Windows & Skylight (Roofing) Building Codes & Rules
- Roof Windows & Skylights: Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
Purlin
Roof Sheeting
Manufacturer's Recommendation - -, -
Flashing KitManufacturer's Recommendation - -, -
- Install into opening using appropriate fastener & sealant on all overlaps
- Ends to form lapped mitre corners
Turn down &
notch to roof profile
Curb Support
AS 4285:2019, 1.7
AS 4285:2019, 2.1.1
WeathertightnessAS 4285:2019, 1.7AS 4285:2019, 2.1.1
- Apply sealant around the perimeter of the framing for a watertight seal around the curb
- Use compatible & durable sealants, gaskets, & weatherstrips against harsh climate conditions
- Seal & fasten end of Ribs above Soaker Gutter
- Provide anti-capillary cuts on female ribs for overlapping sheets
HB 39:2015, 5.5 (b)
Soaker Gutter
- ≥ 100mm wide WaterwayHB 39:2015, 5.5 (b)
Plasterboard Lining
Insulation
Purlin
Sarking
Weather
Trough Ends
Manufacturer's Recommendation - -, -
LocationManufacturer's Recommendation - -, -
- Positioned to match the room's lighting needs
- Clear of obstructions, such as
- Overhanging trees
- Roof parts
- Utility systems
- Vents & other piping
Insulation
Weather Fold & Seal
Insulation
AS 4285:2019, C
Shaft Surface
- ≥ 85% Specular ReflectanceAS 4285:2019, C
Closed Ribs &
Anti-capillary Cut
Curb Support
≥ 200
HB 39:2015, 2.9 (b)
HB 39:2015, 5.5 (g)
≥ 100HB 39:2015, 5.5 (g)
HB 39:2015, 5.5 (g)
≥ 100HB 39:2015, 5.5 (g)
Overhead Glazing
- Grade A Safety Glass[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)
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
- ≤ 500mmAS 1288:2021, 6.3 (b) wide, if Glazing ≤ 3mAS 1288:2021, 6.3 (a) above finished floor
- For outer pane of IGU, if ≥ 3mAS 1288:2021, 6.3 (a) above finished floor
- Inner pane to be Laminated Glass
AS 1288:2021, 6.3
- Grade A Safety GlassAS 1288:2021, 6.3
Shaft & Lightwell
- Flat, smooth, clean, & reflective surface[1]
- Surface should hinder collection of dust
- Maximise light throughput
Rooflight Shaft TYPES
NCC 2022 V1
- Splayed or Flared
- Shaftless
- Straight
- Flexible
- Tubular
- Specular or semi-specular lightwells
- ≥ 85% Specular Reflectance
- > 2m long, highly specular
AS 4285:2019, C
- Flat, smooth, clean, & reflective surfaceAS 4285:2019, C
- Surface should hinder collection of dust
- Maximise light throughput
Turn up ends level with Rib
Typical Sizes
- Derived from[1]
- Lightwell specular reflectivity, Tubular Skylights
- Diffuse, other Skylights
- Consider[2]
- Site's geographic location
- Rooflight location on the roof
- Shape of shaft and its reflectivity
Rooflight SIZES
NCC 2022 V1
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AS 4285:2019, D
AS 4285:2019, D
- Derived fromAS 4285:2019, D
- Lightwell specular reflectivity, Tubular Skylights
- Diffuse, other Skylights
- ConsiderAS 4285:2019, D
- Site's geographic location
- Rooflight location on the roof
- Shape of shaft and its reflectivity
Sarking
Insulation
Ceiling
Installation
- Installed to Manufacturer's Instructions, by a qualified tradesperson
- Tested and passed in accordance with AS 4285
- Ability to withstand concentrated loads
- Ability to withstand wind forces
- Weathertightness
AS 4285:2019, 1.8
Rooflight Assembly FinishesAS 4285:2019, 1.8
- Smooth & uniform surfaces
- Ensure that all jointing is finished with precision, to seamlessly match the adjoining surface
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