FAQs

Below are a list of some of the more Frequently Asked Questions relating to our Brick products, together with our responses, supported by the more detailed information contained in our Brick Technical Bulletins.

What is a Concrete Brick?

A Concrete Brick is a masonry unit produced by compacting a semi-dry concrete mix under high pressure using a combination of selected aggregates, cement and various admixtures along with synthetic pigments to produce a brick with low water absorption and minimal efflorescence. The resultant product is a high density unit with proven durability and frost resistance. This manufacturing process is easily and accurately repeated ensuring each unit has the same properties and appearance. 

How does a Concrete Brick differ from a Clay Brick?

In terms of performance there is virtually no difference. You are able to use a Concrete Brick for the same purposes and same areas as a clay brick, although due to the high standard strength of our Concrete Facing Bricks (22N/mm2) they can be used below DPC unlike some clay facing bricks. Also due to the manufacturing methods employed, Concrete Bricks are dimensionally precise and colour matching between batches is not generally an issue.

What are the main benefits/advantages of a Concrete Brick?

  • Concrete Bricks will gain strength with age.
  • Concrete Bricks are dimensionally accurate.
  • Concrete Facing Bricks are through coloured.
  • Production flexibility provides for a low lead time from order to delivery.
  • The superior strength and performance of a Concrete Brick means that Facing Bricks to 30N/mm2 strength are suitable for use in free standing and earth retaining boundary walls, in foundations and below DCP

How are Concrete Bricks environmentally friendly?

 

  • Concrete Bricks are an inherent Co2 absorber
  • Concrete Bricks are 100% recyclable and are suitable for use as crushed aggregates
  • The aggregates used utilise materials that in some instances are classed as a waste product of quarrying
  • Most aggregates used are from sources local to our plants and our delivery points are typically within 100miles therefore reducing our impact and associated carbon footprint
  • Edenhall Bricks are manufactured in the UK and have no adverse environmental impacts associated with imported products
  • The high energy firing of kilns in clay production processes is not required for the curing of our Concrete Brick. We simply use the natural exothermic reaction of the cement with no additional energy input. This means no additional natural resources are consumed and emissions are reduced.
  • Concrete Brick reaches the standard required for level 4 of the Code for Sustainable Homes, with a BRE A+ rating for brickwork and the Responsible Sourcing of Materials.

How are you able to offer such a range of colours and aesthetically attractive Concrete Brick finishes?

Due to our flexible and controlled manufacturing process we are able to process a vast range of vibrant and exciting colours encompassing the whole colour spectrum as well as being able to match colours and create new bespoke varieties. We are also able to offer a number of different finishes making our Concrete Facing Bricks suitable for any environment. Edenhall are at the forefront of technology in the development of new colours and textures resulting in a constantly evolving range on offer.

How do you achieve the permanence and consistency of colour in the Facing Bricks?

Historically colour integrity may have been an issue but this has not been the case for over 25 years now, Edenhall were, and continue to be, at the forefront of research and development into the performance of Concrete masonry through constant improvements particularly in the use of quality raw materials and stringent production process techniques and controls. Concrete Bricks are now produced using synthetic Iron Oxide pigments which, when combined with additives and surface treatments, have significantly reduced any problems and allow Edenhall to guarantee the colourfastness of our Facing Brick for a lifetime, and allow for weathering as any other masonry product. Ref BTB 7: Efflorescence & Colour Integrity

Do I have to use any special techniques or make any allowances when building with a Concrete Brick?

No. Building with Concrete Bricks should pose no more problems than using any other product. If anything the accuracy and consistency in the dimensions of a Concrete Brick can help with the laying out and maintenance of brick courses, with 10-15 courses being able to be laid per day. (Ref BTB 1: Good Site Practice)

Do Concrete Bricks Float?

As previously mentioned building with Concrete Bricks should not differ from using any other building product. However, it is important that the correct grade of mortar is used and its consistency is adjusted to allow for the density and relatively low suction rate of the Bricks. If this is done then as Concrete bricks are solid this can lead to savings of up to 15% on mortar use.

How is movement accommodated in the structure?

As with all other building materials Concrete Bricks can move when subjected to thermal, moisture or structural effects. In practical terms the shape and height : length ratio of the masonry panels is the major factor in accommodating movement. From experience we find that movement control measures in the range of 7.5 – 9m in length will be adequate. (Ref BTB 5: Movement Control)

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