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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.
Airtec Large wall blocks are designed to provide significantly improved thermal insultation and air-tightness for internal and external walls by reducing the proportion of mortar joints in a wall. This effect is even greater when used in conjunction with 2mm thin-joint construction where the mortar proportion can be reduced by around 87% when compared to conventional walls using 10mm mortar joints.
They can also be used as Flooring, see Large Aerated Concrete Floor Blocks for more information.
These Concrete Wall Blocks can halve the number of blocks required to construct a wall all as opposed to traditional 215mm high wall blocks. However even though they are twice the height of a normal 215mm block, their very low weight complies with the manual handling guidelines and minimises the amount of repetitive lifts required.
All Airtec products are ISO 9001 Quality and ISO 14001 Environmentally certified and with the highest possible BES 6001 Responsible Sourcing rating of ‘Excellent’.
In common with all other Airtec blocks, these lightweight large concrete blocks offer the very best possible dimensional tolerance category of 'Thin Layer Mortar B' (TLMB) but are perfectly suitable for conventional 10mm mortar joint construction.
Our Aerated Blocks for walls are available in ‘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
ADVANTAGES
UKCA CERTIFICATIONS
PROPERTY
REFERENCE
3.6 N/mm²
7.3 N/mm²
Face Size (L x H)
Available Widths
Dimensional Tolerance
Gross Dry Density
Mean Compressive Strengths
Transverse Strength (min)
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 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
620mm x 430mm
100mm
Category D1
530 (±50) kg/m³
> 3.6 N/mm²
Both grades exceed 3.5kN transverse strengths for flooring applications
Category I
0.11 W/mK
0.13 W/mK
0.40 mm/m
Class A1 Reaction to Fire
Solid - Group 1
Standard
620mm x 430mm
100mm
Category D1
730 (±50) kg/m³
7.3 N/mm²
Both grades exceed 3.5kN transverse strengths for flooring applications
Category I
0.17 W/mK
0.19 W/mK
0.40 mm/m
Class A1 Reaction to Fire
Solid - Group 1
Standard
Some blocks sizes and strengths are made to order. Please check with our sales office on block availability as far in advance as possible before the blocks are required.
PROPERTY
BLOCK STRENGTH
3.6 N/mm²
7.3 N/mm²
0.91 m²k/W
61 kg/m²
39 Rw, dB
16.5 kg
‘R’ Value
Walled Weight
Sound Reduction
Block Weight
0.59 m²k/W
78 kg/m²
41 Rw, dB
21.8 kg
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 STRENGTH
BLOCKS PER PACK
m² PER PACK
WEIGHT PER PACK kg
BLOCKS PER m²
3.6 N/mm²
7.3 N/mm²
28
28
7.47*
7.47*
564
660
3.61
3.61
*The m² per pack DOES NOT include allowance for the mortar joint; this figure is for the block only.