Viblock 10 Series Architectural Veneer Cladding Revised April 2016

Viblock 10 Series Architectural Veneer Cladding – Revised April 2016. Select View Comments in the tool bar to view Guidance notes.

1. GENERAL

DOCUMENTS

1.1 DOCUMENTS REFERRED TO Documents referred to in this section are:

AS/NZS 1170 Structural design actions Part 1: Permanent, imposed and other actions Part 2: Wind actions Part 5: Earthquake actions – New Zealand AS/NZS 2699 Built-in components for masonry 2699.1: Wall ties 2699.3: Lintels and shelf angles NZS 3604 Timber framed buildings NZS 4203 General structural design and design loadings for buildings NZS 4210 Masonry construction: materials and workmanship AS/NZS 4858 Waterproof membranes CCANZ CP 01 Code of practice for weathertight concrete NZBC E2/AS1 External Moisture Documents listed above and cited in the clauses that follow are part of this specification. However, this specification takes precedence in the event of it being at variance with the cited document.

1.2 MANUFACTURER’S DOCUMENTS Viblock Ltd documents relating to work in this section are:

Viblock Block Chart Viblock Architectural Masonry information

Further information available from Viblock Ltd by phone 03 343 0394, and by fax 03 343 0393 or at www.viblock.co.nz

REQUIREMENTS

1.3 QUALIFICATIONS Masons to be, or supervised by, a Licensed Building Practitioner (LBP), familiar with the Viblock materials and deemed to comply with the competency requirements of NZS 4210.

1.4 CONSTRUCTION CONTROL AND CERTIFICATION, BLOCKWORK Carry out all masonry work under the supervision of a LBP deemed to comply with the competency requirements of NZS 4210.

Construction observation of specifically designed masonry veneers to be carried out by a design engineer or a nominated representative, who may be a LBP who complies with the competency requirements of NZS 4210.

The LBP to provide documentation to the builder confirming that the blockwork and inspections have been carried out in accordance with the design, any relevant Viblock specifications, and any relevant New Zealand Standards. 1.5 CERTIFICATION, SEALERS FOR ARCHITECTURAL MASONRY The sealer applicator to provide documentation to the builder confirming that the sealer application has been carried out in accordance with the design and the manufacturer’s specifications. A warrantee must be provided.

1.6 CERTIFICATION, PLASTERING The plaster applicator to provide documentation to the builder confirming that the plaster application has been carried out in accordance with the design and the manufacturer’s specifications. A warrantee must be provided.

1.7 QUALITY Keep accurate records relating to strength and quality of materials used in the construction, including photographs of as-built details. Provide information to the Building Consent Authority inspector on request or as required. Minor cracks, chips and blemishes may occur as a result of the manufacturing and/or delivery process, and is purely aesthetic only and not a defect. Once the product is laid it is deemed accepted.

PERFORMANCE TESTS

1.8 TESTS FOR BUILDINGS REQUIRING SPECIFIC ENGINEERING DESIGN Carry out all required tests to NZS 4210. - Compressive strength of mortar - Masonry to mortar bond

1.9 TESTING PROCEDURES Testing to be carried out by an independent laboratory to NZS 4210.

1.10 COMPRESSIVE STRENGTH OF MORTAR, BAGGED MORTAR Provide copies of the manufacturer’s latest mortar test result information. GUIDANCE NOTE Bagged mortars are recommended as they are tested regularly and therefore on-site testing may not be required.

1.11 MASONRY TO MORTAR BOND TEST If requested, carry out tests to NZS 4210: appendix 2B, Masonry to mortar bond strength test.

1.12 RECORDS OF TESTS Records of tests and their results to be kept on site.

1.13 TESTS FOR BUILDINGS NOT REQUIRING SPECIFIC ENGINEERING DESIGN NZS 4210 does not require any testing, but has record keeping requirements.

1.14 FIXINGS, WIND Design and use the fixings appropriate for the wind zone (R) and topographical classification (T) of this site and building height; as required by NZS 3604 and the wind loads on various wall areas as given by NZS 4203 or AS/NZS 1170.

1.15 FIXINGS, EARTHQUAKE Use fixings and methods capable of sustaining the loads appropriate to the area as set out in NZS 3604 and as required by NZS 4203 or NZS 1170.

