FORTX™ Systems | Weathertight Building Façade Systems NZ
Introducing
FORTX™
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FORTX™
MELIOR
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FORTX™ High-Performance Façade Systems
FORTX™ is Pro Clima’s next-generation solution for high-performance building façade systems, designed to simplify weathertight design while delivering long-term durability. Developed for the realities of construction in New Zealand, FORTX™ systems combine advanced weather-resistive barriers, connection detailing, and proven installation methods to create reliable construction façade systems. Compatible with a wide range of cladding types and façade assemblies, the system gives architects, façade engineers, and builders the flexibility to design high-performing envelopes with confidence.
pro clima's new FORTX™ and FORTX™ MELIOR systems provide outstanding weathertightness, vapour control, and long-term durability, and are compatible with all cladding types and cladding support systems. Tested with pro clima’s market-leading ADHERO® WRBs, these systems can be used over any rigid board with optional continuous external ROCKWOOL™ Rainscreen™ insulation. FORTX™ and FORTX™ MELIOR systems work perfectly with applications ranging from low-rise buildings to mid- and high-rise constructions across all building classes.
At the heart of these systems is our commitment to ensuring every building in New Zealand is healthy, durable, and energy efficient. By combining innovative solutions with a focus on long-term performance, we’re not just protecting structure, we’re creating healthier, resilient, sustainable environments for future generations.
Building Code Compliance Made Easy
Tested to AS/NZS 4284 and backed by a third-party engineering report, FORTX™ systems combine best practice in weathertightness, integrated thermal and moisture management, and systemised detailing. By eliminating localised wind-induced stress points, it guarantees long-term envelope durability, protecting your building against harsh weather conditions for decades.
For buildings in seismic regions or buildings of critical nature, the system offers the possibility of using TFLEX flexible control joint material which is vapour permeable and fire retardant.
AS/NZS 4284 tested. Weathertight for all cladding types.
✅ Serviceability Limit State (SLS): 3.5 kPa
✅ Ultimate Limit State (ULS): 5.5 kPa
✅ Seismic Deflection Performance: ±20 mm (SLS) and ±75 mm (ULS)
✅ Air Leakage: <0.1L/s/m2
FORTX™
The pro clima FORTX™ system is a weathertight façade solution suitable for use with any cladding type. It comprises SOLITEX EXTASANA ADHERO® or SOLITEX® ADHERO FC combined with TESCON EXTOSEAL®, TESCON® NAIDECK, TESCON® NAIDECK Patch, and TFLEX flexible control joint material.
FORTX™ System Advantages:
✅ Ultimate weatherproofing: pro clima‘s ADHERO® WRBs resist wind-driven rain and pressure-induced water ingress.
✅ High wind stability: Provides a flat, fully supported and adhered WRB, ensuring consistent performance and long-term durability.
✅ Accommodates building movement: TEEE based ADHERO® WRBs allow bridging of small gaps and TFLEX flexible control joint material suitable for seismic movement joints and interstorey transitions.
✅ Enhanced condensation control: Available with both Class 3 and Class 4 Vapour permeable Weather Resistive Barriers and INTELLO® PLUS.
FORTX™ MELIOR
FORTX™ MELIOR builds on the proven FORTX™ system by incorporating a non-combustible, hydrophobic layer of continuous external ROCKWOOL™ Rainscreen™ insulation, enhancing thermal performance, improving moisture management, and delivering the highest standard of façade safety and efficiency.
FORTX™ MELIOR is a stand-alone solution for weather and thermal protection. Where in-wall insulation is used inside the FORTX™ MELIOR system, incorporating INTELLO® PLUS provides the ultimate solution for airtightness, vapour control and healthy buildings.
FORTX™ MELIOR System Advantages:
✅ Freedom from corrosion, condensation and mould: Rigid boards stay dry, effectively controlling interstitial moisture accumulation.
✅ Enhanced energy efficiency: Minimises thermal bridging, improving overall thermal performance and comfort.
✅ Increased fire safety: Enhances fire protection when paired with ROCKWOOL™ Rainscreen™ non-combustible stone wool insulation in the cavity.
✅ Improved acoustic performance: High density ROCKWOOL™ Rainscreen™ fibrous insulation dampens external noise, improving internal comfort.
✅ Plus all FORTX™ system advantages
Resources
Managing Moisture Risk with WUFI® Modelling
Moisture management starts at the design phase with appropriate material selection. To assess the risks of mould and condensation within assemblies, protect the health of occupants and comply with the objectives of E3 - Internal Moisture in the NZBC, a hygrothermal simulation using WUFI® shall be performed.
Contact a WUFI® professional near you who can assist for your next project.
See upcoming training and events if you or members of your team would like to become qualified WUFI® professionals.
Façade Systems Built for Real Building Performance
Designing reliable building façade systems in New Zealand means balancing weather exposure, thermal performance, structural movement, and long-term durability. FORTX™ façade systems bring these requirements together into a single integrated façade solution. Tested to AS/NZS 4284, the building façade system provides a high-performance Weather Resistive Barrier that helps control wind-driven rain, air leakage, and moisture movement behind the cladding layer. This allows designers and builders to create façade assemblies that perform consistently across a range of building types, from low-rise projects through to mid and high-rise construction.
On site, this translates to simpler detailing and more predictable performance. FORTX™ construction façade systems use fully adhered Weather Resistive Barriers and integrated connection components to create a stable weathertight façade layer behind the cladding. This helps reduce stress points caused by wind pressure and building movement while maintaining reliable weathertightness over time. The FORTX™ systems can be used with most common cladding systems and cladding support products, giving architects and façade engineers greater design flexibility without compromising envelope performance.
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