ROCKWOOL
This mineral-based insulation board enhances fire safety and acoustic control in both roofing and facade applications.
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Non-combustible and fire-resistant for increased occupant safety in commercial builds.
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Delivers exceptional acoustic insulation, improving internal comfort levels.
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Moisture-resistant yet breathable, helping to manage vapour and air flow.
Introduction
ROCKWOOL insulation is a non-combustible, stone wool board used in warm roof systems where fire safety and acoustic performance are essential priorities.
With a long history of use in New Zealand commercial and multi-unit buildings, ROCKWOOL provides both thermal resistance and high levels of sound absorption. It is especially suited to buildings with occupancy below or sensitive acoustic requirements, such as schools, apartments, and hospitals.
Installed above the vapour barrier and beneath the waterproof membrane, ROCKWOOL performs well under torch-on systems like Nuraply 3PM. It can also be used in conjunction with hybrid systems or in roofs where non-combustibility is a specification requirement.
While slightly heavier than PIR, it offers increased fire protection and resistance to deformation over time. ROCKWOOL is part of the Nuratherm range and supported with full system guidance to ensure it meets performance targets and building code compliance.
For further information on ROCKWOOL solutions, visit Outright Insulation — a sister brand to Nuralite and the official distributor of ROCKWOOL in Aotearoa — at outright.co.nz
Considerations
Heavier than PIR: Its higher density adds significant dead load to the structure, requiring engineering confirmation — particularly on timber or lightweight decks.
Requires dual-layer installation for load distribution: To meet NZ warm roof performance and compressive strength requirements, ROCKWOOL typically needs a high-density coverboard upper layer combined with the ROCKWOOL base.
Slower install and weather sensitivity: ROCKWOOL boards are bulkier and more fragile to install than PIR rigid boards which should be considered when programming the job.
FAQs
What is ROCKWOOL insulation NZ used for in waterproofing or insulation?
Where is ROCKWOOL insulation NZ typically installed on a flat roof?
What are the technical benefits of using ROCKWOOL insulation NZ?
Related Projects
ROKI Hotel
Auckland
Hotel Britomart
Auckland
Related Webinars
Outright Continuous Insulation // Windsor Substation Project
Discussing the concept and details of producing a low-carbon building to enhance sustainability and environmental impact.
Presented by Shane Clarke (Nuralite), Mike Skilton (Outright), Tricia Love (Tricia Love Consultants Ltd), and Charissa Snijders (CSA Architect).
Design Principles of the ARA Parka Wrap Retrofit
Discussing the recently completed project saw a 'state house' transformed into a 'low-energy' home.
Presented by Shane Clarke (Nuralite), John Simmons (Outright), Jon Davies (Parka Wrap) and Joe Lyth (Respond Architects).