The Systems Approach to Waterproofing Low Sloped Roofs

When selecting waterproofing materials for low pitch roofing, a 'systems' approach is not negotiable.

It can be tempting to treat the waterproofing membrane independently from the accessories, as these are often deemed as secondary and less important components. They can also usually be procured more cost-effectively from local suppliers instead of from the principal membrane manufacturer. However, despite the membrane covering the greatest area, the watertightness of a building is dependent on the system in its entirety.

Cobbling hybrid systems together is dangerous and there's no room for it in the waterproofing industry. Hybrid systems incorporate a conglomerate of various suppliers' components, such as membranes, adhesives, sealants, flashings and accessories. Very rarely are these properly tested for compatibility in the long term.

In contrast, when using a membrane manufacturer's lab and field tested, internationally warranted system, its elements can be installed with confidence.

When it comes to thermo-plastic membranes, welding incompatible plastics together without an intimate knowledge of their composition can be disastrous. For example, PVC, TPO, or TPE membranes welded to say, polyethylene accessories which are more commonly used with rubber membranes can render a surprisingly good initial bond, which gives a false sense of security. Over time, the weld between these incompatible plastics becomes brittle and can eventually break open.

ONLY LIKE FOR LIKE MATERIALS GO TOGETHER

There can be instances when a membrane manufacturer does not make all of the accessories required for the market. In this instance, an empirically disciplined and fully documented process must prevail in order to procure components that will be compatible with the membrane, and to ensure it lasts well beyond the Building Code's minimum durability requirement of 15 years for roofs and decks.

Viking Roofspec recently commissioned a division of the University of Auckland to scientifically 'diagnose' the chemically correct plastic for making accessories compatible with the Enviroclad TPO membrane, as its overseas membrane supplier didn't make these. These locally fabricated items are now integral parts of the Enviroclad membrane system.

As well as minimising risk, a low pitch roof installed to specification by a licensed applicator using the manufacturer's full system is usually more aesthetically pleasing, as the accessories match the look of the membrane that they were designed to be installed with.

This systems principle should not only apply to all low slope membrane systems, but to all construction products.

Note: Viking Bituclad has now been replaced with three fit for purpose solutions: Viking GM Lybra, Gemini and Phoenix Super.

Butylclad Rubber Waterproofing Membrane

Viking Roofspec

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Viking Butylclad is a rubber membrane ideal for waterproofing low-slope roofs and gutters.

NZ-Owned Business

Viking Butylclad Membrane has been appraised for use as a waterproofing membrane for buildings within the following scope:

scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1; and,
with timber supporting structures designed and constructed in accordnace with the NZBC; and,
with nominally flat or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC; and,
with substrates of plywood sheet.

Viking Butylclad Membranes have also been appraised for use as waterproofing membranes for external reinforced concrete and plywood roofs and decks for buildings within the following scope:

up to 3 storeys with a maximum height from ground to eaves of 10m and with a floor plan area limited only by seismic and structural control joints; and,
with the reinforced concrete structure designed and constructed in accordance with the NZBC; and,
with timber supporting structures designed and constructed in accordance with the NZBC; and,
with nominally flat, curved or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC.

The BRANZ Appraisal is limited to roofs and decks within the following scope:

constructed to suitable falls (refer paragraph 12.1 -12.9 of the Viking Butylclad Membrane BRANZ Appraisal); and,
with no steps within a deck level, no integral roof gardens and no down pipe discharging directly onto a deck.

The design and construction of the substrate and movement and control joints is specific to each building, and therefor the responsibility of the building designer and building contractor and is outside the scope of this Appraisal.

