Expert Airtightness & Life‑Safety Compliance for High‑Rise Buildings
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High‑rise buildings behave like large chimneys – air and smoke migration driven by pressure differences (stack effect) can compromise occupant safety and energy performance if the building envelope is not properly sealed. Stairwell pressurisation systems required under AS 1668.1 must maintain positive pressure to prevent smoke ingress.
At Aerotight, we provide engineered solutions to help projects meet and demonstrate compliance with:
• NCC Section J airtightness mandates for Class 2–9 buildings
• AS/NZS ISO 9972:2015 airtightness testing methodology
• AS 1668.1 smoke control and stairwell pressurisation
• Green Star / NABERS energy efficiency verification
Properly sealed stairwells enable pressurisation systems to function correctly under fire conditions.
NCC requires validated evidence; poor airtightness can delay occupancy permits.
Reduced infiltration lowers HVAC loads, supporting Green Star and NABERS targets.
Early identification of leakage prevents costly rework and latent defects.
Objective: Verify total building air permeability meets NCC Section J targets (typically 10 m³/h·m² @ 50 Pa, tighter for Green Star).
Approach: ATTMA Level 2 & 3 certified blower door arrays, software‑controlled for high-rise complexity.
Objective: Ensure stairwell enclosures can sustain positive pressure per AS 1668.1.
Deliverables: Pressure differential reports, system performance verification, and remediation guidance.
Identify leakage at windows, joints, slab edges before cladding approval - prevents late-stage corrections.
Targeted testing for inter-unit sealing in high-end residential towers, enhancing comfort, odour control, and privacy.
Aerotight technicians hold ATTMA Level 2 & 3 certifications and have extensive Australian high-rise project experience.
Sample room testing during construction captures systemic sealing issues early, reducing cost and delays.
Reports are tailored for Building Surveyors, Fire Engineers, Project Managers, and Owners, ensuring airtightness evidence withstands scrutiny.
Standard / Code
Relevance
NCC Section J
Airtightness verification for high-rise compliance
Envelope performance influences energy ratings
Real-world airtightness results across Australia, delivered by Aerotight. Explore how precision testing, compliance expertise, and proven outcomes help projects meet strict performance standards with confidence.
Hear directly from builders, architects, and project teams across Australia who trust Aerotight for accurate testing, smooth compliance, and dependable results on every project.
Increasingly, yes. Early engagement with Aerotight smooths the permit process.
The Stack Effect occurs when temperature differences between the inside and outside of a tall building cause air to move vertically through lift shafts and stairwells. If the building envelope is "leaky," this effect creates massive energy loss, whistling noises, and door-closing issues. Aerotight’s testing identifies the leakage paths in the facade and core that drive the Stack Effect, restoring comfort and efficiency.
Developers, architects, engineers, and owners across Australia trust Aerotight to deliver compliant, efficient, and safe high-rise outcomes.
Ready to Aerotight your project? Contact our specialists to map your pathway to compliance and performance.
Need airtightness testing for compliance or project verification? Submit the form and our team will reach out to you shortly.
