Advanced Vented

Trusted Thermal Performance

Dimond Advanced Vented - engineered for maximal thermal performance while managing condensation in cold climates.

Dimond Advanced Vented incorporates a vented structural rail to facilitate airflow and thermal expansion control, with added features to prevent ice dams in cold climates with high snowfall.

Thermal Performance:
- Utilizes PIR insulation board with customizable R-values (R2.0 to R7.0).
- Prevents heat transfer with PIR insulation, ensuring continuous thermal insulation.
- Maintains cold top roof deck temperature, preventing ice dams in cold climates

Condensation Management:
- Features a complete vapour barrier layer, eliminating condensation risk by separating internal and external environments.
- Includes a vented structural rail for airflow and thermal expansion control, further reducing condensation risks.

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

Flexibility:
- Offers design flexibility with various top sheet options from the Dimond Range, allowing tailored roofing solutions.
- Suitable for both roof and wall cladding, with optional acoustic control layers for enhanced acoustic performance.

Other Features:
- Allows sheet lengths up to 90m.
- Can be tailored for fire ratings.

Limitations:

• Not intended for installation over a plywood liner.
• In coastal environments Dimond Vented Roof Rail to be coated in epoxy primer to prevent corrosion.
• 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 Advanced Vented Difference

Identifying the difference between Vented vs Non-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
Cold climates pose significant challenges for traditional roofing systems, including issues with thermal performance and condensation management. Uneven temperatures and moisture accumulation can lead to problems like ice dams and condensation-related damage, impacting both structural integrity and occupant comfort. Existing methods often fail to provide tailored solutions for effective insulation and vapour barrier needs, resulting in inefficient thermal regulation and increased energy usage.

Addressing the Challenge with the Advanced Vented Solution
Dimond Advanced Vented offers a globally recognised solution to the environmental challenges presented by cold climates. Featuring a PIR Insulation Board core, it ensures continuous thermal insulation with customizable R-values (R2.0 to R7.0). With a complete vapour barrier layer, Dimond Advanced Vented eliminates condensation risk by separating internal and external environments.

Its vented rail design maintains a cold top roof deck temperature, preventing ice dams—a critical feature for cold climate regions. This design enhances thermal performance and speeds up construction timelines with early close-in capability and easy installation.

Dimond Advanced Vented meets weather-tightness and compliance standards, ensuring reliable performance in harsh conditions. Integration with Acoustic Board, Audioperf, enhances indoor comfort effortlessly.

For added robustness, Dimond Advanced Vented integrates seamlessly with other Dimond Advanced Insulated Roof Systems. With its adaptability and efficiency, Dimond Advanced Vented sets a new standard for cold climate roofing challenges, delivering unmatched performance for residential and commercial projects.

Interact with each component in the 3D render below:

A closer look at Advanced Vented

Dimond Advanced Vented Base Sheet

Dimond Base Sheet comes in two profiles 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, that is covered by a siliconized polyethylene liner.

Dimond PIR Insualtion Board

Advanced Vented's insulated roof system is available in two brands of high-quality PIR insulation board options, Kingspan Therma TR28 and IKO Enertherm, both can be offered in a range of thicknesses to achieve the required thermal resistance.

• Density: 32 kg/m3
• Compression Strength:
  - 30-45mm: at 10% deformation ≥ 175 kPa (EN 13165)
  - 50-160mm: at 10% deformation ≥ 200 kPa (EN 13165)
• Thermal Conductivity (λD W/(mK)) : 0.022mK
  
  

Available as square edge.
Complies with EN1316:2012 for thermal performance

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

Dimond Underlay

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

Vented Roof Rail

Dimond Vented Roof Rail is a 27mm high component manufactured out of G500 1.45mm BMT Z450 (450g/m²) galvanised steel.

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 Statement 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 Dimond Vented Roof Rails with 2 / 14 g -10 thread’s per inch Tek steel screws into steel purlins or type 17 into timber purlins. Two fixings are required every 900mm centres for high wind zones and below and 600 centres for very high and extra high wind zones. Overall screw length varies and is dependent on the thickness of the Dimond PIR Insulation Board.

Fix the Dimond Top Sheet using the appropriate length and fixing patten of 12g or 14g screw into the Dimond Vented Roof Rails as per the Dimond technical manual.

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.