Technical Statement
Product Description
Covertek 407 is a synthetic fire-retardent underlay suitable for Early Close wall applications, allowing works to continue inside the building before the exterior wall cladding is fully in place. Alternatively, it can also be used as a traditional wall underlay to manage water ingress, condensation, and water vapour transfer in exterior wall systems.
Scope of use
When installed using the Early Close Installation Guide, interior work on the building can continue for 120 days before the external cladding
is installed subject to the roof cladding, soffit linings, windows and doors being installed.
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, B2.3.1(a), B2.3.1(b)
Clause B2 DURABILITY: Performance B2.3.1 (a) not less than 50 years, B2.3.1 (b) 15 years
and B2.3.2. Thermakraft Covertek 407 Early Close Wall Underlay meets these requirements
- Clause C3 Fire affecting areas beyond the fire source: Performance C3.4(c)
Clause B2 DURABILITY: Performance B2.3.1 (a) not less than 50 years, B2.3.1 (b) 15 years
and B2.3.2. Thermakraft Covertek 407 Early Wall Underlay meets these requirements
- Clause E2 External moisture: Performance E2.3.2
Clause E2 EXTERNAL MOISTURE: Performance E2.3.2. When used as part of the roof or wall
cladding system, Thermakraft Covertek 407 Early Close Wall Underlay contributes to meeting this
requirement.
- Clause F2 Hazardous building materials: Performance F2.3.1
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Thermakraft Covertek 407 Early Close Wall Underlay meets this requirement.
Notes
Compliance
Wall Application - Can be used as a wall underlay within the scope of limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1, with regards to building height and floor plan area. Or within the scope limitations of NASH Building Envelope Solutions, Paragraph 1.1 for steel framed buildings.
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
Meets the Performance Requirements of NZBC Clauses
B2, Durability (B2.3.1 (a) 50 years, B2.3.1 (b) 15 years
and B2.3.2), C3 Fire Affecting Areas Beyond the Fire
Source C3.4 (c) E2 External Moisture, and F2 Hazardous
Building Materials F2.3.1, providing:
- It is not damaged.
- Is installed in accordance with instructions
- Is not left exposed for more than 120 days.
- Is installed by or under guidance of Licensed Building
Practitioners.
- Is compatible with cladding system used*
* Note: specifiers and product user must confirm roof and
wall cladding
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Product Criteria
Quality Assurance
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ISO 9001 (Quality Management) |
Relationships
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Member of New Zealand Green Building Council |
 |
New Zealand Made |
Building Product Information Requirements
Manufacturer
Legal Trading Name:
Kingspan Insulation New Zealand Ltd
Business Email:
technical@kingspaninsulation.co.nz
Contact Number/s:
0800 806595
Product Identifier
CTS1250025 CTS1250050 CV2550075 CV2740050
Warnings
This product has no warnings associated with it.
