• Armstart Foundation Block 7.3N 300mm x 275mm x 140mm (Pack:63) (21.5 Block/M2)

Armstart Foundation Block 7.3N 300mm x 275mm x 140mm (Pack:63) (23.4 Block/M2 - Laid 300mm Wide )

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Product Code: 4003BLO165

21.5 Blocks Per m²

3.23 Blocks Per Linear m²

£2.15 Eachex. VAT£2.58 Eachinc. VAT

Widely used by major housebuilders, Armstart offers an efficient, simple and cost-effective method of block construction below damp proofing course (DPC) saving on labour and mortar.


  • Solid foundation walls from 250mm-350mm thick to suit cavity widths of 75mm-150mm.
  • Solid foundation walls below damp-proof course (DPC).
  • Suitable for soil conditions up to DS-3 as defined in BRE Special Digest 1.
  • A range of strengths available to suit both low and high-rise buildings.
  • Each block offers 2 alternative widths.


  • Below 20kg in weight to comply with HSE and CDM guidelines on repetitive manual handling safety.
  • A simple and safer alternative to cavity foundation wall; no wall ties required, cavity filling or danger of collapsed cavities, faster build rates, less mortar and repetitive manual handling required.
  • Brand: Thomas Armstrong
  • Type: Foundation Block
  • Width (mm): 140
  • Colour: Grey
  • Fire Rating: A1
  • Dimensional Tolerance: D1
  • Dry Density: 1450 - 1550Kg/m³
  • Compressive Strengths: 7.3N/mm²
  • Manufacturing Category: Category II
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