MINUTES
NORTHLAND BRANCH
TRAINING AND NETWORKING EVENT
held on
FRIDAY 8th, JUNE 2018
at
CENTRAL LIBRARY, May Bain Room
RUST AVENUE, WHANGAREI
Attendance:
Kaipara District Council: Kerry Hewson, Matthew Williams
Far North District Council: Peter Martin, Carmel Taylor, Greg Machin, Nicola Clark, Dave Currie, Kevin Piper, John Edwards, Barry Dawson, Shayna Dean-Bhana, Richard Poole
Whangarei District Council: Paul Van De Sluis, Shane Hakaraia, Rikki Comins (new member), Fred Higgison, Paul Cook, Jessica Berridge, Monica Popata, Les Smith (guest)
Guests:
Terry Blake, IQP for spray booths
David Osten, technical advisor, Weather Barrier Systems
Apologies:
Jamie Nikora (Branch Chairman), Stuart Ferris, Graham Payton, Brendan Rosetta and other members of the Northland Branch unable to attend.
In the absence of Jamie Nikora, Peter Martin (Current Branch Secretary) was acting Chairman and Carmel Taylor was acting Secretary.
Guest Presentations:
Presentation 1:
Topic: Spray Booth installation and G4 Ventilation
Terry Blake, Seetal (Spray booth installation and service).
Terry has had a long history of involvement with spray booths right from his beginning as a spray booth apprentice through to his current involvement with Seetal Australia setting up a spray booth manufacturing business (including installation and service) in NZ. Terry is also involved with the current revision of AS/NZS 4114 Spray Painting booths, designated spray painting areas and paint mixing rooms – Part 1: Design, construction and testing.
Spray Booths:
Terry’s presentation noted that spray booths are generally an enclosed structure within an existing building. They require specific ventilation which is required to be on the compliance schedule as a specified system. Terry and his company manufacture, install, test and certify compliance of their spray booths with the relevant electrical and gas standards and are IQP’s for the ventilation component of spray booths for the compliance schedule. Terry provided an example of the owners manual his company provides with each new spray booth installation and this includes all areas that require inspection for the Compliance Schedule.
Terry outlined how spray booths worked noting they require air in and out of the booth itself but may also provide a supply of breathable air for the operator (from a compressor). Some booths may heat the air by gas, diesel or electricity.
In his role as an IQP, he outlined the many aspects of the booth which require checking including compressed air, exhaust and intake air flow, burner (gas or diesel) operation and checking duct work has been cleaned. Gas and electrical aspects of the work also require inspection as well as hazardous substances eg diesel.
Terrys presentation highlighted the numerous aspects and complexities around the spray booth which must be considered both during processing, inspecting and the ongoing inspections required for the Building Warrant of Fitness. Terry also noted the presence of many illegal spray booths throughout NZ.
G4 Ventilation:
Terry highlighted the fact that although a fan may have a theoretical capacity, this can be greatly reduced by bends or additional ducts and may explain why some fans are not working as well as they should. He noted different types of fans (centrifugal versus axial) have different efficiencies and often not a lot of extra cost to upgrade.
Terry highlighted the importance of the correct design for ventilation with an example of how negative pressure from an extract fan broke the water seal to a floor waste gully trap in an apartment building and resulted in foul air within the apartment. This highlighted the importance of Ventilation in building design.
Presentation 2:
Topic: Weather Barrier Systems
David Osten, Weather Barrier Systems Ltd (Tyvek)
David is the technical advisor for Weather Barrier Systems, the NZ marketing and distribution partner for Dupont Tyvek.
Part 1: Wall Underlay
David’s presentation covered the relevant building code clauses for building wall and roof underlays. This included E2 , G4, H1 and B2. The functional requirements of underlay include that they have high air and water resistance, they have vapour permeability (breath) and are durable. David likened building paper to skin.
The underlay together with the insulation, framing and cladding, forms part of the energy and moisture management system in the building. Air movement will greatly reduce efficiency of the insulation so it is important that the underlay does this.
Part 2: Rigid Wall Underlay
David noted that NZ is a small market with a challenging environment and is price driven. Consumers often overlook the importance of non-visible building components in favour of more visible and expensive components. However the non-visible components (such as underlay) form an important part of the building performance.
David recommended both a rigid wall underlay and a wall underlay over the RAB (refer to E2/AS1 9.1.7.2 (c) this is for EH wind zones and unlined walls). This is because the nails fixing the rigid wall underlay provide a potential water ingress point.
David demonstrated the Tyvek 2 tape system for flashing around windows and also provided a sample of the Tyvek metal roof underlay which incorporates a drainage mat that provides a drainage and ventilation plane (suitable in skillion type roofs).
David emphasized the importance of using what is specified and the risks of substitution.
Following the presentations all presenters were thanked for their Informative and Interesting Presentations.
Previous Minutes & Matters Arising
Previous minutes were confirmed as correct.
Moved: Dave Currie, Seconded: Kevin Piper
Correspondence
The BOINZ Training notifications, AGM information, Straight Up magazine are all available on members emails. Members would have received these emails through BOINZ as well as the wide range of information in the Monthly Update.
General Business:
Overview of recent BOINZ Annual Conference, Dunedin:
Positive comments from members that attended the conference who found it was invaluable to meet other Building Officers from other parts of NZ and learn about new ideas/technology including prefab buildings.
Northland Branch featured in the Awards ceremony with Matthew Williams Kaipara District Council, winning the Young Building Controls Professional of the Year and Northland Branch winning the Branch of the Year.
Other General Business:
Paul Cook raised issues of pressures facing officers and to defer to seniors/management for direction and also noted the introduction of mass produced prefabricated aluminium housing coming into the district and recommended that the 3 councils have a unified approach to these.
Bellavista apartments – general discussion and lessons that could be learned.
Notice to Fix process review discussed by Peter Martin and Paul Cook.
The Next Branch Meeting will be hosted by Far District North Council on Friday the 7th September 2018 – at Te Ahu Centre, Kaitaia with proposed tour of Te Ahu Centre and site visit to JNL Mill, Kaitaia - time and exact location to be confirmed.
The meeting was closed by Northland Branch Secretary (acting Chairman), Peter Martin and Carmel Taylor acting Secretary.
Carmel Taylor
Acting Northland Branch Secretary
Carmel.taylor@fndc.govt.nz
