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.

The VENT Ventilated Apron Vent (RV10P Half) is designed for use on profiled steel roofs and can be used in all climates and weather conditions. The VENT Ventilated Apron Vent must be used in conjunction with other VENT products to ensure a complete ventilation system.

Applying the VENT Ventilated Apron Vent without unimpeded eaves ventilation can result in additional moisture being drawn into the roof cavity as a result of the negative pressure created by the prevailing wind.

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.

The VENT Ventilated Apron Vent (RV10P Half) has been designed and adapted to suit New Zealand building roofing products. The concept of Ventilation and the application of Vents to roof cavities has been standard practice in Canada, the USA and Europe for decades. Since the introduction of the Ventilated Apron Vent to New Zealand that coincided with the amendment of the New Zealand Building Code clause E3:AS1, the RV10P Half has been successfully installed on 100s of New Zealand buildings.

• 4mm vent holes prevent ingress of nesting insects
• Manufactured in recycled plastic
• 15 year warranty