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We are Part of the Thomas Armstrong Group
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’ 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 load-bearing 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
KEY ADVANTAGES
UKCA CERTIFICATIONS
UKCA35 MIDI (290) Standard Block - 7.3 N/mm²
UKCA36 MIDI (290) Standard Block - 10.4 N/mm²
UKCA39 MIDI (300) Standard Block - 7.3 N/mm²
UKCA40 MIDI (300) Standard Block - 10.4 N/mm²
UKCA37 MIDI (290) Paint-grade Block - 7.3 N/mm²
UKCA38 MIDI (290) Paint-grade Block - 10.4 N/mm²
UKCA41 MIDI (300) Paint-grade Block - 7.3 N/mm²
UKCA42 MIDI (300) Paint-grade Block - 10.4 N/mm²
UKCA65 MIDI 300 Standard - 15.0 N/mm²
UKCA67 MIDI 300 Standard - 17.5 N/mm²
UKCA66 MIDI 300 Paint-grade - 15.0 N/mm²
UKCA68 MIDI 300 Paint-grade - 17.5 N/mm²
UKCA69 MIDI 300 Paint-grade - 22.5 N/mm²
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
* Higher strengths are available to order
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
278 kg/m²
52 Rw, dB
17.6 kg
0.12 m²k/W
278 kg/m²
52 Rw, dB
18 kg
‘R’ Value
Walled Weight
Sound Reduction
Block Weight
Walled weight is for a single-leaf wall, plastered on both sides.
Sound Reduction Rw values are based on wall mass and assumes a plastered finish on both sides.
The block weights quoted above are approximate and include the typical additional weight from the moisture content.
Fire resistance periods to BS EN 1996-1-2 for a single-leaf, non load-bearing plastered wall.
Fire Resistance
4 Hours
4 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.