2. PRODUCTS

MATERIALS

2.0 WATERPROOF MEMBRANE TO REBATES StoFlexyl waterproof membrane, with mesh coat as required (or similar) to the manufacturer’s specifications. 2.1 VIBLOCK ARCHITECTURAL MASONRY Viblock 10 Series Architectural Masonry units. Refer to 4. SELECTIONS.

2.2 ARCHITECTURAL MASONRY COLOUR Colour: Fire Ash, Kohl and Natural. Refer to 4. SELECTIONS.

2.3 ARCHITECTURAL MASONRY FINISH Finish: Honed or Fair Face. Refer to 4. SELECTIONS.

2.4 MORTAR Cemix bagged mortar. Colour: Fire Ash, Kohl or Natural. Refer to 4. SELECTIONS.

2.5 WATER FOR MORTAR Clean, fresh and free from excess alkali, salt, silt and organic materials.

2.6 IN-JOINT REINFORCEMENT Galvanised or stainless in-joint-reinforcing as specified. Required every 2nd course for stack bond. Refer to 4. SELECTIONS.

2.7 METAL TIES Flat strap type, manufactured to AS/NZS 2699.1 and NZS 4210: 2.1.9 Wall ties. Refer to 4. SELECTIONS.

2.8 DOVETAIL METAL TIES Folded metal slot type, manufactured to AS/NZS 2699.1 and NZS 4210: 2.1.9 Wall ties.

2.9 LINTELS To AS/NZS 2699.3. Galvanised or stainless steel angle lintels as specified.

2.10 ARCHITECTURAL MASONRY: PROGRESSIVE AND FINAL CLEANER Low pressure spray, and/or stiff nylon scrubbing brush, and/or suitable masonry cleaner as required. In some instances, a professional masonry cleaning contractor may be required to clean the product to desired standard.

2.11 ARCHITECTURAL MASONRY CLEAR COATING Exterior coatings must comply with CCANZ CP O1; 2011 Sto S-Protect system apply 2 flood-coats WS405 leave 5 days and apply 3 coats StoProtec by approved applicator. Note refer to StoProtect Veneer Specifications. Sto phone numbers 03 338 3570, 04 801 7794, 09 522 1058 or visit www.sto.co.nz

Refer to 4. SELECTIONS.

2.12 ARCHITECTURAL MASONRY CONTROL JOINT SEALANT Selected suitable flexible sealant compatible with clear sealers used.

2.13 WEATHERPROOFING AROUND OPENINGS Refer to architectural details.

2.14 EXTERIOR MASONRY PLASTERING / PAINTING StoArmat Miral Plaster System for residential dwelling or StoMiral Plaster System for garden walls. BRANZ Appraisal No 515

2.15 PLASTERED MASONRY CONTROL JOINT Sto PVC plaster control joint system to manufacturer’s specifications. 3. EXECUTION

CONDITIONS

3.1 GENERAL To NZS 4210

3.2 HEIGHT LIMITATIONS Single storey construction, maximum height 3 metres and 5 metres for the apex of gable ends. If higher, specific design is required.

3.3 STORE MASONRY Remove shrink wrap and store masonry units clear of the ground, under cover and well ventilated where they cannot be damaged or soiled and remain dry until placed in the work.

3.4 CHECK CONCRETE BASE Check that the base concrete on which masonry is being built is true to line and level, clean and free of any dirt or loose material, to ensure that work can be taken up true and plumb with 10 mm thick bed and perpendicular joints. Any variance in the foundation that would cause the base mortar joint to be less than 7 mm or more than 15 mm thick, should be corrected before blocklaying.

3.5 CUTTING Always use a masonry saw to provide clean, accurate cuts.

3.6 BRACING Provide temporary lateral bracing where necessary to ensure stability and until final supporting construction is in place.

APPLICATION

3.7 GENERAL Install in accordance with this specification, and NZS 4210.

3.8 WATERPROOFED REBATES Coat rebates under walls with 2 coats of Sto Flexyl to Sto specifications.

3.9 TOLERANCES Construct within the tolerances set out in NZS 4210: 2.6.5 Tolerances and 2.7 Laying the units, unless specified otherwise on the drawings or in this specification. Lay blocks with jointing of consistent 10 mm nominal thickness throughout.

