Technical Statement
Product Description
Scope of use
In accordance with NZ3604, clause 7.4.
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:
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
Hermpac Watershed™ Decking Species Guide
Hermpac Watershed™ Decking Fixings Guide
Wood-X Technical Data Sheet
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Product Criteria
Design requirements
Watershed™ decking is designed to be used as a decking timber fixed on buildings in accordance with NZS 3604 (2011), clause 7.4.
Installation requirements
Using the Hermpac hole template, mark hole centre 15mm from edge of board for wide board decking (140mm x 21mm) and 12.5mm from edge of board for narrow board decking (90mm x 21mm and 65mm x 21mm). When using the Hermpac countersunk decking screws, fixings must be pre-drilled using the Hermpac deck drill and countersinking bit. This bit can be adjusted to drill through the decking board only and will give the correct depth for the Hermpac 65mm x 12 gauge stainless decking screw head.
Using a power driven screwdriver, drive screws into the deck surface to the correct depth. Take care not to overdrive the screw as this may result in the screw heads being damaged. Narrow board deck profiles (90mm x 21mm and 65mm x 21mm) can be nailed using an annular grooved 65mm x 3.25mm nail, but screw fixing is recommended.
Maintenance requirements
Building owners are responsible for the maintenance of the Hermpac Watershed™ decking system. Annual inspections must be made. Any damaged areas or areas showing signs of deterioration which would allow degradation of the timber must be repaired immediately. Coatings must be maintained in accordance with the relevant manufacturer’s instructions. Regular cleaning (at least annually) of the deck surface with water and a mild detergent is recommended to remove grime, dirt and organic growth, to maximise the life and appearance of the decking. Recoating of the deck surface with a penetrating oil is recommended when deck shows signs of crazing.
Warrantees
Refer datasheets.
Environmental
Hermpac Purpleheart, Tonka, Accoya/Accoya Grey, Kwila and Kanda timber can be supplied with FSC full Chain of Custody certification on request.
Hermpac timber species are natural timbers and are all chemical or treatment free.
Relationships
 |
New Zealand Made |
|
|
FSC
SGS-COC-008082 |
 |
Date last validated:
29 November 2023 |
 |
Date last updated:
29 November 2023 |