Issue 28 – June 2011
NZS 3604 uses a number of definitions to describe where a component is located.
- An open subfloor is one where the subfloor ventilation is more than 7000 mm2 of clear opening for each m2 of floor area.
- A sheltered subfloor is one that has a ventilation area of up to 7000 mm2 of clear opening for each m2 of floor area (twice the minimum required).
- A closed space is a dry internal location not subject to airborne salts or rain wetting such as where rafters or wall studs are located.
Information supplied by BRANZ.
- NZS 3604:2011 Timber-framed buildings