WANZ Window Installation System

1 wanz Window Installation System An Alternative Solution for the Installation of windows & Doors Window Installation System 1 July 2005 _____ Window association of New zealand Page 2 of 65 Contents Page References 3 Definitions 4 Objective 5 Scope 5 Cavity Cladding Systems 5 Direct Fix Cladding Systems 5 wanz Window Installation System 5 The Project Team 5 Cladding Junctions & Window Support 6 System Overview 6 Preparation of the Opening 6 Window Installation 6 Preparation of Opening 6 Cavity Construction 6 Direct Fix Claddings 7 Testing 8 Verification Method E2/VM1 8 AS/NZS 4284:1985 8 The Test Samples 9 Cavity Construction 10 Step 1 Preliminary Check of Sill Trimmer 11 Step 1a Building Wrap Preparation 12 Step 2 Flexible Sill Flashing 13 Step 3 Upper Corners 14 Step 4 Unit Support for Openings with Wall Framing 15 Step 4a Unit Support for Openings at Floor Level 16 Step 5 Position Unit in Opening 17 Step 6 Fix off Inside of Unit 18 Step 6a Fix off Inside of Unit 19 Step 7 Air Seal 20 Step 8 Cavity Closer 21 Step 9 Battens 22 Step 10 Head Flashing 23 Step 11 Cladding 24 Components 25 Brick Veneer 26 Brick Veneer Alternatives 27 Stucco Recessed Window 28 Stucco Flush Window 29 Bevel Back Weatherboards 30 Rusticated Weatherboards 31 Fibre Cement Weatherboards 32 Horizontal Profiled Metal 33 Fibre Cement Sheet 34 Plywood Sheet 35 EIFS Recessed Window 36 EIFS

2 Flush Window 37 Direct Fix 38 Step 1 Preliminary Check of Sill Trimmer 39 Step 1a Building Wrap Preparation 40 Step 2 Flexible Sill Flashing 41 Step 3 Upper Corners 42 Step 4 Sill Pan 43 Step 5 Unit Support for Openings with Wall Framing 44 Step 5a Unit Support for Openings at Floor Level 45 Step 6 Position Unit in Opening 46 Step 7 Fix off Inside of Unit 47 Step 7a Fix off Inside of Unit 48 Step 8 Air Seal 49 Step 9 Head Flashing 50 Step 10 Cladding 51 Bevel Back Weatherboards 52 Rusticated Weatherboards 53 Vertical Shiplap Weatherboards 54 Board & Batten 55 Fibre Cement Weatherboards 56 Vertical Profiled Metal 57 Fibre Cement Sheet 58 Plywood Sheet 59 EIFS Recessed Window 60 EIFS Flush Window 61 Concrete Block 62 Precast Concrete Panel 63 Appendix A 64 Summary of Test Reports 65 Window Installation System 1 July 2005 _____ Window association of New zealand Page 3 of 65 References Reference was made while compiling this document to the following: Standards New zealand AS/NZS 1734:1997 Aluminium and Aluminium Alloys NZS 3504:1979 Specification for Aluminium windows NZS 3604:1999 Timber Framed Buildings NZS 4211:1985 Specification for Performance of windows NZS 4203:1992 General Structural Design and Design Loadings for Buildings NZS 4223: Code of Practice for Glazing in Buildings Part 1:1985 Part 3:1999 Part 4: 2000 AS/NZS 4284:1995 Testing of Building Facades Building Industry Authority Approved Document for New zealand Building Code, External Moisture E2.

3 Verification Method E2/VM1 Acceptable Solution E2/AS1 The New zealand Building Code B1 Structural B2 Durability E2 External Moisture F2 Hazardous Building Materials Other Organisations NZ Metal Roof and Wall Cladding Code of Practice NZMRM September 2003 The Brick Book 1st Edition 2000 Window Installation System 1 July 2005 _____ Window association of New zealand Page 4 of 65 Definitions The following is an abbreviated list of words and terms of particular relevance to the wanz Window Installation System . Air seal: A continuous water resistant seal around the perimeter of the Window or door, fitted between the Window or door jambliners and the wall framing. Holds pressure in the trim cavity and enables pressure equalisation by preventing air flow to the interior of the building.

4 Typically an air seal is a low expansion foam or sealant, with an optional PEF rod. Building Wrap: A building paper, synthetic wrap or sheathing used as part of the wall cladding System to assist the control of moisture by ensuring moisture which occasionally penetrates the wall cladding is directed back to the exterior of the building. Cavity Batten: A vertical packing member used to create a drained cavity as part of a cladding System . Cavity Wall: A term used to describe a wall that incorporates a drained cavity. Cladding: The external weather resistant surface of the building; includes supporting components and surface treatment. Cladding System : The weatherproof enclosure of a building including building wraps, claddings, fixings, flashings, seals, joints, junctions and Window /door penetrations.

