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Thermakraft Thermathene Orange 300μm

Thermakraft Thermathene Orange 300μm is a super high strength concrete underlay, tear resistant polythene film used as a damp proof membrane.

Key Features
  • BRANZ Appraised
  • Concrete Underlay and moisture barrier
  • High puncture and tear resistance
Scope of Use

Thermathene Orange is intended for use as a dampproof membrane separating the concrete slab from ground soil. The product acts as a vapour barrier to stop ground moisture penetrating the concrete.

Thermathene Orange Concrete Underlay has been appraised for use as a DPM under concrete slab on-ground floors complying with NZS 3604 or NZS 4229.

Thermathene Orange Concrete Underlay has also been appraised for use as a DPM on buildings subject to specific design within the following scope:

  • Where the DPM is laid on a granular base prepared to not damage the DPM; and,
  • Where the DPM is adequately protected against damage in service


Limitations on Use
  • Thermathene Orange must be sealed with Thermakraft White General Purpose Tape, Thermakraft Premium Joining Tape or Aluband Window Flashing Tape at the lap joints to form a complete vapour barrier
  • Maximum weather or UV exposure is 30 days
  • Cannot be used as a roof or wall underlay
Statement of Building Code Compliance

Thermathene Orange is an Acceptable Solution as per the requirements of the NZBC. Thermathene Orange meets the requirements of NZBC 3604:2011 Clause, NZBC Acceptable Solutions E2/AS1, Table 23 and NZS 4229:2013 Clause 7.4 & 7.6.

When Thermathene Orange is used and installed as a damp-proof membrane as per Thermakraft’s literature, the product will meet or contribute to meeting the following provisions of the NZBC: Clause B2 Durability: Performance B2.3.1 (a), 50 years, Clause E2 External Moisture: Performance E2.3.3 & Clause F2 Hazardous Materials: Performance F2.3.1.

Other Performance Attributes

Thermathene Orange Concrete Underlay is a suitable DPM material (polyethylene sheet), and is expected to have a serviceable life of at least 50 years provided it is installed and maintained in accordance with this Appraisal and is continually protected from sunlight and ultra-violet (UV) radiation.

Thermathene Orange Concrete Underlay may be exposed for a maximum period of 30 days before the concrete slab is placed.

BRANZ Appraised
BRANZ Appraised
Data Sheet

Issue 4, April 2020

Quick Reference Guide


Thermakraft on Masterspec
BRANZ Appraisal 1104

No1104 [2020] 19 May 2020

Installation and Operation

Issue 3, April 2020

Kingspan Thermakraft Warranty Statement

Issue 3.1, Sep 2022

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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