Cavity Closer by Performance Membranes

Cavity Closer family of systems
Let your walls breathe again
At Performance Membranes, we’ve developed a cavity closure system that promotes natural cavity drying through controlled airflow. Designed for bases, eaves and parapets, it protects while letting buoyancy-driven airflow do the drying work.
Order now
Cavity Closer family of systems
Let your walls breathe again
At Performance Membranes, we’ve developed a cavity closure system that promotes natural cavity drying through controlled airflow. Designed for bases, eaves and parapets, it protects while letting buoyancy-driven airflow do the drying work.
Order now

Features designed to protect your build

The weakest points in most buildings are around the openings and edges. The Cavity Closer eliminates those vulnerabilities at any cavity size with one simple system.

Ember & pest defence

Perforated aluminium profile shields wall cavities from ember attack, insects and debris while keeping the cavity open to breathe. Designed for bushfire-prone areas and manufactured in accordance with AS 3959:2018 ember-screening requirements (2 mm perforations).

Cavity Closer fitted at the base of a wall

Ventilated by design

2 mm perforations maintain a controlled air path that prevents trapped moisture and supports cavity drying in alignment with NCC 2025 condensation management requirements.

Cavity Closer installed on a clean frame

Faster, cleaner installs

Pre-formed internal and external corners and standard 2.4 m lengths make installation quick, consistent and repeatable, regardless of the cladding system.

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Designed for precision, built for performance

From eave details to parapets and overhanging second storeys, the Cavity Closer range is engineered to suit every wall configuration. Each profile is precision-cut, anodised for durability and available in five cavity sizes, giving builders complete flexibility without compromise.

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Precision you can see

Every installation tells the same story: straight lines, tight fit, no distortion. The anodised aluminium profile disappears behind the cladding but keeps the cavity dry and protected for the life of the building. It resists rust, vermin and ember attack while maintaining airflow from bottom plate to eave.

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See the difference performance makes

Watch how the Cavity Closer installs in minutes. It’s a small change that transforms speed, compliance and long-term durability on every build.

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Specify with confidence

Where architectural intent meets compliance certainty

The Cavity Closer is designed to perform in every environment, from inner-city builds to coastal and bushfire-prone zones. Its 2 mm perforations maintain airflow while protecting against ember attack, pests and moisture. Each profile has been developed in accordance with NCC 2025 ventilation and cavity detailing principles and is manufactured in Australia and locally stocked.

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Need a custom shape?

Download the order form, draw the profile with its dimensions, and email it back. We'll confirm price and lead time.

Custom orders

Building in Victoria?

Cavity Closer is sold through local stockists in Victoria, including Bowens. Find your nearest one.

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Trusted by professionals who build for performance

The Cavity Closer is designed for the realities of Australian construction. Builders and architects nationwide rely on the Performance range to deliver compliant, durable and efficient building envelopes that last.

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Get updates on new Performance systems, technical releases and training opportunities. We share practical guidance to help you build faster, smarter and with fewer callbacks.

Ready to close the Performance gaps?

Protect your build from ember attack, vermin and trapped moisture with a system designed for speed and certainty. The Cavity Closer simplifies compliance and demonstrates measurable performance.

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Performance Membranes products are designed to assist in achieving compliance with relevant Australian Standards when installed in accordance with manufacturer guidelines. Always consult a qualified building professional for project-specific design and certification.

Let your walls breathe again

Let your walls breathe again

Shop the range

Cavity Closer

Features designed to protect your build

Ember & pest defence

Ventilated by design

Faster, cleaner installs

Designed for precision, built for performance

Precision you can see

See the difference performance makes

Where architectural intent meets compliance certainty

Need a custom shape?

Building in Victoria?

Trusted by professionals who build for performance

Stay ahead of the build

Ready to close the Performance gaps?

Performance Membranes

Stay in the loop