The Viking Butylclad Membrane, if designed, used, installed and maintained in accordance with the statements and conditions of the technical literature, will meet or contribute to meeting the following provisions of the NZBC:

Clause B1 STRUCTURE: Performance B1.3.1. Viking Butylclad Membrane meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years. Viking Butylclad Membrane meets this requirement. See paragraph 9.1 of the Viking Butylclad Membrane BRANZ Appraisal.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Roofs, decks, balconies, parapets and gutters incorporating Viking Butylclad Membrane meet this requirement. See paragraphs 12.1 - 12.9 of the Viking Butylclad Membrane BRANZ Appraisal.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Butylclad Membrane meets this requirement and will not present a health hazard to people.

See BRANZ Appraisal for full information.

Enviroclad (TPO) Waterproofing Membrane

Viking Roofspec

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Viking Enviroclad offers absolute watertight integrity for low-slope roofs.

NZ-Owned Business

Viking Enviroclad Roofing and Deck Membrane System has been assessed as a roof and deck waterproofing membrane on buildings within the following scope:

the scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, paragraph 1.1; or,
the scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
situated in NZS 3604:2011 Wind Zones, up to, and including Extra High; and,
with substrates of plywood or suspended concrete slab

Viking Enviroclad Roofing and Deck Membrane System has also been assessed for use as a roof and deck waterproofing membrane on specifically designed or existing buildings within the following scope:

subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.7 kPa; and,
with substrates of plywood or suspended concrete slab
with the weathertightness design of junctions for each specific structure being the responsibility of the building designer

Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (a), (c), (e), (h), (m) and (p) Viking Enviroclad Roofing and Deck Membrane System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b) and B2.3.2 (a), 15 years. Viking Enviroclad Roofing and Deck Membrane System meets this requirement.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c). Viking Enviroclad Roofing and Deck Membrane System meets these requirements.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Enviroclad Roofing and Deck Membrane System meets this requirement and will not present a health hazard to people.

BRANZ Appraised

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Enviroclad FBS (Fleece-Backed System) Membrane

Viking Roofspec

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Viking Enviroclad FBS (fleece-backed system) is Enviroclad with a 'fluffy' polyester layer that has been factory-laminated to the underside.

Energy Star

NZ-Owned Business

Viking Enviroclad FBS Membrane System is suitable for use as a roof and deck waterproofing membrane on buildings within the following scope:

the scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, paragraph 1.1; or,
the scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
situated in NZS 3604:2011 Wind Zones, up to, and including Extra High; and,
with substrates of plywood or suspended concrete slab.

Viking Enviroclad FBS Membrane System is also suitable for use as a roof and deck waterproofing membrane on specifically designed or existing buildings within the following scope:

subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.7 kPa; and,
with substrates of plywood or suspended concrete slab.
with the weathertightness design of junctions for each specific structure being the responsibility of the building designer.

Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (a), (c), (e), (h), (m) and (p) Viking Enviroclad FBS Membrane System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b) and B2.3.2 (a), 15 years. Viking Enviroclad FBS Membrane System meets this requirement.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.2 and E2.3.7 (b) and (c). Viking Enviroclad FBS Membrane System meets these requirements.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Enviroclad FBS Membrane System meets this requirement and will not present a health hazard to people.

Epiclad (EPDM) Rubber Waterproofing Membrane

Viking Roofspec

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Viking Epiclad is a ‘no nonsense’ membrane made from 100% EPDM (ethylene propylene diene monomer) rubber, with over 25-years of proven performance in New Zealand.

NZ-Owned Business

Viking Epiclad Membrane System has been appraised for use as a waterproofing membrane for buildings within the following scope:

scope limitations of NZBC Acceptable Solution E2/AS1, Paragrpah 1.1; and,
with timber supporting structures designed and constructed in accordance with the NZBC; and,
with nominally flat or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC; and,
with substrates of plywood sheet.

Epiclad Membrane System has also been appraised for use as a waterproofing membrane for external reinforced concrete and plywood roofs and decks for buildings within the following scope:

up to 3 storeys with a maximum height from ground to eaves of 10m and with a floor plan area limited only by seismic and structural control joints; and,
with the reinforced concrete structure designed and constructed in accordance with the NZBC; and,
with nominallly flat, curved or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC.

