Concrete Blocks


Roadstone manufacture the most extensive range of concrete blocks in Ireland from the highest quality aggregates produced at our own quarries.  Standard concrete blocks have been the proven mainstay of modern construction techniques in Ireland for decades.

  • Available in High compressive strength
  • Class A1 – Fire resistance
  • Excellent sound insulation
  • Low thermal conductivity and high thermal capacity
  • Long term durability
  • Sustainable production process
  • Extensive range of solid and hollow blocks
  • Standard sizes – metric 450mm and modular 400mm ranges
  • Wide choice of accessory products
  • Produced nationwide
  • Product technical advice available
  • Cost effective
Block Range
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Technical Specification

Standard Blocks are available in both metric and modular sizes and are suitable for plastering.

Standard Concrete Blocks
  • I.S. EN ISO 9001:2000 quality management system
  • I.S. EN 771-3:2011 Specification for Masonry Units – Part 3: Aggregate Concrete Masonry Units using an NSAI, System 2+ Certificate of factory production control
  • Roadstone products also meet the statutory requirements of the relevant sections of The Irish Building Regulations 2014
Thickness Options
  • 450mm Range 100mm / 140mm / 215mm
  • 400mm Range 90mm / 190mm
Standard Specials
  • Quoins, Cavity, Closer, Lintels, Bond Beams
  • The full Forticrete range of shapes and sizes can be made to order
Compressive Strength
  • Available to I.S. EN772-1 fm dry
  • Group 1 (solid) 7.5N/mm² 13N/mm² and 18N/mm²
  • Group 2 (cavity) 4.5N/mm² 5N/mm² and 13N/mm²
Fire Resistance
  • Euro code 6 – I.S. EN 1996 Design of Masonry Structures – Part 1-2: General Rules – Structural Fire Design, defines the methods and calculations to determine the fire resistance of concrete block walls. Table N.B3.1 to table N.B3.6 of annex A, Roadstone Blocks have a Class A1 Fire rating
Thermal Properties
  • I.S. EN 1745 Masonry and masonry products-Methods for determining design thermal values . table A3
  • Typical Thermal Resistance “R” value of 100mm solid block = 0.084 (m²K/W)
  • Typical Thermal Resistance “R” value of 215mm cavity block = 0.210 (m²K/W)




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