Technical Statement
Product Description
Scope of use
The inverted system or protected membrane roof (PMR) is applied on flat to moderately sloped roofs.
It is suitable in new
or existing commercial buildings. It can be laid on a range of substrates but mainly concrete due to the weight loading of the system.
Due to its durability and seamless nature mastic asphalt can be laid to minimal falls including Zero and has been applied on many New Zealand buildings. Neuchâtel Mastic Asphalt is laid 20 mm thick and is monolithic therefore it cannot be penetrated by roots and is suitable for potable water.
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3, B1.3.3(b), B1.3.3(c), B1.3.3(f), B1.3.3(h), B1.3.3(m), B1.3.3(q), B1.3.4
B1 Structure B1.3.1; B1.3.2; B1.3.3 (b), (c), (f), (h), (m), (q); B1.3.4
- Clause B2 Durability: Performance B2.3.1(a), B2.3.1(b), B2.3.2(a)
B2 Durability - B2.3.1 (a), (When Concealed ) or B2.3.1 (b) (not concealed).B2.3.2(a)*concealed when used as a substrate incorporated in a green warm or inverted roof.
- Clause C6 Structural stability: Performance C6.2
n/a
- Clause D1 Access routes: Performance D1.3.3(d)
D1 Access Routes D1.3.3 (d)
- Clause E1 Surface water: Performance E1.3.1, E1.3.3(a), E1.3.3(b), E1.3.3(c), E1.3.3(d), E1.3.3(e), E1.3.3(f)
n/a
- Clause E2 External moisture: Performance E2.3.1, E2.3.2, E2.3.7
E2 External Moisture - E2.3.1; E2.3.2; E2.3.7
- Clause F2 Hazardous building materials: Performance F2.3.1
F2 Hazardous Building Materials - F2.3.1 And will contribute to compliance with; B1 Structure - B1.3.3 (d); (n)
Notes
Complies with the
Building Code of New Zealand:
If installed and maintained in accordance with the
conditions of this certificate, the Asphaltech Mastic Asphalt Roof
Waterproofing and Paving System will comply with;
B1 Structure B1.3.1; B1.3.2; B1.3.3 (b), (c), (f),
(h), (m), (q); B1.3.4
B2 Durability - B2.3.1 (a), (When Concealed ) or B2.3.1 (b) (not concealed).B2.3.2(a)
*concealed when used as a substrate incorporated in a green warm or inverted roof.
D1 Access Routes D1.3.3 (d)
E2 External Moisture - E2.3.1; E2.3.2; E2.3.7
F2 Hazardous Building Materials - F2.3.1
And will contribute to compliance with;
B1 Structure - B1.3.3 (d); (n)
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
CodeMark CMNZ70012
BBA, IKO Roof Waterproofing systems Pacoflex Approval Inspection Testing Certification 17/5449 07/09/2017.
BSI Quality Management System !SO 9001;2008
BS: 8218:1998 Code of practice for mastic asphalt
roofing. UKAS Tested in relation to fire.
BS: 6229:
2003 Flat roofs with continuously
supported coverings. Code of practice
In
accordance to European standard: BS EN 13108-6:2006 Accepted
as New Zealand Standard Bituminous mixtures. Material specifications. Mastic asphalt
BRE Digest
144: 1972 (Durability) Pacoflex
life serviceability up to 50 years
Moisture
resistance tested to UK National Building Regulation Section C.2 UKAS
Accredited
Not
toxic once cured see IKO Product Safety Sheet
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
Neuchâtel Mastic Asphalt is the oldest waterproofing in the world. Successfully used in New Zealand for over 100 years, the latest polymer systems have more durability, flexibility and ease of application than old varieties of mastic asphalt. From Mansion House on Kawau Island, to the Beehive in Wellington, to Auckland's War Memorial Museum, Neuchatel Mastic Asphalt has been used on many of New Zealand's most historic and prestigious structures for over a century. It has also been used on a number of modern buildings, including appartments, car parks and shopping centres. Recent projects include Newmarket's Westfield Mall, The Greenhouse in Ponsonby, Victoria Lane Residences in Remuera and Fabric Apartments in Onehunga.
Product Criteria
Design requirements
This covers the use of the Neuchâtel Mastic Asphalt Roof Waterproofing and Paving System as a
waterproof roofing membrane and as a waterproofing and paving system for
elevated decks and car parks for cars, light commercial and heavy goods
vehicles.
The Neuchâtel Mastic Asphalt Roof
Waterproofing and Paving System may be used where the minimum gradient of the
substrate structure is completely flat (less than 1:80) including nominally
zero pitch.
The system can be configured to be:
- Suitable
for direct foot traffic
·
- A suitable substrate external pavers, tiles or concrete for pedestrian traffic,
and for pavers or tiles on paver supports, for use on terraces, balconies or
podium.
- A car
park trafficable surface.
- Part of a
green roof system.
- Part of an insulated roof system.
Installation requirements
The Neuchâtel Mastic Asphalt Roof Waterproofing and
Paving System must be installed using the traditional techniques for mastic
asphalt described in the relevant Clauses of BS 8218: 1998, and in accordance
with the Neuchâtel Technical Manual and Details
Timber substrate structures may be designed in
accordance with NZS3604 as a heavy roof, provided the mastic asphalt membrane
does not exceed 22 mm. All plywood sheets must be CCA treated to H3.2. The
plywood must be a minimum of 17mm thickness complying with AS/NZS 2269.0
Concrete and other specifically designed substrates
must be designed in accordance with verification method B1/VM1 using the
structural design actions in AS/NZS1170
A separation layer is required between the substrate
and mastic asphalt topping
The substrate must be dry, with no sharp projections.
All work must be carried out by Neuchâtel Waterproofing Ltd approved
applicators.
Maintenance requirements
All maintenance surveys should be carried out yearly and in the Autumn.
• It is important to check that roof outlets are functioning and gratings are not blocked. Remove
debris from the roof but do not flush silt or dead leaves down outlets. In areas where taller
trees are adjacent to the roof, inspections may be required more frequently.
• Note the general condition of the waterproofing finishes and report any damaged areas
immediately.
• Check waterproofing to roof light kerbs.
• Check roof light domes for signs of damage or deflection.
• Check perimeter details and up stands, ensuring that the metal capping, flashing's, edge trims
and mortar pointing to chase details are secure.
• Check flashings to expansion joints and that the all components are secure.
• Check the up stand flashings to plant support legs/up stands.
• Check the up stands and flashings to pipe penetrations.
• Examine all mastic seals and repair/replace as necessary.
• Check walkways and around access
Warrantees
https://neuchatel.co.nz/architectural-info/
Environmental
Mastic asphalt 100%
Recyclable, zero waste packaging and no product expiry date.
Mastic Asphalt industry was the first in gain carbon neutral rating.
As mastic asphalt has a longer life cycle than most products it is therefore more sustainable.
Quality Assurance
 |
ISO 9001 (Quality Management) |
 |
Date last validated:
27 June 2024 |
 |
Date last updated:
27 June 2024 |