For sales, product and technical advice
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We are Part of the Thomas Armstrong Group
Airtec Standard are the perfect all-round residential aerated concrete blocks giving you a combination of medium strength and high thermal performance in one block.
These concrete wall blocks are unique in combining a thermal conductivity of only 0.11 W/mK, with a compressive strength of 3.6 N/mm² to allow flexible design for single and multi-storey construction.
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, they boast the very best possible dimensional tolerance category of 'Thin Layer Mortar B' (TLMB) but are perfectly suitable for conventional 10mm mortar joint construction. These Aerated Blocks are smooth faced but are not intended for fair-faced use due to the natural air bubbles on the block surface.
Our Airtec Concrete blocks 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.
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.
APPLICATIONS
ADVANTAGES
CE CERTIFICATIONS
PROPERTY
REFERENCE
VALUE
Face Size (L x H)
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
620mm x 215mm
100mm
115mm
125mm
140mm
190mm
215mm
TLMB (Thin Layer Mortar Category B)
530 (±50) kg/m³
3.6 N/mm²
Category I
0.11 W/mK
0.13 W/mK
0.40 mm/m
Class 1 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.
BS EN 1745
BS EN 1996-1-1
PROPERTY
BLOCK WIDTH
100mm
115mm
125mm
140mm
190mm
215mm
‘R’ Value
Walled Weight
Sound Reduction
Block Weight
0.91 m²k/W
61 kg/m²
40 Rw, dB
7.3 kg
1.05 m²k/W
70 kg/m²
40 Rw, dB
8.4 kg
1.14 m²k/W
76 kg/m²
41 Rw, dB
9.1 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-loadbearing plastered wall. Based on the inclusion of conventional 10mm mortar joints.
1.27 m²k/W
85 kg/m²
42 Rw, dB
10.2 kg
1.73 m²k/W
115 kg/m²
45 Rw, dB
13.8 kg
1.95 m²k/W
130 kg/m²
46 Rw, dB
15.6 kg
Fire Resistance
4 Hours
4 Hours
4 Hours
4 Hours
6 Hours
6 Hours
BLOCK WIDTH
BLOCKS PER PACK
m² PER PACK
WEIGHT PER PACK kg
BLOCKS PER m²
100mm
115mm
56
48
7.94
6.80
498
491
7.05
125mm
48
6.80
534
140mm
40
5.67
498
190mm
32
4.54
541
215mm
28
3.97
536
The Thomas Armstrong Group is a trusted supplier of
RESOURCES
CONTACT
Registered Office:
Thomas Armstrong (Concrete Blocks) Ltd
Part of the Thomas Armstrong Group
Workington Road
Flimby
Maryport
Cumbria
CA15 8RY
T: 01900 68211
F: 01900 602672
www.thomasarmstrong.co.uk