Pacoflex is a durable external waterproof membrane, which allows for
the selection of various kinds of vegetation from intensive growing mediums to sedum blankets and bio-diverse brown roofs. Mastic asphalt is one of the oldest green roof systems around It has been used in this situation since the early 1900's
Pacoflex is a polymer modified mastic asphalt. It comprises of
limestone aggregates bound together by asphalt cement and advanced polymers
system must be laid on a concrete , plywood or suitable insulation substrate. A separation layer is
required between the substrate and mastic asphalt topping, which is formed in
two 10 mm layers. For a green roof system , Geo-textiles , drainage cells and optional XPS insulation are
applied over the mastic asphalt system. The planting forms an external layer and can be of an intensive or extensive planting.
Scope of use
green roof system is applied on flat to moderately sloped roofs.
It is suitable in new
or existing commercial buildings.It can be used for planter boxes,podiums or green roofs on residential or commercial buildings. 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,. Mastic asphalt is laid 20mm 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
- Clause B2 Durability: Performance B2.3.1(a), B2.3.1(b), B2.3.2(a)
- Clause C6 Structural stability: Performance C6.2
- Clause D1 Access routes: Performance 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)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2, E2.3.7
- Clause F2 Hazardous building materials: Performance F2.3.1
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)
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
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.
2003 Flat roofs with continuously
supported coverings. Code of practice
accordance to European standard: BS EN 13108-6:2006 Accepted
as New Zealand Standard Bituminous mixtures. Material specifications. Mastic asphalt
144: 1972 (Durability) Pacoflex
life serviceability up to 50 years
resistance tested to UK National Building Regulation Section C.2 UKAS
toxic once cured see IKO Product Safety Sheet
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
Mastic asphalt is the oldest waterproofing in the world. It has been used successfully in New Zealand for over 100 years or latest polymer systems have more durability, flexability and ease of application than old variety's of mastic asphalt.
Asphaltech product has been used in New Zealand now for 10 years featuring on a range of large apartment buildings, Car parks , old heritage buildings and modern shopping centers.
TVNZ re-roof 2600m2 , The ANZ towe , Bellus Apartments and Chambers in Station to name a few of our most recent projects.
This covers the use of the Asphaltech 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
The Asphaltech 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
The system can be configured to be:
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
- A car
park trafficable surface.
- Part of a
green roof system.
Part of a insulated roof system .
The Asphaltech 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 Asphaltech 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 Asphaltech Waterproofing Suppliers Ltd approved
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
• 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 flashing's to expansion joints and that the all components are secure.
• Check the up stand flashing's to plant support legs/up stands.
• Check the up stands and flashing's to pipe penetrations.
• Examine all mastic seals and repair/replace as necessary.
• Check walkways and around access
Mastic asphalt 100%
Mastic Asphalt industry was the first in gain carbon Neutral
As mastic asphalt has a longer life cycle than most products it is therefore more sustainable.
||ISO 9001 (Quality Management)
||ISO 9002 Quality Management Systems