These passive ventilation systems can be applied to all building types in all areas.

VENT's passive ventilation roofing systems allow a calculated amount of fresh air to enter the roof cavity.  

As part of the VENT passive ventilation roofing system, the VENT Roll Panel Vent (G502)  ensures a 25mm gap is maintained between rigid or flexible roof underlays and insulation to avoid moisture transfer and air disturbance, to meet the requirements of most insulation products.

Vent passive ventilation systems can be used with roof types such as long run, pressed metal, asphalt shingle and concrete tiles.

The system also works well with mechanical ventilation systems that are not externally ventilated i.e they do not ventilate from outside the building but from inside the roof cavity.

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VENT's Passive Roof Ventilation Products comply with the following provisions of the NZ Building Code:

• B1.3.1, B1.3.2
• B1.3.3 (a)
• B1.3.4 (a, b, c, d, e)
• B2.3.1 (a)
• B2.3.2 (a)

Evidence: All products are manufactured by Manthorpe Building Products Ltd (UK) who are ISO 9001 accredited by SGS Certificate # GB12/84769, certified since 2011.

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Suitable for use in new and existing buildings within the following scope:

• Up to 10m in height, and
• With a risk score of less than 20, when evaluated against the E2/AS1 risk matrix, and
• In wind zones up to extra high as defined in NZS 3604:2011, and
• In all corrosion zones as defined in NZS3604:2011

It is recommended for cold roofs with a pitch above 15°

The VENT Over Fascia Ventilator should be screw fixed to the top of the fascia through the fixing holes provided along the full length of the eaves

Use in conjunction with other products from the VENT range to provide a complete roof ventilation system. Such as:

• The VENT Ridge Vent (RV10P) and the VENT Roll Panel Vent (G502) for roof pitches over 30°
• The VENT Roll Panel Vent (G502) for roof pitches between 15°-30°

The VENT Over Fascia Vent will fix along the top edge of any flat top fascia profile. It is compatible with steel and timber fascias.

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Extra High Wind Zone

Blue Building Solutions Passive Roof Ventilation Products comply with the following provisions of the NZ Building Code:

• B1 Structure: 1.3.1, B1.3.2, B1.3.3(a), B1.3.4 (a, b, c, d, e)
• B2 Durability: B2.3.1(a), B2.3.2(a) — The G1200N is durability tested and can support the weight of the bottom row of any heavy roof tiles

All products are manufactured by Manthorpe Building Products Ltd (UK) who are ISO 9001 accredited by SGS Certificate # GB12/84769, certified since 2011.

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Appraised for use as non-structural roof battens and vents for use with pitched and skillion roof construction on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and,
• with profiled metal roof cladding; and,
• situated in NZS 3604 Wind Zones up to, and including Extra High

The RV10P is designed to be compatible with roof cladding profiles with a trough depth of <38mm.

See BRANZ Appraisal 979 (2023) for full information.

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Extra High Wind Zone

In the opinion of BRANZ, Roof Ventilation Products, if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet or contribute to meeting the following provisions of the NZBC:

• Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4. Roof Ventilation Products meet the requirements for loads arising from gravity loads, wind and impact [i.e. B1.3.3 (b), (h) and (j)]
• Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years and B2.3.2. Roof Ventilation Products meet these requirements
• Clause E2 EXTERNAL MOISTURE: Performance E2.3.2. Roof Ventilation Products contribute to meeting this requirement
• Clause E3 INTERNAL MOISTURE: Performance E3.3.1. Roof Ventilation Products contribute to meeting this requirement
• Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Roof Ventilation Products meet this requirement

See BRANZ Appraisal 979 (2023) for full information.

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BRANZ Appraised

Suitable for use in new within the following scope:

• Up to 10m in height, and
• With a risk score of less than 20, when evaluated against the E2/AS1 risk matrix, and
• In wind zones up to extra high as defined in NZS 3604:2011, and
• In all corrosion zones as defined in NZS3604:2011

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Extra High Wind Zone

VENTs Passive Roof Ventilation Products comply with the following provisions of the NZ Building Code:

• B1.3.1, B1.3.2
• B1.3.3 (a)
• B1.3.4 (a, b, c, d, e)
• B2.3.1 (a)
• B2.3.2 (a)

Evidence: All products are manufactured by Manthorpe Building Products Ltd (UK) who are ISO 9001 accredited by SGS Certificate # GB12/84769, certified since 2011.

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