Roofing (Glass) Building Codes & Rules

- Glass Roofing: Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.

Thermal Setting Block

Reglet Flashing

Flashing into Gutter

AS 1288:2021, 6.4.2 (b)

Fall

≥ 3° to support sagging & tolerance to prevent water pooling^{AS 1288:2021, 6.4.2 (b)}

Insulation

≥ 15° recommended to facilitate cleaning

Apron Flashing seal & fix to Glass Roof System

Fall

Glass

UV or film as specified
Laminated preferred
Arrised edges at exposed Eaves to limit hazards

Drip Edge

Structural support

Sarking

AS 1288:2021, 6.4.2

≥ 3°^{AS 1288:2021, 6.4.2}

≥ 15°

Fall

Purlin

HB 39:2015, 8.1.4

≥ 50^{HB 39:2015, 8.1.4}

≥ 50

HB 39:2015, 8.4

≥ 50^{HB 39:2015, 8.4}

HB 39:2015, 8.1.4

≥ 50^{HB 39:2015, 8.1.4}

Maintenance

Check base components every^[1]
12 months clean debris, wash coating
Access for maintenance to have Safety Label & not located at trafficable areas

Rooflight MAINTENANCE

NCC 2022 V1

All Building Classes

NCC 2022 S5C16, J4D5, J5D4, HP13.2.4, & HP13.4.3

[2019 Spec C1.1:3.6, J1.4, J3.3, 3.12.1.3, 3.12.3.2]

May 2023

AS 4285:2019, F

Rooflights to be energy-efficient, fire-resistant, sealed or capable of being sealed, and constructed to the NCC
Ensure Rooflight integrity through upkeep for safe & proper use^{AS 4285:2019, F}
Do not use window cleaning fluid on polymers
Use scratch-proof cleaning materials
Clean glass / polymers with mild or natural detergent
Use warm water & rinse well
Base Components
Inspect periodically
Remove leaf & rubbish build-up
Glazing, Timber, & Mechanical Accessories
Check every 12 months
Lubricate mechanical parts

AS 4285:2019, F

Check base components every^{AS 4285:2019, F}
12 months clean debris, wash coating
Access for maintenance to have Safety Label & not located at trafficable areas

Roof Sheeting

Weather Fold Ends
End of Ribs sealed & fastened, or^[1][2][3]
End capped
Profiled Foam Filler Strip
Anti-capillary cut if required^[4]

Roof Sheeting RULES

NCC 2022 V2

All Building Classes

NCC 2022 F3, H2D6, J4D4, & HP7 [2019 3.5.1-3.5.5, J1.3, 3.5]

May 2023

Roofing detailed and built to the NCC
Refer to detail below for roof ≤ 5°

HB 39:2015, 5.5 (d)

HB 39:2015, 8.6.2 (d)

HB 39:2015, 7.13

HB 39:2015, 7.14

Weather Fold Ends
End of Ribs sealed & fastened, or^{HB 39:2015, 5.5 (d)HB 39:2015, 8.6.2 (d)HB 39:2015, 7.13}
End capped
Profiled Foam Filler Strip
Anti-capillary cut if required^{HB 39:2015, 7.14}

Energy Efficiency

Required to be weatherproof & sealed^[1]
Installed with ceiling diffusers^[2]
Has a shutter system^[3]

Thermal Performance (for NSW)

NCC 2022 V3

All Building Classes

NCC 2022 S5C16, J4D5, J5D4, HP13.2.4, & HP13.4.3

[2019 Spec C1.1:3.6, J1.4, J3.3, 3.12.1.3, 3.12.3.2]

May 2023

NSW 2023 BASIX, Energy

Rooflights to be energy-efficient, fire-resistant, sealed or capable of being sealed, and constructed to the NCC
DIY Method^{NSW 2023 BASIX, Energy}
≤ 300m² conditioned floor area
Glazing to be 10 to 40% of conditioned floor area
≤ 3m² cumulative area of Rooflights & Roof Windows
1 to 2 storeys high for single dwellings
≤ 25m² Open Mezzanine

Roof Light Building Sealing Energy Efficiency

NCC 2022 V1

Class 1 & 10a

NCC 2022 HP13.2.4 & 13.4.3 [2019: 3.12.1.3 & 3.12.3.2]

May 2023

NCC 2022 HP, 13.2.4 (a)

NCC 2022 HP, 13.2.4 (b) (ii)

NCC 2022 HP, 13.2.4 (b) (i)

Comply with thermal performance requirements
Area ≤ 5% of the minimum area required for ventilation in the room served^{NCC 2022 HP, 13.2.4 (a)}
Transparent or translucent elements
≤ U3.9 U-Value^{NCC 2022 HP, 13.2.4 (b) (ii)}
Total System SHGC, see Table below^{NCC 2022 HP, 13.2.4 (b) (i)}

NCC 2022 HP, 13.4.3 (1)

NCC 2022 HP, 13.4.3 (2) (a)

NCC 2022 HP, 13.4.3 (2) (c)

Required to be weatherproof & sealed^{NCC 2022 HP, 13.4.3 (1)}
Installed with ceiling diffusers^{NCC 2022 HP, 13.4.3 (2) (a)}
Has a shutter system^{NCC 2022 HP, 13.4.3 (2) (c)}

Overhead Glazing

Thermally broken frame^[1]

Sloped Overhead Glazing RULES

NCC 2022 V1

All Building Classes

NCC 2022 F6D3, B1F2, S5C16, J4D5, J5D4, HP13.2.4, & HP13.4.3

[2019 F4.2, BF1.2 Spec C1.1:3.6, J1.4, J3.3, 3.12.1.3, 3.12.3.2]

May 2023

AS 1288:2021, 6.3 (b)

AS 1288:2021, 6.3 (a)

Rooflights to be energy-efficient, fire-resistant, sealed or capable of being sealed, and constructed to the NCC
Grade A Laminated Safety Glass
Grade A Toughened Safety Glass
≤ 500mm^{AS 1288:2021, 6.3 (b)} wide, if Glazing ≤ 3m^{AS 1288:2021, 6.3 (a)} above finished floor
For outer pane of IGU, if ≥ 3m^{AS 1288:2021, 6.3 (a)} above finished floor
Inner pane to be Laminated Glass

AS 1288:2021, 6.3

Thermally broken frame^{AS 1288:2021, 6.3}

Bushfire Construction

Seal openings including gaps & vents^[1]

Roof Penetration Bushfire CONSTRUCTION

NCC 2022 V1

All Building Classes

NCC 2022 G5 & H7D4 [2019 Part G5 & 3.10.5]

May 2023

Buildings located in Bushfire Prone Areas to address bushfire attack risks and be constructed to the NCC

NCC 2022 Vol 1, G5O1 (b)

Seal openings including gaps & vents^{NCC 2022 Vol 1, G5O1 (b)}