VENT Passive Ventilation Products Now BRANZ Appraised

BRANZ appraisals for VENT’s popular Ridge Vent, Vented Batten and Apron Batten give specifiers further assurance of the quality of VENT passive ventilation systems.

“Councils have raised concerns about E2 — external moisture coming into buildings as result of use of vents,” explains James Johnston, Commercial Manager, VENT. “The BRANZ appraisal confirms compliance with E2 to give architects and builders peace of mind.” The appraisal also confirms compliance with NZBC Clause B1 Structure, Clause E3 Internal Moisture, Clause B2 Durability and Clause F2 Hazardous Building Materials.

Specified individually or as part of one of VENT’s passive ventilation systems designed specifically for different roof designs, these products mitigate the risk of internal moisture build-up and associated issues caused by internal moisture.

VENT Ridge Vent

Currently the only BRANZ appraised ridge vent for metal roofing in the market, the patented VENT Ridge Vent is designed to create negative pressure to draw air through the roof cavity, providing continuous airflow of 8,000mm² per linear metre.

VENT Vented Batten

VENT’s Vented Batten is the only batten in NZ designed with calculated airflow, specifically for roof ventilation. It allows calculated airflow of 18,000m² per linear metre.

VENT Apron Batten

The VENT Apron Batten is currently the only BRANZ appraised apron/abutment vent for metal roofing in the market. Specifically designed to ventilate on abutment details or be installed on a monopitch skillion roof detail, the batten ensures calculated airflow of 8,000mm² per linear metre.

Designed for both new builds and renovations and made from affordable recycled polypropylene, each of VENT’s BRANZ-appraised vents is insect-proof with 4mm vents preventing the ingress of nesting insects. The vents are easy to install and are backed by a 30 year warranty. Used individually or in conjunction with other VENT products, they help to maintain dry, healthy roof spaces.

Vent Ridge Vent — RV10P

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The VENT Ridge Vent is designed to release warm air from the roof void using the natural convection of rising warm air or by means of negative pressure created by wind blowing over the roof.

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.

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.

BRANZ Appraised

Ventilated Apron Vent — RV10P-Half

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The VENT Apron Vent RV10P Half is a Polypropylene Vent which enables warm air to escape from the lower roof void or through the barge detail of a mono-pitch skillion roof.

Roof Ventilation Products have been 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 VENT Ventilated Apron Vent (RV10P Half) is recommended on all abutment details and on all mono pitched skillion roof types irrespective of the degree of the pitch of in order to draw the airflow through these tight roof designs. The RV10P Half is essential to allow the natural convection action of rising warm air maintains a continuous airflow along the underside of the roof.

The vent is placed over the roof cladding and under the flashing detail. It is fixed by means of adhesive flashing tape that secures the RV10P Half into position. The steel flashing is then placed over the top and fixed through the vent into the top timber batten or steel purlin as per usual practice. The adhesive flashing tape has a 60% flexibility and has been tested on roofing steel roofing profiles with a rib height of up to 46mm, which enables suitability to most steel roofing profiles. The adhesive tape creates a water type seal which prevents driving rain or water from entering the roof.

The product can be utilised on both residential and commercial projects.

Extra High Wind Zone

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.

BRANZ Appraised

Ventilation & Drainage Batten 20mm – VB20

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The VENT Vented Batten is a strong, durable purlin cavity batten that is designed to ensure that unimpeded airflow is guaranteed through the roof cavity of a Skillion Roof design, enabling passive airflow around the entire building envelope.

Roof Ventilation Products have been 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 VENT Vented Batten (VB20) is designed for use on all skillion roof designs irrespective of the roof cladding. It can be used in all climates and weather conditions.

The VENT Vented Batten will fix to the top of the roof purlins, the upper edge of the fascia and underneath the barge flashing, and is compatible with steel and timber purlins.

Residential skillion roofing and commercial buildings
Designed to ensure that unimpeded airflow through the roof cavity of a skillion roof design
Also designed as a purlin vent to allow airflow throughout roof area
New build or renovation
VB20 can also be used on walls to create vertical or horizontal ventilation flows

See BRANZ Appraisal 979

Extra High Wind Zone

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.

BRANZ Appraised

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