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Viking StrandSarking is an H3.1 treated strand board; designed by Juken New Zealand, as a substrate for pitched and low-slope membrane roofs.
As StrandSarking is more rigid and spans further than plywood, it reduces the visibility of sheet joins under asphalt shingles and forgives unevenness in the structure creating a flatter and sharper looking roof.
Unlike plywood, the extra length spans an extra truss; resulting in a stronger substrate and less double-nailing at sheet edges.
The manufacture process involves the soaking of individual woodchip strands in the treatment before they are pressed into StrandSarking sheets. This ensures every sheet is fully treated throughout its entire thickness, as opposed to the conventional methods of treating wood, where untreated sheets are merely sprayed post-manufacture with the assumption that the treatment will penetrate to the board's centre. The treatment used for StrandSarking is solvent-free.
StrandSarking has no face grain so it can be laid in any direction (minimising wastage) and can span up to 900mm.
StrandSarking has been appraised for use on buildings within the following scope:
See BRANZ Appraisal 891 for full information.
Strandsarking has not been appraised for the following situations:
Installation shall be carried out by a Viking Roofspec trained and licensed installer. Installation shall be undertaken in accordance with all relevant technical information related to the selected installation method, including information contained within the BRANZ Appraisal No. 891 (2015), BRANZ Appraisal No. 276 (2012) and Viking StrandSarking substrate checklist.
The product will, if employed in accordance with the supplier’s installation and maintenance requirements, assist with meeting the following provisions of the New Zealand Building Code (NZBC):
See BRANZ Appraisal 891 for full information
For over 50 years, Viking Roofspec have supplied roofing and waterproofing materials, and combining leading-edge function with design flair to keep water out — for good.Product Enquiries
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