NBS Source
MIDI Concrete Block

Application

Suitable for use in the following:

  • Walls below DPC.
  • Internal partition walls.
  • Inner and outer leaf of external cavity walls over three storeys.
  • Acoustic separating party walls to Building Regulations (E&W) Approved Document E and Robust Details.
  • BRE green guide A+ rated walls.
  • Provides an excellent surface for mortars, renders and plasters.

Description

MIDI blocks offer the same characteristics of a 140 mm dense concrete block but at only 66% of the weight.


Features and benefits:

  • Manufactured to BS EN 771-3.
  • Manufactured from Class 2 aggregates.
  • Consist of up to 30% recycled raw material.
  • Standard texture finish provides an excellent surface for mortars, renders and plasters.

General information

Color

Grey

Finish

Textured

Material

Concrete

Shape

Rectangle

Size

290 x 215 x 140 mm

300 x 215 x 140 mm

Uniclass 2015

Pr_20_93_52_01 Aggregate concrete blocksPrimary

CAWS

F10/18 Concrete facing blockwork

F10/255 Concrete facing blockwork

F10/355 Concrete common blockwork

F10/36 Concrete common blockwork

Specification data - Aggregate concrete blocks Enhanced data

Standard

To BS EN 771-3:2011; ISO9001; BES 6001 'Excellent'.

Block description

Standard common block.

Appearance

Dark Grey.

Configuration

Group 1.

Compressive strength

-

Mean value

Available as standard, higher strengths are available to order.

7.3 N/mm².

10.4 N/mm².

15.0 N/mm².

17.5 N/mm².

Characteristic value

5.5-10.1 N/mm². 

Depending on size.

Specifier to detail.

-

Category

II.

Freeze/ thaw resistance

Frost resistant.

Thermal conductivity

1.17 W/mK (protected inner leaf), 1.26 W/mK (exposed outer leaf).

Thermal resistance

0.12 m² K/W.

Recycled content

30%.

Work sizes (length x width x height)

290 x 215 x 140 mm.

300 x 215 x 140 mm.

Tolerance category

D1.

Density

-

Gross dry density

1850-2100 kg/m³.

Specifier to detail.

-

Reaction to fire

Class A1 to BS EN 13501-1.

Environmental information

Country of product manufacture

United Kingdom

Embodied carbon

147 eCO2/m³

Recyclability

100%

Recycled content

30%

Literature

Concrete Blocks Brochure

Concrete Blocks Brochure

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