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PX Cavity Rail Support System

High performance rear-ventilated facade system

PX Cavity Rail System
The Rear-ventilated Rain Screen facade

PX40, PX20 & PXR are a ventilated rainscreen cladding with a cavity rail system for fibre cement or HPL cladding panels. It allows for panels to be mounted and provides an expressed joint finish. All systems offer a combination of visual appeal and practicality, making it a suitable choice for contemporary buildings seeking effective cladding solutions.

 

The PX system incorporates an anodised aluminium rail support system to achieve a certain cavity depth, either 20mm or 40mm. This cavity allows for ventilation and drainage, preventing moisture buildup and improving the overall thermal performance of the building. The system is specially designed for a quick and easy install on standard NZS 3604 timber framing.

Functional and Aesthetic

Cladding panels are attached to the support rails with the concealed adhesive fixing system, creating a clean and high aesthetic finish. Select from prefinished panels offered in a large range of colours and surface textures, only requiring low maintenance, or a plain panel ready for the site applied paint finish of your choice. The system offers architects design flexibility and freedom, as the panels can be customized in terms of size, layout, colour and finish, creating unique facades for the specific project.

 

The system can be used anywhere in New Zealand including coastal locations and up to extreme wind pressures. Making it suitable for a vast range of building types; residential, education and commercial buildings.

 

Overall, the rainscreen system provides a cost effective, durable and visually appealing solution for cladding buildings, offering both functional and aesthetic advantages.

Features & Benefits

Rain-screen Cladding with natural bottom to top ventilation

Suitable for buildings over 10m, in conjunction with a PS1

Complies with C/AS2 5.8 External Wall Cladding

Adhesive fixed Cladding have no LRV colour restrictions

Maintenance free when used with a Prefinished Cladding Panel

Easy to Install

Designed to install on standard NZS 3604 timber framing

No double framing required at vertical expressed joints

Anodized Aluminium support rails and components provide 50 year service life

15 year system warranty

PX Support System Options

There are 3 PX Cavity Rail Support System options; PX40, PX20 & PXR.

The options vary slightly in cavity depth, drainage, ventilation and adhesive application.

For guidance on which option to use, a clear comparison of the options can be seen below.

Although there are 3 options, the finished façade looks the same for all 3.

The PX substructure can then match with 3 different cladding products.

See further below for panel options.

40mm Cavity Depth

Drained and

Bottom to Top Ventilated

Suitable for buildings at any height

Recommend for Commercial or

any projects requiring a deeper cavity depth

May require site-specific PS1

due to building height

standard 20mm cavity

Unrestricted Building Height

May require site-specific PS1

Flexible horizontal joints without

extra framing

Easy and Quick Install

Mainly Vertical rails

20mm Cavity Depth

Drained and

Bottom to Top Ventilated

Suitable for buildings up to 25m

Recommend for Residential,

Light Commercial Buildings &

Ministry of Education (MoE) projects

May require site-specific PS1

due to building height

Pros & Considerations

standard 20mm cavity

Suitable for up to 25m

May require site-specific PS1

Flexible horizontal joints without

extra framing

Easy and Quick Install

Mainly Vertical rails

20mm Cavity Depth

Drained at every

Horizontal Joint

Suitable for buildings below 10m

Recommend for Residential,

Light Commercial Buildings

 

BRANZ