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Description

VENT-A-ROOF® is a unique passive ridge ventilation system that promotes the circulation of fresh air through roof spaces, ceiling and building spaces in commercial and light industrial buildings, residential homes and most metal sheds.

  • Improves roof ventilation with continuous airflow, reducing AC energy consumption
  • Mitigates condensation, humidity, and unhealthy mould and mildew
  • Keeps spaces cooler in summer and manages condensation in winter
  • Provides an NCC compliant roof ventilation system
  • A passive system with no moving parts to wear out or maintain
  • A BAL compliant roof ventilation solution
  • Suitable for CUSTOM ORB®, TRIMDEK® and KLIP-LOK®

Technical Specifications

Schematic

Lengths

VENT-A-ROOF® louvres are available in 1.5m lengths in box lots of 10. Lysaght Rolltop Ridge and Folded ridges are available in 6-8m lengths as per your local LYSAGHT® branch service offer

Material Specification

VENT-A-ROOF® steel vent components are manufactured from 0.4mm BMT Next generation ZINCALUME® aluminium/zinc/magnesium alloy coated steel which complies with AS 1397:2011 G300, AM125 125g/m2 minimum coating mass.
LYSAGHT steel claddings and flashings are available in a range of materials and finishes including:

  • Next generation ZINCALUME® steel aluminium/zinc/magnesium alloy coated steel complies with AS 1397:2011 G300, AM125 125g/m2 minimum coating mass.
  • COLORBOND® steel is pre-painted steel for exterior roofing and walling. It is the most widely used. The painting complies with AS/NZS 2728:2013 and the steel base is an aluminium/zinc alloy-coated steel complying with AS 1397:2011. Minimum coating mass is AM100 (100g/m2).
  • COLORBOND® Metallic steel is pre-painted steel for superior aesthetic qualities displaying a metallic sheen.
  • COLORBOND® Ultra steel is pre-painted steel for severe coastal or industrial environments (generally within about 100m - 200m of the source). The painting complies with AS/NZS 2728:2013 and the steel base is an aluminium/zinc alloy-coated steel complying with AS 1397:2011. Minimum coating mass is AM150 (150g/m2).

Span Table

See Table 1 in the VENT-A-ROOF® Design & Installation Guide for a ready reckoner for a Deemed to Comply solution for both whirlybirds and VENT-A-ROOF® in both skillion and gable/ hip roof configurations utilising eave vents as part of the ventilation solu

Capacity & Load Tables

Wind Pressure
Pa		Wind
Speed		External air
temp
differential
to attic
space air
temp
(degrees
Celsius)		1m VENT-A-ROOF®
louver Skillion
Ridge
(with 45-50mm
throat dimension)		1m VENT-A-ROOF®
louver Gable/Hip
Ridge
(2m of louver)
(with 45-50mm throat
dimension)		1m VENT-A-ROOF®
louver Skillion
Ridge
= 1 300mm
Whirlybird		1m VENT-A-ROOF®
louver Gable/Hip
Ridge
(2m of louver)
kmhknotsAirflow
(m3/s)		Heat
Extraction
(kW)

Airflow
(m3/s)

Heat
Extraction
(kW)		Airflow
(m3/s)		Heat
Extraction
(kW)		Airflow
(m3/s)		Heat
Extraction
(kW)
000

6

0.0060.0460.0130.091331.51.5
120.0070.0960.0130.192331.51.5
180.0070.1510.0140.302331.51.5
400.0070.3520.0150.704331.51.5
2.063.260.010.0690.0190.138331.51.5
120.010.1430.0200.286331.51.5
180.010.2260.0210.451331.51.5
3.684.360.0110.0820.0230.165331.51.5
120.0120.1670.0230.333331.51.5
180.0120.2620.0240.524331.51.5
8.0126.560.0170.1230.0340.246331.51.5
120.0170.2510.0350.502331.51.5
180.0180.3790.0350.758331.51.5
12.5158.160.020.1440.0400.288331.51.5
120.020.290.0400.58331.51.5
180.020.4410.0410.882331.51.5
14.2168.660.0210.1520.0420.304331.51.5
120.0220.3120.0430.623331.51.5
  • Aiflows represented for 0 wind speed are entirely due to convection.
  • Increasing wind speeds will cool a sunlit roof hence reductions in attic v ambient termperatures for higher wind speeds
  • Shaded area represents default Australian design pressure of 12.5 Pa

 

Made in Australia

All Lysaght products are proudly made in Australia from 100% Australian steel.

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Downloads

Brochures & Catalogues

VENT-A-ROOF Brochure PDF(1.48 MB). Last updated 1 Jun 2021

User Guides & Manuals

VENT-A-ROOF Design and Installation Guide PDF(1.63 MB). Last updated 15 Feb 2023

Availability

New South Wales & ACT
Available
Northern Territory
Available
Queensland
Available
South Australia
Available
Tasmania
Available
Victoria
Available
Available
Filled
Available
Outlined
Not Available

Colour Range

STANDARD COLOUR RANGE

  1. Basalt®
  2. Classic Cream™
  3. Cottage Green®
  4. Deep Ocean®
  5. Dune®
  6. Evening Haze®
  7. Gully®
  8. Ironstone®
  9. Jasper®
  10. Manor Red®
  11. Monument®
  12. Night Sky®
  13. Pale Eucalypt®
  14. Paperbark®
  15. Shale Grey™
  16. Surfmist®
  17. Wallaby®
  18. Windspray®
  19. Woodland Grey®

ULTRA COLOUR RANGE

  1. Dune®
  2. Monument®
  3. Surfmist®
  4. Wallaby®
  5. Windspray®
  6. Woodland Grey®

MATT COLOUR RANGE

  1. Basalt®
  2. Monument®
  3. Shale Grey™
  4. Surfmist®

METALLIC COLOUR RANGE

  1. Aries™
  2. Astro™
  3. Celestian™
  4. Cosmic™
  5. Galactic™
  6. Rhea™

Unpainted Steel Range

  1. ZINCALUME® steel

COLORBOND® steel Studio Library

COLORBOND® steel Studio enables you to browse over 200 COLORBOND® steel colours. Search by RGB or HEX colour values or DULUX or RAL colour names to return the closest match from over 200 available colours.

Please check with your local supplier regarding specific colour availability for this product.

The COLORBOND® steel colour swatches shown have been reproduced to represent actual product colours and finish as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing, as varying light conditions and limitations of the printing process may affect colour tones and finish. All colours & finishes may not be available in all regions or for all profiles. To determine the most suitable material for your project, please contact your supplier or steel.com.au/Colorbond.

Pricing

Pricing for all our products varies based on availability and quantity.

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Questions?

Phone (Mon-Fri, 9AM-5PM AEST/AEDT):

1800 641 417

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100 Years Celebration

LYSAGHT® products have been made in Australia for 100 years.

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