Technical Statement
Scope of use
The duroTUF TPO membrane is used to provide waterproofing protection on commercial, apartments, residential roofs, decks and balconies with a heat weldable accessory range which is fully compatible providing the best waterproofing protection system available on low slope roofs.
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 B2 Durability: Performance B2.3.1(b)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2, E2.3.6
- Clause F2 Hazardous building materials: Performance F2.3.1
Notes
The duroTUF TPO membrane will meet the following provisions
B2 Durability B2.3.1(b)
E2 External Moisture E2.3.1 , E2.3.2 and E2.3.6
F2 Hazardous Building Materials F2.3.1
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
AS/NZS 2269 Plywood - Structural
BRANZ Good Practice - Membrane Roofing
AS/NZS 1170:2002 Structural Design action - general principles
NZS3101:2006 The design of Concrete Structures
NZS 3604:2011 Timber Framed Buildings
Acceptable Solutions and Verification Methods for NZBC External Moisture Clause E2
The Building Regulations 1992
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
 |
BRANZ Appraisal
950 |
|
|
|
Use in Service History
The in service history of TPO membranes in New Zealand is now 15 years without any issues.
Product Criteria
Design requirements
Plywood and concrete substrates to be clean and fully dry/cured.
Plywood: Construction Plywood grade H3.2 CCA
treated kiln dried 17mm thick for roofs,19mm thick for decks.
Concrete: smooth surface finish to be either U2
wood float or U3 steel trowel to NZ 3114.
Specified falls:
Roofs - 2º slope (1:30)
Decks - 1.5º slope (1:40)
Gutters - 1º slope (1:100)
Installation requirements
Refer the Waterproofing Systems installation guidelines and
specifications.
Only installed by licenced LBP registered
Waterproofing Systems NZ ltd applicators.
Quality Control checksheets must be completed for
each job and kept as a record of evidence to ensure the installation meets
WPSNZ specification.
The duroTUF TPO system should be installed in dry conditions.
The substrate must
have a maximum moisture content of 20% for plywood and 75% RH for concrete at
the time of laying.
Substrate falls for the installation are correct.
Dropper outlets and scuppers are installed to
specification.
Cut-back primer is applied at the correct application rate.
Installation of duroTUF TPO membrane system.
Maintenance requirements
Refer to the Care & Maintenance instructions available on our
website and are attached to the Warranty document.
Warrantees
When installed to specification and subject to normal environmental
conditions and use, the duroTUF TPO membrane system will exceed 20 year period
when properly maintained.
A 20 Year material warranty is issued on receipt of Quality
Control Checksheet/s and warranty application.
Environmental
duroTUF TPO membrane is a friendly environmental choice.
White duroTUF TPO is energy star compliant with an SRI (Solar Resistance Index) of 101.
An aspect of sustainable design that is becoming more and more important as the global demand for energy grows, for example, we're using more recycled content.
duroTUF TPO membrane is 100% recyclable.
Quality Assurance
 |
ISO 9001 (Quality Management) |
