Advanced Non-Vented

Customizable Thermal Solution

Dimond Advanced Non-Vented - engineered to redefine thermal efficiency with customizable R-values, effectively mitigating condensation challenges in diverse climates.

Dimond Advanced Non-Vented, utilizes a two-part water vapour and condensation control system, designed to perform effectively in all environments.

Thermal Performance:
- Utilizes PIR board core with customizable R-values (R2.0 to R7.0), ensuring tailored efficiency.

 

Condensation Management:
- Features a complete vapour barrier layer, separating internal and external environments to eliminate condensation concerns.
- Includes a two-part water vapour and condensation control system with vapour barrier and underlay.

Construction Timelines:
- Streamlines construction timelines with early close-in capability using Liner Deck and a self-adhesive vapour control layer.

Flexibility:
- Offers design flexibility with various options from the Dimond Range, allowing customization based on base metal, coating, and exposure zone.

Other Features:
- Suitable for all environments and cost-effective compared to the vented system.
- Has limitations on sheet length (up to 25m) due to thermal movement.
- Overcomes composite insulated roof panel limitations.

Limitations:

• Not intended for installation over a plywood liner.
• Roof pitch meets the minimum required pitch for the selected top sheet product.

All components in Dimond Advanced Roofing Systems are warranted by their individual manufacturer for use in Dimond Advanced Roofing Systems. Component warranties are subject to the terms and conditions set out by the individual manufacturer. Dimond Advanced Roofing Components must be installed, used, and maintained in accordance with the individual manufacturer’s guidelines.

The Non-Vented Difference

Identifying the difference between Non-Vented and Vented.
We recommend the vented roof rail on roof sheets over 25m and in freezing climates as the vented rail allows the top sheet to expand and retract separately from the components below. Additionally, in freezing conditions, it serves as a cold deck, minimizing the chances of ice damming.

Environmental Challenges
New Zealand's inherently variable climate challenges occupant comfort in buildings, requiring effective insulation and moisture management to maintain year-round comfort and reduce energy consumption. Without the correct systems in place, the fluctuating weather conditions, ranging from hot summers to cold winters, can lead to thermal discomfort and moisture-related issues such as condensation and mould growth. Existing methods often fail to provide custom solutions for effective insulation and vapour barrier needs, resulting in inefficient thermal regulation and increased energy usage.

Addressing the Challenge with the Advanced Non-Vented Solution
Dimond Advanced Non-Vented effectively tackles the challenge of New Zealand's variable climate by providing a ground-breaking solution for thermal performance. Its customizable R-values (R2.0 to R7.0) offer tailored efficiency, ensuring optimal insulation for different climatic conditions. The product eliminates condensation concerns with a complete vapour barrier layer, effectively separating internal and external environments to prevent moisture-related issues such as condensation and mould growth.

Additionally, Dimond Non-Vented streamlines construction timelines with early close-in capability using NPM Liner Deck and a self-adhesive vapour control layer, ensuring efficient installation and minimizing construction-related disruptions. Compliant with Building Code and NZ Metal Roofing Code standards, Dimond Non-Vented assures weather-tightness, while its separable top skin allows precise customization, overcoming the limitations of composite insulated roof panels.

Furthermore, the integration of the Acoustic Board, Audioperf, effortlessly enhances acoustic performance, providing a comprehensive solution for occupant comfort in buildings across New Zealand's variable climate.

Interact with each component in the 3D render below:

A closer look at Advanced Non-Vented

Dimond Base Sheet
 

Dimond Base Sheet comes in two styles tailored to specific regions: Dimond BB900 for the North Island and Dimond LT7 for the South Island. Crafted from G550 steel, it is available in thicknesses of 0.40mm or 0.55mm BMT, providing sturdy support for roofing projects.'

Dimond Vapour Barrier
 

CaVap Alu 1500 UV-AC is an air and vapour barrier consisting of a multilayer aluminium composite, with a tear-resistant fabric reinforcement. The membrane is equipped on its underside with an all-over acrylate adhesive which is covered by a siliconized polyethylene liner.
 

PIR Insulation Board

Advanced Non-Vented's insulated roof system is available in two brands of high-quality PIR insulation board options, Thermakraft T28 and IKO Enertherm and in multiple thicknesses to suit your required R Value.
 

Refer to manufacturers' BPIS and installation data in the downloads section.

Dimond Underlay

Dimond underlay is a choice of Thermakraft Covertek 403 or Pro Clima Solitex Mento 1000 connect.
 

