

Fully Flashed & non-combustible Box Gutter^[1]
Turn Sarking into Gutter^[2]

Gutter & Downpipes RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.6.7

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.6.7NCC 2022 Vol 1, G5D1}
Gutter materials to be non-combustible^{NCC 2022 Vol 2, H7D4}
Box Gutter flashed at Roof junction
Valley Leaf Guards, optional
No requirement for Downpipes

AS 3959:2018, 8.6.7

AS 3959:2018, 8.6.2

Fully Flashed & non-combustible Box Gutter^{AS 3959:2018, 8.6.7}
Turn Sarking into Gutter^{AS 3959:2018, 8.6.2}

Vent & Weepholes

Use rust-proof Screens for the Vents^[1]

Door RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.5.4 (b) (i) (A)

AS 3959:2018, 8.5.4 (b) (i) (B)

AS 3959:2018, 8.5.4 (b) (i) (C)

AS 3959:2018, 8.5.4 (b) (ii)

AS 3959:2018, 8.5.4 (b) (vii)

AS 3959:2018, 8.5.4 (b) (v)

AS 3959:2018, 8.5.4 (b) (iv)

AS 3959:2018, 8.5.4 (a)

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.5.4 (b) (i) (A)AS 3959:2018, 8.5.4 (b) (i) (B)}
Door Leaf^{AS 3959:2018, 8.5.4 (b) (i) (C)}
Non-combustible
Solid, laminated or reconstituted Timber^{AS 3959:2018, 8.5.4 (b) (ii)}
≥ 35mm thk
400mm above threshold
Fully framed glazed panels with^{AS 3959:2018, 8.5.4 (b) (vii)}
Metal
Bushfire-resistanting Timber
Approved Timber species
uPVC framing
Frames^{AS 3959:2018, 8.5.4 (b) (v)}
Metal, Bushfire-resisting Timber, Timber species, or Metal-reinforced uPVC
Aluminum, Stainless Steel, or corrosion-resistant Steel as reinforcement
Tight fitting to Door frame & abutting Door^{AS 3959:2018, 8.5.4 (b) (iv)}
Seals & Weather Strips all round^{AS 3959:2018, 8.5.4 (a)}
≤ 5 Flammability Index
Glazing^{NCC 2022 Vol 1, G5D1}
≥ 6mm Toughened Glass
No requirements on door if^{NCC 2022 Vol 2, H7D4}
Protected by a Bushfire Shutter
Protected by Screens

Vent & Weepholes RULES

NCC 2022 V3

All Building Classes

NCC 2022 G5, H7D4, & S1

[2019 G5, 3.10.5, Sch 5]

May 2023

AS 3959:2018, 8.4.3

NCC 2022 Vol 1, G5D1

NCC 2022 Vol 2, H7D4

Building elements within Bushfire-prone Areas to be Bushfire Attack Resistant to the NCC^{AS 3959:2018, 8.4.3NCC 2022 Vol 1, G5D1}
Corrosion-resistant Steel or Bronze Perforated Sheet or Mesh with
≤ 2mm aperture size or opening^{NCC 2022 Vol 2, H7D4}

AS 3959:2018, 8.4.3

Use rust-proof Screens for the Vents^{AS 3959:2018, 8.4.3}

Wall Lining Installation (FRL)