SEPARATE SOFFIT SECTION
This new Masterspec generic section 4239 SOFFIT CLADDING relates to the supply and fixing of cladding to the underside of external soffits, verges and eaves, in particular, those suitable for housing and small commercial buildings. The section allows soffit cladding to be specified separately from the wall cladding, overcoming problems of the past where the soffit and wall cladding where combined in the same sections. Being in the same section sometimes caused a lot of customising work if the two claddings where not from the same manufacturer. It also caused issues with the titling of sections.
Why 'soffit cladding' as opposed to the traditional term 'soffit lining'? As you may know, in line with New Zealand and Australian Standards, Masterspec uses the term cladding to mean external coverings to framing and lining to mean internal coverings to framing. The traditional term soffit lining was used to identify internal and external soffits, but as this section is strictly external Masterspec uses the technically correct term cladding.
The Q&A for this section allows for the selection of E2/AS1 compliant soffit materials (plywood and fibre cement sheet), as well as possible alternative solutions such as timber board, sarking and shiplap weatherboards. Also included is the flashing required at the soffit/wall cladding junction for reverse-slope eaves situations, where the angle between the sloping soffit and the vertical line of the wall cladding is within the range of 91° to 115°. This acceptable solution limits the pitch line of any roof with reverse sloping eaves to 25°, assuming the soffit pitch matches that of the roof.
Refer to E2/AS1, clause 5.3 Soffits, and figure 8A for acceptable soffit/wall junction details.Look for 4239 SOFFIT CLADDING (available in Standard, Basic and Landscapes).