Important Information

Masonry Block Work

Fair Face Jobs (Exposed Block work)

Check the block layer is a registered Licenced Building Practitioner (LBP). Ensure your block layer is aware you are after a 'Fair Face finish' and that the project is not going to be painted or plastered over.

Customer Expectations for appearance and quality should be checked prior to commencement of the job. It is a good idea to build a sample panel of the blocks prior to starting the project for the client to inspect. Make them aware that they may get chipping, joint size variations to compensate the size tolerations of blocks and that mortar colours may bleed into the block. I.e. Dark mortar against a light coloured block. Stack Bonded block work will also enhance any chipping or variations.

Different block profiles will vary in texture and colour as they are not produced in the same batch. Limit the amount of block types used in a job to achieve a better finish. This may require the block layer having to do extra cutting onsite. Allow for this in your pricing.

Be selective when laying the blocks - put stained, damaged or chipped blocks to one side and do not lay them in highly visible areas. I.e. near the front door. Chips of varying sizes may be evident on the edges and corners of the blocks. Complete product breakage may also occur during cartage, especially on long distance haulage or during unloading. These are an unavoidable part of distributing and manufacturing any masonry product. Minor cracks and chips can occur but are not recognised as block defects.

The use of a "raked" joints will emphasise chipping to the edges of the blocks. Concave or flush joints will tend to hide these minor chips. Please note that "raked" joints are also not recommended for external walls as the joint may retain water.

Any product which has been rejected by the customer or their layer due to chips or breakage will be the customer's responsibility. A wastage percentage should be applied to every project and typically an extra 10% should be ordered to compensate for this.

Chipping should be limited to 5% of a consignment containing less than 12.5mm in any dimension and any cracking to be less than 0.5mm in width and less than 25% of the nominal height of the unit.

Chips and imperfections should not be evident when viewed from a distance of not less than 6.1m of the constructed wall, under diffused light. As per ASTMC90, which has been adopted as the industry standard for viewing brick and blockwork.

Block work should be kept dry during the construction process and prior to sealing.

When placing the order, you must:

  • Inform “Bowers Brothers” that this is a “Fair Face Job”.
  • Place the order for the “entire” job, not just load at a time.
  • Allow for extra time for the order to be selected.

This will allow us to be able to select different block types from batches that have the best possible colour match.  However, this is in no way a guarantee.

On Site Honing

Please make note of all aspects covered in Fair Face block work as these also apply to honed block work.

Honed masonry is from the standard range of 10,15,20 and 25 series hollow blocks. The block surfaces are ground back, removing 2mm – 3mm off the block face giving a smooth finish that reveals the aggregate.

The results from the manufacturing process and delivery and may only become apparent after the honing process.

Hairline cracks, chips or other imperfections may be exposed after the honing process that were not evident during the construction of the wall. This is strictly an aesthetic issue which needs to be discussed with the client. Ways to rectify these should have been discussed prior to commencement of the honing and should be part of the honing contractors price. You should also allow for the block layer, having to cut out and replace the face of a block in the event of the honing process exposing something that the honer cannot rectify. These costs should also be allowed for.

Only contractors who specialise in Honing on Site should be used for this process.

As masonry blocks are manufactured using natural products, some variation in the shade and aggregate density should be expected.

Shot Blasted Blocks

Shot Blasted masonry is from the standard range of 10,15,20 and 25 series hollow blocks. The block surfaces are shot blasted, removing 2mm – 3mm off the block face giving a rough finish that reveals the aggregate.

Shot Blasting gives a similar appearance to Honed Blocks from a distance however it helps disguise chipping and joint size variations due to the rough texture.

Please make note of all aspects covered in Fair Face and Honed block work as these may also apply to Shot Blasted block work.

Shot Blasting is a secondary process that is carried out on a "Made to Order" basis and we do not except returns on Made to Order product.

Paving

As masonry paving is manufactured using natural products, some variation in the shade/colour, texture and size tolerations should be expected.

Paving for each job should come out of the same batch and you should blend off multiple pallets.

A “Batch” is deemed to be:

  • From which plant it is manufactured &
  • The date of manufacture.  (this may be over consecutive days due to manufacturing limitations).

It is advised that you check the batch details on all pallets prior to commencing installation in case there has been a loading error from the yard or your supplier.  It is easier to remedy any issues before the work has commenced.

It is also advised that you keep a copy of the batch details in case you run short of product.

Product laid is deemed to be product accepted.

Brick Veneers

As masonry brick veneers are manufactured using natural products, some variation in the shade/colour, texture and size tolerations should be expected.

Brick veneers for each job should come out of the same batch and you should blend off multiple pallets.

A “Batch” is deemed to be:

  • From which plant it is manufactured &
  • The date of manufacture. (this may be over consecutive days due to manufacturing limitations).

It is advised that you check the batch details on all pallets prior to commencing installation in case there has been a loading error from the yard or your supplier.  It is easier to remedy any issues before the work has commenced.

It is also advised that you keep a copy of the batch details in case you run short of product.

Be selective when laying the brick veneers - put damaged or chipped bricks to one side and do not lay them in highly visible areas.  I.e. near the front door.

Chips of varying sizes may be evident on the edges and corners of the bricks. Complete product breakage may also occur during cartage, especially on long distance haulage or during unloading. These are an unavoidable part of distributing and manufacturing any masonry product. Minor cracks and chips can occur but are not recognised as brick defects.

Chips and imperfections should not be evident when viewed from a distance of not less than 6.1m of the constructed wall, under diffused light.

We strongly advise that all parties involved in the construction process (builder, brick layer & client) are made aware of and have read the Brick & Block Layers Federation of New Zealand, brick veneer best practice guide.

Product laid is deemed to be product accepted.

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