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NBS Source


AG Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Double-sided block with a weathered finish and vertical face.

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  • Suitable for both straight and fixed radius curved walls.
  • Available up to 1 m for gravity walls and above 1 m for engineered walls.
  • Suitable for free standing walls to a height of 0.9 m- not suitable for retaining walls.


Double-sided block with a natural weathered finish and a completely vertical face to create a free-standing, self-supporting, mortarless wall.

Features and benefits:

  • Can be finished as a ‘stop end’ wall with stop end blocks and factory split half blocks provided.
  • The double-sided finish of each block means that the walling can be built anywhere without a concrete foundation.
  • Natural appearance of cut stone.
  • Built with no mortar or concrete, this dry-build locking system allows fast-track construction in all weathers.
  • Each block features a locator that acts as a guide to ensure accurate vertical alignment and a perfect running bond.
  • The ShortCut cap block is shaped asymmetrically (tapered), minimizing the need for cuts.

Minimum radius:

  • Outside curve (to back of block on bottom course): 2.56 m.
  • Inside curve (to back of block on bottom course): 2.04 m.

Consult manufacturer's technical literature for further details.

Set back/ face angle:

  • Double-sided Block: 0°.
  • Standard Block: 4°.


Anchor Vertica can be installed mechanically using a special clamp in conjunction with an excavation digger.



General information


Stone cut





260 mm


220 mm


150 mm


Pr_20_93_71_15 Concrete interlocking blocksPrimary


D41/310 Drystack interlocking masonry

Product range

Retaining Walls

Specification data - Concrete interlocking blocks


Manufactured to BS EN 771-3:2011+A1:2015.


Face coverage:

30 units/m².

Weight (approximate):

15 kg.

220 x 150 x 260 mm.

 (length is 176 mm on short side).



Exposed faces

Stone cut.


Consult with AG for availability of colours and to obtain samples.


Special shapes

Not required.

Kamden Corner Block.

Kamden Half Block.

Kamden ShortCut™ Cap.

Kamden Stop End Block.

Compressive strength - 28 days

24 N/mm².

Environmental information

Country of material origin

United Kingdom

Embodied carbon

  • Carbon footprint: AG have a state-of-the-art wash­ing plant which enables them to produce walling from 100% recycled waste aggregate.
  • BREEAM rating: A, in accordance with the Green Guide to specification.



  • Energy use: 100% renewable energy.
  • Water used: 100% rainwater harvesting.
  • Recyclability: 100% of this product can be recycled.
  • Manufacturing location: Produced in the UK using responsibly sourced materials.
  • Recycled aggregate content: 65%.
  • Waste wood and plastic: 100% recycled.


Third party certifications

  • BREEAM: A+ rating

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