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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.

2.9 N/mm² LIGHTWEIGHT AERATED CONCRETE WALL BLOCKS

Airtec XL is our lowest weight and thermally best performing wall blocks in our entire Airtec block range, possessing a thermal conductivity value of only 0.09 W/mK - unique and unrivalled by any other aerated concrete block with a strength of 2.9 N/mm².

In common with all other Airtec Aerated blocks, they offer the very best possible dimensional tolerance category of 'Thin Layer Mortar B' (TLMB) but are perfectly suitable for conventional 10mm mortar joint construction. The inner leaf of Airtec XL blocks gives the builder the option of using a 75mm cavity, either partially-filled or fully-filled whilst still achieving a U-Value of 0.30 W/m²K.

All Airtec products are ISO 9001 Quality and ISO 14001 Environmentally certified and with the highest possible BES 6001 Responsible Sourcing rating of ‘Excellent’.

Our Aerated Concrete Wall Blocks are a cost-effective solution to the ever-increasingly stringent requirements of Part L of the Building Regulations. This allows the builder to minimise the amount of secondary insulation required to meet thermal regulations, as well as meeting the strength requirements of the very latest UK building codes.

Our Airtec Concrete blocks are available in a ‘Standard’ texture finish providing a plain-faced, smooth, cellular texture which is a suitable background for accepting renders and plasters.

In common with all aerated concrete in the UK, the surfaces of the building blocks may contain a random number of larger natural air bubbles/cells on the block surface due to an unavoidable consequence of the manufacturing process. These large cells are perfectly normal and are not a defect and do not detract from performance in any way. Although the blocks can be painted, we cannot guarantee that the surfaces will not contain some of these larger cells and we therefore do not recommend using Airtec for paint-grade or fair-faced applications.

APPLICATIONS

  • Inner and Outer leaf of cavity walls up to 2 storeys.
  • External Cavity or Solid Walls.
  • Loadbearing and non-loadbearing walls.
  • Flanking walls to Party Walls.
  • Internal partition walls.
  • Thin-Joint Construction.
  • Fire resistant walls.
  • ‘Standard’ texture finish providing suitable background for accepting renders and plasters.
  • BRE Green Guide A+ rated walls.

ADVANTAGES

  • ISO 9001 & ISO 14001 Certified
  • BES 6001 "EXCELLENT" Sustainability rating.
  • Manufactured to BS EN 771-4.
  • BBA Certified, Category 1 Manufactured.
  • Lowest Weight.
  • Exceptional thermal performance.
  • Cost-effective solution.
  • Safer handling
  • Easy to cut, drill and chase.
  • Accepts a range of aerated block light to heavy-duty fixings.

DOCUMENTS

  •  

    PROPERTY

    REFERENCE

    VALUE

    Face Size (L x W)

    Available Widths

    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 Finish

    BS EN 771-4

     

    BS EN 772-16

    BS EN 772-13

    BS EN 772-1

    BS EN 771-4

    BS EN 1745

    BS EN 1745

     

    BS EN 771-4

    BS EN 13501-1

    BS EN 1996-1-1

    440mm x 215mm

    100mm
    115mm
    125mm
    140mm
    190mm
    215mm

    TLMB (Thin Layer Mortar Category B)

    460 (±50) kg/m³

    2.9 N/mm²

    Category I

    0.09 W/mK

    0.10 W/mK

    0.40 mm/m

    Class 1 Reaction to Fire

    Solid - Group 1

    Standard

    BS EN 1745

  •  

    PROPERTY

    BLOCK WIDTH

    100mm

    115mm

    125mm

    140mm

    190mm

    215mm

    1.28 m²k/W

    ‘R’ Value

    1.11 m²k/W

    1.39 m²k/W

    1.56 m²k/W

    2.11 m²k/W

    2.39 m²k/W

    Walled Weight

    Sound Reduction

    Block Weight

    Fire Resistance

    54 kg/m²

    38 Rw, dB

    6.3 kg

    4 Hours

    62 kg/m²

    39 Rw, dB

    7.3 kg

    4 Hours

    67 kg/m²

    40 Rw, dB

    7.9 kg

    4 Hours

    76 kg/m²

    41 Rw, dB

    8.8 kg

    4 Hours

    101 kg/m²

    43 Rw, dB

    12.0 kg

    6 Hours

    117 kg/m²

    44 Rw, dB

    13.5 kg

    6 Hours

  •  

    BLOCK WIDTH

    BLOCKS PER PACK

    m² PER PACK

    WEIGHT PER PACK kg

    BLOCKS PER m²

    100mm

    115mm

    125mm

    56

    48

    48

    7.94

    6.80

    6.80

    • A range of a wagon sizes are available, with or without pallets. Ring your local Sales office for further details.
    • Other thicknesses available to order but are not kept as general stock sizes
    • Block weight is at the equilibrium moisture content of 3% by weight
    • Pack weight allows for maximum moisture content when packed, actual delivered weight will be less
    • m² per pack figure based on the inclusion of conventional 10mm mortar joints
    • Health & Safety guidelines recommend that precautions be taken when using blocks over 20kg in weight.

    140mm

    190mm

    215mm

    40

    32

    28

    5.67

    4.54

    3.97

    433

    426

    464

    7.05

    433

    444

    428