Specifcations
The Block Shop NZ Limited concrete block veneer meets the requirements of AS/NZS4455 as a masonry brick veneer and complies with and exceeds the 15 year durability requirements as stated in the New Zealand Building Code B2.
The New Zealand Building Code (NZBC) clause applicable to the construction of brick veneers is E2.E2/AS3 references construction according to the Cement and Concrete Association New Zealand’s document CCANZ CP 01 as a means of compliance with the NZBC. Some interpretation of the details is needed as the document is written for concrete wall construction, however the details for the veneer do not change between the concrete wall and timber framed construction. When timber frame walls to NZS 3604 are used the veneer details and specifications still apply.
| 70 series Sizes | Measurements | Pallet Load |
| Standard Brick | 230 x 90 x 70 mm(approximately 41.6 per m²) 2.2 kg brick weight | 451 |
| Standard Brick and a Half | 230 x 115 x 70 mm | 387 |
| Standard Brick and a Half | 230 x 115 x 70 mm (approximately 34 per m²) 3.2kg brick weight | |
| Standard Double Brick | 300 x 150 x70 mm (approximately 22 per m2) 4.1 kg brick weight | |
| Compressive Strength | In excess of 10 MPa | |
| Compatibility | ||
| The Block Shop NZ Limited concrete veneer bricks are made from standard concrete masonry materials and so are compatible with any typical NZ construction systems as specified in NZ 3604, |
| Construction Information | ||
| The product is designed to fit in with the requirements of NZS 3604, NZS 4210 and CCANZ CP 01 for the construction of brick veneer claddings. | ||
| Maximum Height: | 4.0 m measured as per description in NZS 3604 CL 1.1.2 (o) (iii). | |
| 5.5 m in a gable end as per the same clause. | ||
| 5.5 m for a pier not exceeding 1.0 m in width and not supporting a steel lintel. | ||
| Mortar: | Shall be as per NZS 4210 Cl 2.2 with minimum strength of 12.5 MPa. Pre-mixed bagged mortar is also acceptable provided it meets the same requirements. | |
| Brick Ties: | Screw-fixed galvanised ties to be used which comply with AS/NZS 2699: Part 1 with a minimum 50% bedding in wet mortar. Stainless steel wall ties to be used in sea spray zones. |
| Placement of Brick Ties in Mortar Courses(approximately 34 per m²) |
| Brick Height | Studs at 600 mm | Studs at 400 mm |
| 76 mm | Fourth course | Fifth course |
| 115 mm | Third course | Fourth course |
| 150 mm | Second course | Second course |
Workmanship:
The construction of masonry works deemed to comply with this standard (NZS 4210: 2001 1.5) shall be carried out by competent, experienced tradesmen and/or a Licensed Building Practitioner. The tradesmen should be supervised by a LBP. The Block Shop NZ recommends that this product is installed by a LBP, qualified in brick and blocklaying in accordance with the Licensed Building Practitioners Board.
Finishes:
Colours:
Black, white, cream, brown, natural. NB Colour and texture may vary between brick types and batches. To ensure a uniform finish The Block Shop recommends that the product is laid from the same batch. Try to use the bricks from three pallets wherever this is feasible to reduce any possible visual colour changes.
Efflorescence:
We have taken all possible steps to prevent this from occurring in our products, however this is a natural occurrence in concrete products. Bricks are to be kept covered and dry during the construction process to reduce the chance of it occurring.
Sealing:
This will enhance the appearance, life and durability of the bricks but is not mandatory.
Completed Veneer:
In common with masonry products, some chipping may occur during manufacture, delivery and handling on site. The Block Shop NZ Limited accepts no responsibility or liability for any substandard workmanship or incorrect installation once this product has been laid. Once the product has been laid it is deemed that the quality has been accepted by the customer. The Block Shop NZ accepts no responsibility or liability for any costs incurred by any party for the installation or taking down of this product.
Frogs:
The Block Shop NZ concrete brick has a frog (recess). This frog is to be laid face-down.
Control Joints:
Control joints are required in concrete masonry veneers to manage shrinkage cracking. The Block Shop will not accept responsibility for any random cracking in either mortar or brick that may result from either drying or ground settlement. We recommend control joints be no more than 5-6 m apart for long walls with no windows. If there are no windows within 6 m of a corner then a control joint should be located within 3 m of that corner. Control joints should also be placed at every window under one corner for openings of less than 1.8 m and both corners for longer windows.
Construction Details
1 Remove all mortar prior to initial set along the saw tooth line where control joints are required.
2 Place a 12 mm or 15 mm diameter PEF (Polythene foam) rod continuously into the joint 30 mm back from brick face to form a backing strip.
3 Leave the joint unmortared as long as possible to allow shrinkage to occur.
4 Use 20 mm of matching mortar to complete the joint.
5 With the correct number of control joints, cracking if visible along mortar/brick line will be minimised.