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Thermakraft Covertek 215

Kingspan Thermakraft Covertek 215 is an economic, versatile lightweight roof underlay designed as a superior alternative to bituminous building paper when a fire-retardant underlay is NOT required. Covertek 215 is shrink-resistant and lightweight making it easy to handle and install.

Key Features
  • Tear resistant and strong
  • Affordable, lightweight synthetic underlay
  • BRANZ appraised
Scope of Use

Designed for use as a roof underlay within the following scope:

  • The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1, with regards to building height and floor plan area
  • Situated in NZS3604 Wind Zones up to, and including, ‘Extra High’ (Roof only)

Refer BRANZ Appraisal No 1229 (2023) for full details.

  • Suitable with masonry tile, metal tile or profiled metal roof cladding
  • Suitable for timber or steel framed buildings — Direct fix or cavity fix
  • Self-supporting in roof pitch application greater than or equal to 10 degrees (Refer to installation guide)
  • Will provide temporary weather protection during construction (maximum 7 days), same day coverage recommended
  • Covertek 215 may be installed during adverse conditions (rain/snow) without affecting durability or performance
  • Suitable for use under dark coloured roofs
Limitations on Use
  • Cannot be used as a wall underlay
  • Must NOT be exposed to the weather or UV for more than 7 days
  • Covertek 215 has an AS1530 Part 2 flammability index of greater than 5
Statement of Building Code Compliance

 Covertek 215 Roof Underlay, if used, designed, installed and maintained in accordance with the statements and conditions of the BRANZ Appraisal, will meet, or contribute to meeting the following provisions of the NZBC:

  • Clause B2 DURABILITY: Performance B2.3.1 (a), not less than 50 years, B2.3.1 (b), 15 years and B2.3.2. Covertek 215 Roof Underlay meets these requirements. See Paragraphs 9.1 and 9.2
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.2. When used as part of the roof cladding system, Covertek 215 Roof Underlay will contribute to meeting this requirement. See Paragraphs 12.1 and 12.2
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Covertek 215 Roof Underlay meets this requirement and will not present a health hazard to people
BRANZ Appraised
BRANZ Appraised
Data Sheet

Issue 1.0 Jan 2023

Quick Reference Guide


BRANZ Appraisal: Covertek 215

Appraisal No. 1229 [2023]

Installation and Operation

Issue 1.0 Jan 2023

Kingspan are New Zealand’s leading provider of high-performance insulation products and complementary Thermakraft range of premium wall & roof underlay products, flashings tapes & underlay mesh.

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