Thermakraft Window Sealing Flashing Tapes can be used as a flexible flashing system around window and door joinery openings on timber and steel framed buildings within the following scope: The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and, with a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2; and, With wall cladding systems complying with NZBC Acceptable Solution E2/AS1; or a valid BRANZ appraisal that specifies a flexible flashing system; and, With wall underlays compatible with the flashing tape; and, situated in NZS3604 Wind Zones up to, and including ‘Extra High’.
Thermakraft Window Sealing Flashing Tapes meet the Performance Requirements of NZBC Clauses B2, Durability (B2.3.1 [a] 50 years, B2.3.1 [b] 15 years and B2.3.2), E2 External Moisture, and F2 Hazardous Building Materials.
Thermakraft Window Sealing Flashing Tapes are expected to have a serviceable life equal to that of the cladding, when installed in accordance with this application and installation sheet, provided they are not exposed to the weather or ultra-violet for a total number of no more than 42 days, or are damaged on installation.
Thermakraft Window Sealing Flashing Tapes are designed to work on all Thermakraft based building underlays that meet the requirements of NZBC E2/AS1 Table 23, and on all Thermakraft BRANZ appraised wall underlays. Aluband Sealing Flashing Tapes should be installed when temperatures are above 5ºC
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 E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1