Dimond Top Sheet

All Dimond roof profiles can be used as a Dimond Top Sheet and are manufactured out of Pacific Coil Coaters ColorCote or New Zealand Steel COLORSTEEL product.

Product Variations (Thickness, Shape, and General Product Variables)

Refer to Table 2.1A, of the Dimond BPIS, which summarises the general base and top Sheet material options available.

Manufactured using different coatings available from Pacific Coilcoaters or New Zealand Steel depending on the durability required for the environment the roof or wall will be installed in, in accordance with AS/NZS 2728. For more information refer to Table 2.1C of the Dimond BPIS downloaded online at www.dimond.co.nz

Refer to environmental literature available from Pacific Coilcoaters or New Zealand Steel or contact Dimond^® Roofing on 0800 766 377. Duraclad^® is recommended for use in special areas such as fertiliser works or very severe marine. 


 

Fixings

Fix Dimond Base Sheets every 2nd crest into the internal purlin spacings and every crest on sheet ends, using a 12g x 20mm tek (for steel purlins) or a T17x 35mm (for timber purlins).

Fix the Dimond Top Sheet using the appropriate length and fixing patten of 12g or 14g screw through the roof system and into the roof or wall structure as per the Dimond BPIS.

Fixings must match or surpass the durability of the material they secure. Additionally, their metal or coating should be compatible with the cladding material if they come into contact. For pre-painted steel products, fasteners must be factory colour-matched before installation.

Screw fasteners need to have adequate length to ensure they penetrate the supporting structure properly. Generally, for screws into timber, a minimum embedment of 30mm is recommended, while screws into steel should engage at least three threads. In severe environments, a minimum Class 4 rating is necessary, whereas very severe environments call for a Class 5 rating.

For further information, refer to the manufacturer's BPIS and installation data.

CodeMark Certified Warm Roof Systems, Backed by a 20-Year Dimond System Warranty
 

Dimond Advanced Roofing Systems give architects, designers, developers and builders a clearer pathway to specifying high-performance warm roof systems in New Zealand. DARS brings together tested system build-ups, technical documentation, CodeMark certification, installation guidance, QA requirements and a 20-year Dimond system warranty into one controlled roofing solution.
 

Designed to support better building outcomes

Warm roof design is becoming increasingly important as projects look to improve thermal performance, manage condensation risk, support acoustic outcomes and provide greater confidence through specification, consent and construction. DARS has been developed to make that process easier.
 

By selecting a Dimond Advanced Roofing System, project teams gain access to:

• CodeMark Certified warm roof system options.

• tested and documented system build-ups.

• technical and specification support.

• thermal and condensation design support.

• acoustic performance guidance where required.

• fire performance information for assessed system build-ups.

• QA and installation guidance.

• a clearer close-out and warranty pathway; and

• long-term system protection through a 20-year Dimond system warranty.

Protecting the design intent

A warm roof system only performs as intended when the correct components are used together in the approved build-up. That is why DARS is supplied as a complete Dimond system. The approved system components, technical details and QA pathway are designed to work together and support the CodeMark and warranty position. 
 

For projects seeking CodeMark alignment and the 20-year Dimond system warranty, the required DARS components must be supplied through Dimond and installed in accordance with the relevant Dimond technical literature, project-specific design requirements and warranty conditions.
 

This helps protect:

• the specified system build-up.

• component compatibility.

• compliance confidence.

• project documentation.

• the customer’s warranty position; and

• the long-term performance intent of the roof system.

Confidence from specification through to close-out

DARS provides a more controlled pathway from early design through to project completion. Our team can support architects, designers, developers, main contractors and roofing installers with system selection, technical guidance, project-specific considerations, documentation and warranty close-out requirements.

System protection that matters

The 20-year Dimond system warranty is designed to provide confidence in the approved DARS roof system supplied by Dimond.
 

It supports the system approach by linking the warranty to the approved components, correct installation, required QA documentation and ongoing maintenance.
 

Substituting components, mixing non-approved products or changing the system without written approval from Dimond may affect CodeMark reliance and warranty eligibility.

Warranty requests and technical support

For DARS warranty requests, system guidance or further technical information, please contact the Dimond Roofing Technical Team at rooftech@dimond.co.nz.

Talk to Dimond early

The best outcomes are achieved when DARS is considered early in the design and specification process.
 

Talk to the Dimond team about the right Advanced Roofing System for your next project.