Strandsarking Roof Sarking
- Appraisal number 891
- Valid from
- Information provider
- BRANZ Limited
- Information type
- BRANZ Appraisal
Strandsarking is an engineered woodpanel sheet material for use as a roof sarking under asphalt shingles and other similar types of roofing materials.
Strandsarking is treated to hazard class H3.1.
Strandsarking has been appraised for use on buildings within the following scope:
- with timber roof framing designed in accordance with NZS 3604 or NZS 4229, or timber roof members subject to specific design; and
- in NZS 3604 Wind Zones up to and including Extra High; and,
- maximum eaves height of 10 m above the ground; and,
- snow loads up to 1 kPa; and,
- roof pitch of at least 9o; and,
- with roof trusses or framing at maximum of 900 mm centres; and,
- with roofing materials up to 150 kg/m2.
Strandsarking must be installed in accordance with the Technical Literature.
Strandsarking in the following situations is outside the scope of this Appraisal:
- as a diaphragm.
- on flat roofs, decks, trafficable areas or roofs with a pitch of less than 9o.
- as a substrate for membrane roofs.
Note: Strandsarking for low-slope membrane roofs is covered in BRANZ Appraisal No. 946 (2016).