flat roof system is a durable waterproof external membrane that can be applied
on flat roofs.
product is Pacoflex, which is polymer modified mastic asphalt. It comprises of
limestone aggregates bound together by asphalt cement.
system is laid on a concrete or plywood substrate. A separation layer is
required between the substrate and mastic asphalt topping, which is formed in
two 10mm layers. A solar reflective UV paint in grey ,White or green can be applied for additional
protection and aesthetic appearance.
Mastic asphalt has been used to waterproof many New Zealand buildings for over 100 Years.
Scope of use
A superior flat roof system can be applied to new or existing commercial buildings.
can be applied on flat to moderately sloped roofs. due to its monolithic nature it can easily be applied to any shape or surface easily. Also due to its seamless finish and thickness of 20mm it has able to be accepted on many New Zealand buildings where there has been a restriction in fall.
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(a), B1.3.3(c), B1.3.3(e), B1.3.3(q)
- Clause B2 Durability: Performance B2.3.1(b), B2.3.2
- Clause C6 Structural stability: Performance C6.2(a), C6.2(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 F2 Hazardous building materials: Performance F2.3.1
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
Pure Asphalt waterproofing system Pacoflex Approval Inspection Testing Certification
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
tested to UK National Building Regulation Section C.2 UKAS Accredited.
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
- Auckland War Memorial
- School of Architecture building roof, University of Auckland
- TVNZ Building
- Telecom House
- NZ Defense Force Ardmore
- The concrete substrate must be designed in accordance with NZS3604:2011 or AS/NZ 1170.
- 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.
- Fall must be greater than 1:30 for roofs, 1:40 for decks and 1:100 for gutters.
All work to be carried out by approved Asphaltech
applicators experienced in mastic asphalt work.
substrate must be dry, with no sharp projections.
roof systems should be inspected twice a year to check for damages and
should be removed from the system.
- Approved qualified contractor to perform any repair work.
to Asphaltech Waterproofing maintenance schedule.
||ISO 9002 Quality Management Systems