Chase CONCRETE FINISH, Installation Manual

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3.2 Dampness and Weatherproofing Performance
Chase EPS External Wall Cladding System complies with the NCC 2019 performance requirements for
weatherproofing and dampness.
This has been confirmed by testing in accordance with the verification method V2.2.1 in the NCC 2019.
This verification method requires that a test specimen is constructed and tested so that the weatherproofing
performance of many of the common combinations of details found in normal construction practice can be
examined.
In accordance with V2.2.1, weatherproofing compliance is demonstrated for an external wall with;
• Serviceability limit state design wind pressures of not more than +0.82kPa & -1.23kPa, this includes up to
AS 4055 N4 Wind Classification (note that 50mm thickness panel is only up to N3 applications only due
to strength); and
• Includes only windows that comply with AS 2047 (Windows and external glazed doors in buildings), and
has a Risk Score of 20 or less determined in accordance with NCC 2019, BCA Volume 2 Table V2.2.1a, as follows.
Table V2.2.1a - Risk factors and scores
(Credit: The National Construction Code Series 2019© as released by the Australian Building Codes Board on behalf of the Commonwealth of Australia and States and Territories of Australia.
http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.)
Risk factor Category Risk severity Score
Wind region Region A (AS/NZS 1170.2)
Low to medium 0
Region B (AS/NZS 1170.2)
Region C (AS/NZS 1170.2) High 1
Region D (AS/NZS 1170.2) Very high 2
Number of storeys One storey Low 0
Two storeys in part Medium 1
Two storeys High 2
More than two storeys Very High 4
Roof/wall junctions Roof-to-wall junctions fully protected Low 0
Roof-towall junctions partially exposed Medium 1
Roof-to-wall junctions fully exposed High 3
Roof elements finishing within the boundaries formed by the external walls Very High 5
Eaves width Greater than 600mm for single storey Low 0
451-600mm for single storey; or greater than 600mm for two storey Medium 1
101-450mm for single storey; or 0-450mm for two storey; or less than
600mm for above two storey
High 3
0-100mm for single storey; or 0-450mm for two storey; or less than 600mm
for above two storey
Very High 6
Envelope complexity Simple shape with single cladding type Low 0
Complex shape with no more than two cladding types Medium 1
Complex shape with more than two cladding types High 3
As for high risk but with fully exposed roof-to-wall junctions Very High 6
Decks, porches and
balconies None; or timber slat deck or porch as ground level Low 0
Fully covered in plan view by roof; or timber slat deck attached at first or
second floor level
Medium 2
Balcony exposed in plan view at first floor level; or balcony cantilevered at
first floor level
High 4
Balcony exposed in plan view at second floor level or above Very High 6