We are Part of the Thomas Armstrong Group
Hollow Dense concrete blocks are ideal for applications where a durable, lower-weight and high strength wall is required, either above or below damp-proof course (DPC). They are available in ‘Standard’ or ‘Paint-grade’ finishes.
The hollow cores can be filled with poured concrete and reinforced with steel to form incredibly strong walls for applications such as agricultural sheds, commercial and industrial buildings, storage bunkers, pond and pool linings and retaining walls.
Our Hollow Blocks are manufactured from high quality class 2 aggregates and consist of up to 30% recycled raw materials.
Hollow Dense Blocks are manufactured to BS EN 771-3 and are ISO 9001 Quality Assured, ISO 14001 Environmentally Certified and hold BES 6001 ‘Excellent’ and most locations.
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 block.
KEY ADVANTAGE
PROPERTY
REFERENCE
'STANDARD' & 'PAINT-GRADE' FINISH VALUES
Face Size (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
Available Widths
440mm x 215mm
Category D1
1850 - 2100 kg/m³
7.3 N/mm²
Category II
0.88 W/mK
0.92 W/mK
< 0.6 mm/m
Class A1 Reaction to Fire
Hollow - Group 2
Standard or Paint-grade
140mm, 190mm or 215mm
PHYSICAL PROPERTY
BLOCK WIDTH
140mm
190mm
215mm
0.16 m²k/W
210 kg/m²
50 Rw, dB
19.6 kg
0.24 m²k/W
285 kg/m²
52 Rw, dB
26 kg
‘R’ Value
Walled Weight
Sound Reduction
Block Weight
0.17 m²k/W
282 kg/m²
51 Rw, dB
23.5 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
4 Hours
BLOCK WIDTH
BLOCKS PER PACK
m² PER PACK
140mm
190mm
60
40
6.0
4.0
Pack details may vary slightly between manufacturing locations. Always check details with your nearest sales office.
215mm
40
4.0