3.10 CAVITY WIDTH To NZS 4210: 2.9 Veneer and cavity wall construction.

3.11 OVERHANG Install blocks with overhang of supporting foundation from nil to 20 mm.

3.12 VENTILATE Ventilate top of cavities with vermin proof concrete vents at 800 mm centres. Do not ventilate into roof space.

3.13 WEEPHOLES To NZS 4210. Provide where exposed to the weather above foundations and slabs at the bottom of all veneers, a 75 mm x 10 mm weep hole at 800 mm centres.

3.14 HOLES AND CUT MASONRY Provide all necessary holes, pockets and chases. Cut blocks when non-standard shapes are required.

3.15 BONDING PATTERN – ARCHITECTURAL MASONRY Architectural Masonry: Stretcher bond or stack bond. Refer to 4. SELECTIONS. 3.16 BONDING PATTERN – PLASTERED MASONRY Plastered masonry: Stretcher bond. Refer to 4. SELECTIONS

3.17 ARCHITECTURAL MASONRY WORKMANSHIP Construct and complete walls to an acceptable Architectural Masonry finish. Different block types will always vary in finish and colour as they are never made from the same batch and have different densities. Minor chipping and variations to surface appearance are not recognised as block defects, and should be expected. Completed exposed walls should be viewed from a distance of not less than 6.1 metres under diffused light when assessing. This complies with the requirements of ASTM C90. 3.18 BAGGED MORTAR MIXING Use Cemix bagged Mortar only. Site mixed mortar is not permitted. Mix thoroughly with water for at least 5 minutes.

3.19 MORTAR INSTALLATION Apply Mortar to Architectural Masonry to achieve a 10 mm nominal thickness on both horizontal and vertical joints. Take extra care to ensure that all mortar joints are completely filled to ensure weathertightness.

Clean any mortar smears or droppings off the masonry before they dry. Rake any control joints to a minimum 15 mm depth or leave control joint free of mortar.

3.20 MORTAR FINISHING Once the mortar has stiffened enough to resist thumb pressure, compact all joints by tooling the mortar, to close up gaps, reduce shrinkage and produce a sharp and uniform appearance. Rake joints if specified. Blocks should not be moved once the mortar has stiffened. Joints around opening joints to be compacted and flush finished. Check for any voids in the mortar and patch with Mortar.

3.21 ARCHITECTURAL MASONRY PROGRESSIVE CLEANING Clean mortar droppings/smears off walls before they dry. Clean efflorescence and/or stains off walls regularly until roof and sealer system is in place. A suitable masonry cleaner and stiff nylon brush may be required. In some instances, a professional masonry cleaning contractor may need to be employed to get the blocks looking pristine.

3.22 BUILD IN WALL TIES, TIMBER Build in wall ties for timber support walls to NZS 3604 at 600 mm horizontal and 400 mm vertical maximum. Fix to timber stud with screws or other non impact fasteners.

3.23 BUILD IN WALL TIES, CONCRETE AND MASONRY Build in wall ties for reinforced concrete or masonry support walls at 600 mm horizontal and 400 mm vertical maximum, or equivalent area. Set into concrete with dovetail ties slotted in as work proceeds.

3.24 WALL TIES GENERALLY Wall ties installed to NZS 3604, clauses 11.7.5.2 and 11.7.5.3 Wall ties. Wall ties at unsupported edges, all openings and at bottom of veneer walls to NZS 4210, clause 2.9 Veneer and cavity wall construction.

3.25 IN-JOINT REINFORCEMENT Install in-joint reinforcing (Bricklock) as specified. Required every 2nd course for stack bond. IJR is galvanized or stainless steel in the more aggressive sea spray durability zones. IJR to be discontinuous at control joints. Joints in IJR should be minimised, but if required should be suitably tied. IJR should be covered from the exterior by at least 10- 15 mm of mortar.

3.26 CONTROL JOINTS Build control joints as specified in NZBC E2/AS1 External Moisture. Page 115 section 9.2.8 3.27 INSTALL SILLS Build sills as specified. Typically, a 10-Series Architectural Masonry is cut to size and laid on its side to a suitable slope.

