In Wall Applications: 

• UNI Flexible air barrier is designed for use under direct fixed and non-direct fixed wall cladding on timber framed and steel framed buildings.  
• Uni is manufactured from high quality synthetic spun bonded material with high UV qualities and waterproofing qualities. 

Timber Framed Buildings:

• UNI Flexible air barrier has been appraised for use on timber framed buildings within the following scope: 
• The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and  
• With absorbent and non-absorbent wall claddings directly fixed to the frame; and
• With absorbent and non-absorbent wall claddings installed over an 18mm minimum drained cavity; and, 
• With masonry veneer in accordance with NZBC Acceptable Solution E2/AS1; and, 
• Situated in NZS 3604:2011 wind zones up to and including ‘Very high’.

Steel Framed Buildings:

• UNI Flexible air barrier has been appraised for use on steel framed buildings within the following scope: 
• The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and  
• With absorbent and non-absorbent wall claddings directly fixed to the frame; and
• With absorbent and non-absorbent wall claddings installed over an 18mm minimum drained cavity; and,
• With masonry veneer in accordance with NZBC Acceptable Solution E2/AS1; and, 
• Situated in NZS 3604:2011 wind zones up to and including ‘Very high’.

Rigid Wall Underlays

• UNI Flexible air barrier has been appraised for use as a flexible wall underlay over rigid wall underlays on timber and steel framed buildings within the following scope: 
• The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and  
• With absorbent and non-absorbent wall claddings directly fixed to the frame; and
• With absorbent and non-absorbent wall claddings direct fixed to framing and installed over an 18mm minimum drained cavity; and, 
• With masonry veneer in accordance with NZBC Acceptable Solution E2/AS1 for timber framed building or specific design for steel framed buildings; and, 
• Situated in NZS 3604:2011 wind zones up to and including ‘Extra high’.

Installation Manual needs to be read before application in conjunction with the Certmark UNI assessment brief.

General Installation Instructions:

• Fix with the printed side out
• Run the wrap horizontally
• Pull taut over the framing before fixing
• Only to be fixed with Masons UNI Fasteners either with a gun or hammer
• Be lapped not less than 75mm at horizontal joints; Have upper sheets lapped over lower sheets to ensure that direction of laps will allow water to be shed to outside of the wall underlay
• Be lapped not less than 150mm over studs at vertical joints 
• Extend 50mm below bottom plate or bearer
• Uni Nail and Screw washers — It is important to secure UNI with masons UNI 32mm Nail/washer fasteners
• For steel frame use UNI washers with either a Phillips or square drive self-drilling screw.

The following tests have been carried out in accordance with NZBC Acceptable Solution E2/AS1 Table 23:

• Tensile strength, edge tear resistance with AS/NZS 4200:2017;
• Resistance to water vapour transmission in accordance with ASTM E96;
• Resistance to water penetration in accordance with AS/NZS 4201.4:1994;
• Surface water absorbency in accordance with AS/NZS 4201.6:1994;
• Air resistance to BS 6538.3:1987;
• Shrinkage in accordance with AS/NZS 4201.3:1994;
• pH of extract in accordance with AS/NZS 1301.421s:1998;
• Beal weathertightness test 112 a modification from AS/NZS 4284:2008 and E2/VM1

UNI is a newly developed product and is in use in multiple builds Nationwide

• UNI is a 230gsm non-woven breathable synthetic flexible air barrier, reinforced by a fibreglass scrim
• UNI is water resistant and designed to provide temporary protection from weather conditions and UV exposure to timber framing without the installation of the cladding, which allows for the continuation of internal work on the house for 90 days after installation 
• UNI has passed a water head test at 150mm at 48 hours! vs normal building wraps which are tested to a 20mm head of water at 24 hours