The Viking Epiclad BRANZ Appraisal is limited to roofs and decks within the following scope:

constructed to suitable falls (refer paragraph 12.1 -12.9 of the Viking Epiclad Membrane System BRANZ Appraisal); and,
with no steps within a deck level, no integral roof gardens and no down pipe discharging directly onto a deck.

The design and construction of the substrate and movement and control joints is specific to each building, and therefore the responsibility of the building designer and building contractor and is outside the scope of this appraisal.

Clause B1 STRUCTURE: Performance B1.3.1. Viking Epiclad Membrane System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years. Viking Epiclad Membrane System meets this requirement. See paragraph 9.1 of the Viking Epiclad Membrane System BRANZ Appraisal.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Roofs, decks, balconies, parapets and gutters incorporating Viking Epiclad Membrane System. See paragraphs 12.1 -12.9 of the Viking Epiclad Membrane System BRANZ Appraisal.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Epiclad Membrane System meets this requirement and will not present a health hazard to people.

BRANZ Appraised

Epiclad FBS (EPDM Fleece-Backed System) Rubber Waterproofing Membrane

Viking Roofspec

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Viking Epiclad FBS (fleece-backed system) is a roofing membrane where a 'fluffy' polyester layer is factory-laminated to the underside of the Viking Epiclad waterproofing membrane.

Viking Epiclad FBS Membrane has been appraised for use as a waterproofing membrane for buildings within the following scope:

scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1; and,
with timber supporting structures designed and constructed in accordance with the NZBC; and,
with nominally flat or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC; and,
with substrates of plywood sheet.

Viking Epiclad FBS Membrane has also been appraised for use as a waterproofing membrane for external reinforced concrete and plywood roofs and decks for buildings within the following scope:

up to 3 storeys with a maximum height from ground to eaves of 10m and with a floor plan area limited only by seismic and structural control joints; and,
with the reinforced concrete structure designed and constructed in accordance with the NZBC; and,
with timber supporting structures designed and constructed in accordance with the NZBC; and,
with nominally flat, curved or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC.

This Viking Epiclad FBS BRANZ Appraisal is limited to roofs and decks within the following scope:

constructed to suitable falls (refer paragraph 12.1 - 12.9 of the Viking Epiclad FBS Membrane BRANZ Appraisal); and,
with no steps within a deck level, no integral roof gardens and no down pipe discharging directly onto a deck.

The design and construction of the substrate and movement of control joints is specific to each building, and therefore the responsibility of the building designer and building contractor and is outside the scope of this appraisal.

Clause B1 STRUCTURE: Performance B1.3.1. Viking Epiclad FBS Membrane System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years. Viking Epiclad FBS Membrane System meets this requirement. See paragraph 9.1 of the Viking Epiclad FBS BRANZ Appraisal.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Roofs, decks, balconies, parapets and gutters incorporating Viking Epiclad FBS Membrane System meet these requirements. See paragraphs 12.1 - 12.9 of the Viking Epiclad FBS BRANZ Appraisal.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Epiclad FBS Membrane System meets this requirement and will not present a health hazard to people.

BRANZ Appraised

Roof Garden System

Viking Roofspec

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The focus on improving the quality of life in our urban environments and reducing the impact on our buildings, can be assisted with the installation of a Viking Roof Garden System.

NZ-Owned Business

The Viking Roof Garden System is suitable for use on buildings within the following scope:

with substrates of suspended reinforced concrete; and,
with each structure being subjected to specific structural engineering and weather-tightness design

Clause B1 STRUCTURE: Performance B1.3.1.
Clause B2 DURABILITY: Performance B2.3.1(b).
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1.

Gemini APP TorchOn Membrane

Viking Roofspec

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Viking Gemini APP is a robust and versatile membrane system ideally suited to New Zealand's North Island (except the Central Volcanic Plateau) and the Pacific Islands.