5 Direct Fixed: A term used to describe a wall cladding attached directly to the wall framing without the use of a drained cavity. Drained Cavity: A cavity space immediately behind the wall cladding that has the ability to ventilate and drain water that occasionally penetrates the cladding System . Flexible Flashing Tape: A flexible self adhesive waterproof tape used in conjunction with the building wrap to protect the wall framing along the sill, upper corners and intersections. Head Flashing: Fixed to the cavity battens at the head of the Window or door, it deflects or drains water to the outside of the cladding System . Pressure Equalisation: The term used to describe the equalising of pressures between the trim cavity and the exterior of the building.

6 When achieved air flow between the two spaces is eliminated. Sill Pan: A flashing used for direct fix claddings designed to collect and drain water that may penetrate through the Window or door unit. It extends from the inner most point of the aluminium frame, out and over the external face of the cladding. It runs the full width of the trim opening with upstands at both ends. Specific Design: A term to describe methods outside the scope of the wanz Window Installation System . Trim Cavity: The space between the Window or door frame perimeter and the wall framing. Unit Support: A term to describe the method used to provide a continuous support across the sill of a Window or door unit for either cavity construction or direct fixed claddings.

7 wanz Cavity Closer: A flashing device that closes the cavity above the Window or door unit thus directing water that occasionally penetrates the wall cladding into the cavity spaces adjacent to the Window . The wanz cavity closer directs the water to the back face of the cladding or wet side. Note, substitute cavity closers are not acceptable for use with the tested wanz WIS Alternative Solution. wanz Support Bar: The extruded aluminium support bar provides continuous support to the Window unit. The support bar has been independently tested for the loads imposed and includes built in drainage and ventilation as required by NZBC E2. Note, substitute support bars are not acceptable for use with the tested wanz WIS Alternative Solution.

8 wanz Support Angle: Used in conjunction with the sill pan for deeper claddings to transfer the weight of the Window unit back to the structure. Wind Zone: The categorisation of wind force experienced on a particular site or region as determined in NZS 3604: 1999. Window Installation System 1 July 2005 wanz Window Installation System An Introduction to the Step by Step Guides. Window association Of New zealand Page 5 of 65 Objective The primary objective, and the Mission Statement throughout the development process, was To provide a quick and easy Installation method, applicable to all residential Window installations, regardless of wind zone. It was agreed that whilst the System needed to address the issues of weathertightness in an innovative and robust manner, in order to gain industry-wide acceptance it could not depart too far from traditional Window Installation methods.

9 The secondary objective was to prepare and support the System in such a way that it would be readily accepted as an Alternative Solution to the details described in E2/AS1. Scope The wanz Window Installation System ( wanz WIS) covers the weathertightness of aluminium Window and door Installation into the external walls of the building envelope. The scope of this document is limited to the Installation of aluminium windows and doors into the external walls of buildings within the scope of Clause of NZS 3604:1999, and meets or exceeds the performance requirements for Low, Medium, High and Very High Wind Zones. wanz WIS applies to claddings installed either on to a cavity System , in accordance with E2/AS1, or directly fixed to timber framing. Installations that fall outside the scope of this document will require Specific Design by a suitably qualified person.

10 Specifically the claddings covered by wanz WIS are: Cavity Cladding Systems; a) Brick Veneer b) Stucco c) Bevel Back Weatherboards d) Rusticated Weatherboards e) Fibre Cement Weatherboards f) Horizontal Profiled Metal g) Fibre Cement Sheet h) Plywood Sheet i) EIFS Note: Window and door Installation into cavity cladding systems assumes that the Installation can make use of the building cavity. For situations where the Window or door is rebated back to the framing line, then these details will fall outside the scope of this document. Direct Fix Cladding Systems; a) Bevel Back Weatherboards b) Rusticated Weatherboards c) Vertical Shiplap Weatherboards d) Board and Batten e) Fibre Cement Weatherboard f) Vertical Profiled Metal g) Fibre Cement Sheet h) Plywood Sheet i) EIFS j) Concrete Block (untested) k) Precast Concrete Panel (untested) The materials used in the preparation of the trim opening and for use as Window Installation components shall be in accordance with the durability requirements of NZBC Clause B2, suitable for their end use and compatible with adjoining materials.