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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.

MIDI 'Standard' or 'Paint-grade'

SMALL FORMAT SOLID DENSE CONCRETE BLOCKS

MIDI ‘Standard’ texture finish is for general background applications whereas 'Paint-grade' finish is available for internal fair-faced applications. It offers the same characteristics of a 140mm solid dense concrete blocks but at only 66% of the weight it gives you a lighter block with easier manual handling.

Our MIDI blocks are 140mm in width but are available with a shorter length of either 290mm or 300mm instead of the standard 440mm. This results in a significant reduction of handling weight of up to 33% a conventional 140mm solid dense block. Therefore, the MIDI offers you a 140mm solid dense concrete block with weights well below the recommended limit of 20kg for repetitive manual handling.

 

In common with all Dense Concrete blocks, MIDI blocks are a highly resilient and tough loadbearing block available in strengths of 7.3 N/mm² or greater, suitable for use above and below damp-proof course (DPC).

 

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

APPLICATIONS

  • Inner and Outer leaves of cavity walls over 3 storeys.
  • Internal partition walls.
  • Walls below damp-proof course (DPC).
  • Acoustic separating walls to Part E of the Building Regulations and Robust Details.
  • ‘Standard’ texture finish provides an excellent surface for mortars, renders and plasters.
  • ‘Paint-grade’ close-textured finish available for internal decorative, paint-grade applications.
  • BRE Green Guide A+ rated walls.

KEY ADVANTAGES

  • Same characteristics of a 140mm solid dense concrete block but 66% of the weight.
  • Easier manual handling.
  • Robust.
  • Accepts most standard fixings.
  • BES 6001 sustainability rating of ‘Excellent’.

DOCUMENTS

  •  

    PROPERTY

    REFERENCE

    'STANDARD' & 'PAINT-GRADE' FINISH VALUES

    Face Sizes (L x H)

    Dimensional Tolerance

    Gross Dry Density

    Mean Compressive Strengths

    Manufacturing Category

    Thermal Conductivity (Protected Inner Leaf)

    Thermal Conductivity (Exposed Outer Leaf)

    Moisture Movement

    Fire Resistance

    Configuration

    Available Texture Finishes

    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 1745

    BS EN 772-14

    BS EN 13501-1

    BS EN 1996-1-1

     

    290mm x 215mm
    300mm x 215mm

    Category D1

    1850 - 2100 kg/m³

    7.3 N/mm²
    10.4 N/mm²

    Category II

    1.17 W/mK

    1.26 W/mK

    < 0.6 mm/m

    Class A1 Reaction to Fire

    Solid - Group 1

    Standard or Paint-grade

     

    140mm

    Available Width

  •  

    PHYSICAL PROPERTY

    BLOCK SIZE (L x H x W)

    290mm x 215mm x 140mm

    300mm x 215mm x 140mm

    0.12 m²k/W

    0.12 m²k/W

    ‘R’ Value

    Walled Weight

    Sound Reduction

    Block Weight

    Fire Resistance

    278 kg/m²

    52 Rw, dB

    17.6 kg

    6 Hours

    278 kg/m²

    52 Rw, dB

    18 kg

    6 Hours

  •  

    BLOCK SIZE (L x H x W)

    BLOCKS PER PACK

    m² PER PACK

    290mm x 215mm x 140mm

    300mm x 215mm x 140mm

    72

    72

    4.8

    5.0

    Pack details may vary slightly between manufacturing locations. Always check details with your nearest sales office.