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We are Part of the Thomas Armstrong Group

THOMAS ARMSTRONG

(CONCRETE BLOCKS)

LTD

GALLERY

DISCLAIMER

The block and texture images are intended for indicative purposes only and actual textures and shades may vary between manufacturing locations. Please contact your regional sales office for further information and sample blocks. We advise the construction of sample panels on site as masonry appearance cannot be appreciated from individual blocks.

MEDIUM DENSITY AGGREGATE FOUNDATION BLOCKS

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.

Manufactured in a range of width / length combinations, these Medium Density Foundation Blocks are a faster, simpler and safer method when compared to constructing cavity foundation walls. No wall ties are required, no cavity filling and no danger of collapsed cavities. Resulting in faster build rates, less mortar and less repetitive manual handling. Weighing less than 20kg, these lightweight concrete blocks contain up to 90% recycled and reclaimed raw material.

Our Armstart Foundation blocks are manufactured to BS EN 771-3 and are ISO 9001 Quality Assured, ISO 14001 Environmentally Certified and hold BES 6001 ‘Excellent’.

APPLICATIONS

  • 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.

KEY ADVANTAGES

  • 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.

DOCUMENTS

  •  

    PROPERTY

    REFERENCE

    VALUES

    Face Sizes (L x H)

    Dimensional Tolerance

    Gross Dry Density

    Mean Compressive Strengths

    Manufacturing Category

    Design Thermal Conductivity

    Moisture Movement

    Fire Resistance

    Configuration

    Available Texture Finish

    BS EN 771-3

    BS EN 772-16

    BS EN 772-13

    BS EN 772-1

    BS EN 771-3

    BS EN 1745

    BS EN 772-14

    BS EN 13501-1

    BS EN 1996-1-1

     

    300mm x 250mm
    300mm x 275mm
    320mm x 280mm
    350mm x 215mm
    350mm x 250mm

    Category D1

    1450 - 1550 kg/m³

    7.3 N/mm²

    Category II

    0.49 W/mK

    < 0.6 mm/m

    Class A1 Reaction to Fire

    Solid - Group 1

    Standard

     

    140mm

    Available Width

  •  

    BLOCK SIZE

    (L x H x W)

    300mm x 250mm

    300mm x 275mm

    320mm x 280mm

    350mm x 250mm

    300mm x 215mm

    BLOCKS

    PER PACK

    72

    72 / 63

    54

    48 / 56

    70

    BLOCKS

    PER m²

    21.5

    25.6

    21.5

    23.4

    20.2

    23.0

    18.5

    25.6

    29.6

    BLOCKS

    PER LINEAR m²

    3.23

    3.85

    3.23

    3.51

    3.03

    3.45

    2.78

    3.85

    4.44

    LINEAR PER m²

    PER PACK

    22.32

    18.72

    22.32 / 19.53

    20.52 / 17.96

    17.82

    15.66

    17.28 / 20.16

    12.48 / 14.56

    15.75

    LAYING

    ORINETATION

    If walled 300mm length (a 250 wide wall)

    If walled 250mm length (a 300 wide wall)

    If walled 300mm length (a 275 wide wall)

    If walled 275mm length (a 300 wide wall)

    If walled 320mm length (a 280 wide wall)

    If walled 280mm length (a 320 wide wall)

    If walled 350mm length (a 250 wide wall)

    If walled 250mm length (a 350 wide wall)

    If walled 215mm length (a 350 wide wall)

    There are two sets of values for some products due to our pack sizes varying at different manufacturing locations. Please check details with your nearest sales office.

     

    Block weights quoted are approximate and include the typical additional weight from the natural moisture content although this can vary slightly.

    • The m² figures include the conventional 10mm mortar joint.
    • Pack size quantities may vary between manufacturing locations. Always check details with your nearest sales office.