3.28 BUILT IN ELEMENTS Mortar in place elements such as sills, copings and lintels as the work proceeds.

3.29 BUILD IN LINTELS Build in angle lintels as work proceeds, with 200 mm bearing each end for spans > 2 metres, and 100 mm for spans < 2 metres.

3.30 CLEAN OUT Clean out by removing mortar droppings from ties and from the cavity. Remove any other loose material from the cavity

3.31 ARCHITECTURAL MASONRY FINAL CLEANING Clean efflorescence and/or dirt off walls prior to sealing. A suitable masonry cleaner and stiff nylon brush may be required. In some instances, a professional masonry cleaning contractor may be required to clean the product to desired standard.

3.32 ARCHITECTURAL MASONRY SEALING Exterior coatings must comply with CCANZ CP O1; 2011 Sto S-Protect system apply 2 flood-coats WS405 leave 5 days to catalyze and apply 3 coats StoProtec by approved applicator. Note refer to StoProtect Veneer Specification.

Refer to 4. SELECTIONS.

Ensure that all mortar joints are intact and completely filled prior to sealing. Test a small area of sealer prior to full sealer application. Seal after roof installation and after cleaning; no water should be getting in the top of the walls. Seal around windows prior to windows being installed. Ensure that the insides of each control joint are well sealed and ready to accept flexible sealant.

3.33 ARCHITECTURAL MASONRY CONTROL JOINT SEALING Ensure that clear sealer has been applied into control joint, particularly the sides of the joints. Fill joint with suitable flexible sealant to compliment mortar/blocks. For control joints without a raked mortar detail, use a backing rod prior to sealant application. Ensure sealant is compatible with clear sealer.

3.34 WEATHERPROOFING, ALUMINIUM WINDOW/DOOR OPENINGS Install joinery to architectural details. 3.35 WEATHERPROOFING, FULL LENGTH ALUMINIUM WINDOW OPENINGS AND DOOR BASES Install joinery to architectural details.

3.36 EXTERIOR PLASTERING / PAINTING StoArmat Miral Plaster System for residential dwelling or StoMiral Plaster System for garden walls.

3.37 PLASTERED MASONRY CONTROL JOINTS Sto PVC control joint system to manufacturer’s specifications.

COMPLETION

3.38 REMOVE Remove debris, unused materials and elements from the site. 4. SELECTIONS

Viblock Architectural Masonry

4.1 WATERTIGHT MEMBRANE Brand: Sto Type: StoFlexyl meshed waterproofing Tested to AS/NZS 4958

4.2 MASONRY UNITS Brand: Viblock Architectural Masonry Block Series: 10-Series Block type: As required Colour: Fire Ash, Kohl or Natural Finish: Specify here

4.3 MORTAR Brand: Cemix Mortar Colour: Fire Ash, Kohl or Natural

4.4 IN JOINT REINFORCING Option 1 Brand/type: Straightened Galvanised Wire Wire: 2.5mm Protection Galvanised or Stainless Bend: Create 40-50mm right angle bend on each end during installation

Option 2 Brand/type: Bricklock Wire: 4mm welded Protection Galvanised or Stainless Width: 39mm

4.5 METAL TIES Protection: Galvanised (Stainless for sea spray zones) Size: 105 mm

4.6 STEEL ANGLE LINTELS Protection Galvanised Size: As specified

4.7 CLEAR SEALER TO CCANZ CP 01: 2011 Exterior Manufacturer: Sto Sealer: 2 x flood-coats WS405 by applicator Finish: 3 x coats StoProtect by approved applicator Note refer to StoProtect Veneer Specification Sto phone 03 338 3570, 04 801 7794, 09 522 1058

4.8 CONTROL JOINT SEALANT Sealant: ~ GUIDANCE NOTE Select a suitable flexible sealant compatible with clear sealer for Architectural Masonry finishes. Colour to compliment masonry and mortar.

4.9 PLASTER / PAINT Brand: Sto Plaster: StoArmat Miral Plaster System Finish Stolit K coloured render Paint: StoColor Maxicryl