What is Cor-Vent®?

Cor-Vent® is a passive roof ventilation system with compliance to Code NCC 2022 ABCB housing Provision Part 10.8.3 & Vol1 F8D5 requirements. It is designed to help create airflow pathways to reduce the risk of moisture and condensation within roof spaces.

Cor-Vent® Range

We offer both low and high level Cor-Vent® products that cater to various roof pitches from 0°~75°.

Which product suits which roof?

This guilde explains the range and when each product is suitable. Read product guide.

Design

Cor-Vent® products are made from Australian made fluted polypropylene board (Corflute®); a robust substrate perfectly suited to roof ventilation requirements.

Design Registered angled cut edge allows airflow when installed under membranes. The open ‘flutes’ improve airflow and helps avoid possible blockage from overlapped sarking.

The Cor-Vent® 8K and 5K products include a 45° cut on both open ends (flute openings). Cor-Vent® 25K product has a 90° cut on both ends.

Installation

Cor-Vent® product installations do not require any special tools, training, or major changes to the roof build. Cor-Vent® Installation Guides are included in the Installation PDF’s above.

Certification

Cor-Vent® products are designed to meet applicable NCC 2022 Deemed-to-Satisfy airflow-opening requirements. Dedicated BAL-rated products are available for applicable bushfire-prone areas.

General features of the Cor-Vent® range

• Applies to ventilation requirements for climate zones 6, 7 and 8
• Designed for roof pitch from 0° to 75°
• Light weight and engineered from Corflute®
• Made from recyclable polypropylene (PP)
• Offered in up to 2.5 meter lengths
• All 8K, and 25K 50 & 100 products are available in ‘Foldable’ formats for transportation convenience
• Easy to install. Can be screwed or bonded to battens or rafters

Cor-Vent® BAL & Fire Rated Solutions

• Compliant to AS3959 Clause 3.6 (BAL-LOW to BAL-29)
• Supplied with durable coated aluminium ember mesh with less than 2mm apertures
• Mesh profile design incorporates additional open area to meet roof ventilation requirements
• BAL tested with aluminium external mesh

Foldable Design for Easier Transport and Handling

Cor-Vent® products are engineered with a foldable design to make transportation, storage and on-site handling easier.

A precision half-depth score line is incorporated at the midpoint of each strip, allowing the product to fold neatly in half for packaging without affecting its intended performance once installed.

Simply unfold the Cor-Vent® strip on site to its full working length.

Example:

• Folded length: 1250 mm
• Installed length: 2500 mm

The following Cor-Vent® products are supplied in a folded format:

• Cor-Vent® 25K 50
• Cor-Vent® 25K 100
• Cor-Vent® 8K products

Benefits

Reduced package size
Easier to transport and store.

Lower freight volume
Compact packaging helps improve freight efficiency.

Simple on-site installation
Unfold to the full 2500 mm working length before installation.

• Standard Pitch Roofs – 15°~75°
• Steel & Tile Roofs 
• Products: Cor-Vent® 8K (Low Level) and Cor-Vent® 5K (High Level)

• Cor-Vent 8K meets DTS 7000mm²/m installed along the two longest horizontals calculation based on the longest planned dimension of the roof.
• Cor-Vent 5K meets DTS 5000mm²/m installed on one side (high level) but typical to install on both sides.

Foldable format

All 2500 mm Cor-Vent® 8K products are supplied in a folded format for easier handling, storage and transportation.

• Low Pitch Roofs – 0°~15°
• Steel Roofs 
• Products: Cor-Vent® 25K (Low Level) and Cor-Vent® 5K (High Level)

• Cor-Vent 25K meets DTS 25000mm²/m installed along the longest building length and opposite ends for skillion roof < 10°.
• Cor-Vent 25K meets DTS 25000mm²/m installed along the longest length on low level in conjunction with Cor-Vent 5K on high level for roof pitch < 10°~15°.

Foldable format

All 2500 mm Cor-Vent® 25K 50 and 25K 100 products are supplied in a folded format for easier handling, storage and transportation.

Updated roof space ventilation requirements

Cor-Vent® satisfies Compliance Code NCC 2022 ABCB housing Provision Part 10.8.3 & Vol1 F8D5 requirements.

1. Minimum 20 mm gap maintained between insulation and sarking.
2. Eave ventilation opening in accordance with Table 10.8.3.

* Not applicable to Cor-Vent Ridge (High Level)

Read product sheets for specific product specifications.

Cor-Vent® is typically supplied in white. To maintain product availability and production efficiency, some products may occasionally be manufactured in black or blue using the same high-quality Corflute® material.

Colour does not affect the product’s performance, ventilation capacity or durability. If colour is important for your project, please contact our Customer Experience team before ordering.

Giving Every Piece of Cor-Vent® a Purpose

At Corex, sustainability doesn’t end when a product leaves our factory. As the manufacturer of genuine Corflute®, we also operate Australia’s leading Corflute® Recycling Program, providing a dedicated recovery pathway for genuine Corex Corflute® products, including Cor-Vent®.

Designed for long-term performance, Cor-Vent® is intended to remain in place for the life of the roof. However, installation offcuts, surplus material and genuine Corex Corflute® products that reach the end of their useful life can be returned for recycling. The polypropylene material is recovered and reused in the manufacture of new Corex products, helping divert valuable resources from landfill and supporting Australia’s circular economy.

Learn more about the Corflute® Recycling Program.