NZ-Owned Business

Viking Gemini APP is suited to tricky / confined roofs where it can be 'bled' in to vulnerable areas such as tight corners and awkward areas susceptible to leaks such as roof penetrations, internal corners and gutter junctions.

It is suitable for low-slope roofs (flat or curved), gutters and parapets, waterproofing beneath a floating deck, inland and coastal conditions, commercial and residential buildings.

Viking Gemini APP Waterproofing Membrane has been assessed as a roof waterproofing membrane on buildings within the following scope:

The scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, Paragraph 1.1; or,
The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
Situated in NZS 3604:2011 Wind Zones, up to and including Extra High; and,
With substrates of plywood or suspended concrete slab; and,
With a minimum fall for roofs of 1:30 (2 degrees)

Viking Gemini APP Waterproofing Membrane has also been assessed for use as a roof waterproofing membrane on buildings within the following scope:

Subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) of 6 kPa: and,
With substrates of plywood or suspended concrete slab

Clause B1 STRUCTURE: Performance B1.3.1 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (p). Viking GM Gemini A.P.P Waterproofing Membranes meet this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Viking GM Gemini A.P.P Waterproofing Membrane meet this requirement.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c). Viking GM Gemini A.P.P Waterproofing Membrane meets these requirements.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking GM Gemini A.P.P Waterproofing Membrane meets this requirement and will not present a health hazard to people.

BRANZ Appraised

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Lybra SBS TorchOn Membrane

Viking Roofspec

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Viking Lybra SBS is a robust and versatile membrane system ideally suited to New Zealand's South Island and the North Island's Central Volcanic Plateau.

NZ-Owned Business

Viking Lybra SBS is suited to tricky / confined roofs where it can be 'bled' in to vulnerable areas such as tight corners and awkward areas susceptible to leaks such as roof penetrations, internal corners and gutter junctions.

It is suitable for low-slope roofs (flat or curved), gutters and parapets, waterproofing beneath a floating deck, inland and coastal conditions, commercial and residential buildings.

Viking Lybra SBS Waterproofing Membrane has been assessed as a roof waterproofing membrane on buildings within the following scope:

The scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, Paragraph 1.1; or,
The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
Situated in NZS 3604:2011 Wind Zones, up to and including Extra High; and,
With substrates of plywood or suspended concrete slab; and,
With a minimum fall for roofs of 1:30 (2 degrees)

Clause B1 STRUCTURE: Performance B1.3.1 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (p). Viking GM Lybra S.B.S Waterproofing Membrane meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Viking GM Lybra S.B.S Waterproofing Membrane meets this requirement.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c). Viking GM Lybra S.B.S Waterproofing Membrane meets these requirements.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking GM Lybra S.B.S Waterproofing Membrane meets this requirement and will not present a health hazard to people.

BRANZ Appraised

CodeMark

Phoenix Super APAO

Viking Roofspec

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Viking's 'Platinum' torch-on solution can be installed anywhere in the world.

NZ-Owned Business

Viking Phoenix Super APAO is suited to tricky / confined roofs where it can be 'bled' in to vulnerable areas such as tight corners and awkward areas susceptible to leaks like roof penetrations, internal corners and gutter junctions.

It is suitable for low-slope roofs (flat or curved), gutters and parapets, waterproofing beneath a floating deck, inland and coastal conditions, commercial and residential buildings.

Viking Phoenix Super APAO Waterproofing Membrane has been assessed as a roof waterproofing membrane on buildings within the following scope:

The scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, Paragraph 1.1; or,
The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
Situated in NZS 3604:2011 Wind Zones, up to and including Extra High; and,
With substrates of plywood or suspended concrete slab; and,
With a minimum fall for roofs of 1:30 (2 degrees).
Viking Phoenix Super APAO Waterproofing Membrane has also been assessed for use as roof waterproofing membranes on buildings within the following scope:

Subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) of 6 kPa: and,
With substrates of plywood or suspended concrete slab.

Clause B1 STRUCTURE: Performance B1.3.1 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (p). Viking Phoenix Super APAO Waterproofing Membrane meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Viking Phoenix Super APAO Waterproofing Membrane meets this requirement.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c)Viking Phoenix Super APAO Waterproofing Membrane meets these requirements.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Phoenix Super APAO Waterproofing Membrane meets this requirement and will not present a health hazard to people.

BRANZ Appraised

WarmRoof System

Viking Roofspec

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The most commonly accepted definition of a warm roof (for low slope roofs) is 'a roof where the insulation is installed on top of the roof structure' i.e.

NZ-Owned Business

The Viking WarmRoof System has been appraised for use as an insulating roof on buildings within the following scope:

the scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1 with regards to building height and maximum floor plan areas; and,
on limited access flat roofs with concrete, plywood or steel structural decks subject to specific structural design; and,
with roofs constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
with roofs constructed to suitable falls (refer paragraph 15.3 and 15.4 of the Viking Warm Roof BRANZ Appraisal); and,
with no integral roof gardens; and,
situated in NZS 3604 Building Wind Zones, up to, and including Extra High

The Viking WarmRoof System has also been appraised for durability and thermal performance as an insulated roofing system on buildings that are the subject of specific design with no building height restriction. Building designers are responsible for the building design and for the incorporation of the Viking WarmRoof System into their design in accordance with the declared properties and instructions of Viking Roofspec.

Clause B1 STRUCTURE: Performance B1.3.1. The Viking WarmRoof System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. The Viking WarmRoof System meets this requirement. See paragraph 10.1 of the Viking WarmRoof BRANZ Appraisal.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. The Viking WarmRoof System meets these requirements. See paragraphs 15.1 — 15.9 of the Viking Warm Roof BRANZ Appraisal.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. The Viking WarmRoof System meets this requirement and will not present a health hazard to people.
Clause H1 ENERGY EFFICIENCY: Performance H1.3.1 (a). The Viking WarmRoof System will contribute to meeting this requirement. See paragraph 14.1 of the Viking WarmRoof BRANZ Appraisal.
Clause C/VM2 FIRE PERFORMANCE (of wall and ceiling linings) — ISO9705, Group 1S = highest possible rating.

BRANZ Appraised

WarmSpan Tray System

Viking Roofspec

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Viking WarmSpan is a warm roof that includes a proprietary steel tray substrate, supplied by Viking, to make up a complete roof system.

The Viking WarmSpan System has been appraised for use as an insulating roof on buildings within the following scope:

the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and maximum floor plan areas; and,
on limited access flat roofs with steel structural decks subject to specific structural design; and,
with roofs constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
with roofs constructed to suitable falls (refer paragraph 15.3 and 15.4 of the Viking Warm Roof BRANZ Appraisal); and,
with no integral roof gardens; and,
situated in NZS 3604 Building Wind Zones, up to, and including Extra High.

The Viking WarmSpan System has also been appraised for durability and thermal performance as an insulated roofing system on buildings that are the subject of specific design with no building height restriction. Building designers are responsible for the building design and for the incorporation of the Viking WarmSpan System into their design in accordance with the declared properties and instructions of Viking Roofspec.

Clause B1 STRUCTURE: Performance B1.3.1. The Viking WarmSpan System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. The Viking WarmSpan System meets this requirement. See paragraph 10.1 of the Viking Warm Roof BRANZ Appraisal.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. The Viking WarmSpan System meets these requirements. See paragraphs 15.1 - 15.9 of the Viking Warm Roof BRANZ Appraisal.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. The Viking WarmSpan System meets this requirement and will not present a health hazard to people.
Clause H1 ENERGY EFFICIENCY: Performance H1.3.1 (a). The Viking WarmSpan System will contribute to meeting this requirement. See paragraph 14.1 of the Viking Warm Roof BRANZ Appraisal.
Clause C/VM2 FIRE PERFORMANCE (of wall and ceiling linings) - ISO9705, Group 1S = highest possible rating.

BRANZ Appraised

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