Summary
A tongue-and-groove trench block that ensures alignment and stability, reduces mortar requirements, and speeds up installation.
A tongue-and-groove trench block that ensures alignment and stability, reduces mortar requirements, and speeds up installation.
A tongue-and-groove trench block that ensures alignment and stability, reduces mortar requirements, and speeds up installation.
Application
Suitable for applications including:
- Cavity walls (external and internal leaves) below DPC level.
- Solid external walls below DPC level.
Suitable for applications including:
- Cavity walls (external and internal leaves) below DPC level.
- Solid external walls below DPC level.
Suitable for applications including:
- Cavity walls (external and internal leaves) below DPC level.
- Solid external walls below DPC level.
Description
Thermalite Hi-Strength 7 Trenchblock is an engineered concrete block that provides durability and structural integrity, featuring a tongue-and-groove design for improved alignment and stability.
Features and benefits:
- Tongue-and-groove design.
- Low air permeability.
- Available in a range of widths.
- Manufactured in accordance with BS EN 771-4.
- Complies with all relevant Masonry Wall Robust Details.
- Aids in compliance of Building Regulations - Approved Documents Part A, B, E & L.
- Suitable for use below DPC level.
- High-strength coursing block with a compressive strength of 7.3 N/mm².
- BBA-certified.
- BES 6001-certified.
Thermalite Hi-Strength 7 Trenchblock is an engineered concrete block that provides durability and structural integrity, featuring a tongue-and-groove design for improved alignment and stability.
Features and benefits:
- Tongue-and-groove design.
- Low air permeability.
- Available in a range of widths.
- Manufactured in accordance with BS EN 771-4.
- Complies with all relevant Masonry Wall Robust Details.
- Aids in compliance of Building Regulations - Approved Documents Part A, B, E & L.
- Suitable for use below DPC level.
- High-strength coursing block with a compressive strength of 7.3 N/mm².
- BBA-certified.
- BES 6001-certified.
Thermalite Hi-Strength 7 Trenchblock is an engineered concrete block that provides durability and structural integrity, featuring a tongue-and-groove design for improved alignment and stability.
Features and benefits:
- Tongue-and-groove design.
- Low air permeability.
- Available in a range of widths.
- Manufactured in accordance with BS EN 771-4.
- Complies with all relevant Masonry Wall Robust Details.
- Aids in compliance of Building Regulations - Approved Documents Part A, B, E & L.
- Suitable for use below DPC level.
- High-strength coursing block with a compressive strength of 7.3 N/mm².
- BBA-certified.
- BES 6001-certified.
Color
Grey
Grey
Grey
Finish
Micro-textured
Micro-textured
Micro-textured
Material
Autoclaved aerated concrete (AAC)
Autoclaved aerated concrete (AAC)
Autoclaved aerated concrete (AAC)
Shape
Rectangle
Rectangle
Rectangle
Length
440 mm
440 mm
440 mm
Width
255 mm, 300 mm, 355 mm
255 mm, 300 mm, 355 mm
255 mm, 300 mm, 355 mm
Height
215 mm
215 mm
215 mm
Specification
Classification data
Standard
To BS EN 771-4.
To BS EN 771-4.
To BS EN 771-4.
Environmental performance requirements
-
-
-
Environmental rating
BES 6001-certified.
BES 6001-certified.
BES 6001-certified.
Configuration
Group 1.
Group 1.
Group 1.
Mean compressive strength (minimum)
-
-
-
Category
II.
II.
II.
Freeze-thaw resistance
Not to be left exposed.
Not to be left exposed.
Not to be left exposed.
Thermal conductivity (maximum)
0.29 W/mK.
0.29 W/mK.
0.29 W/mK.
Work sizes (length x width x height)
440 x 255 x 215 mm.
-
-
Accessories or special shapes
-
-
-
Type
Coursing blocks.
Coursing blocks.
Coursing blocks.
Tolerance category
GPLM.
GPLM.
GPLM.
Density
730 kg/m³.
730 kg/m³.
730 kg/m³.
Reaction to fire
Class A1 to BS EN 13501-1.
Class A1 to BS EN 13501-1.
Class A1 to BS EN 13501-1.
Moisture movement
0.5 mm/m.
0.5 mm/m.
0.5 mm/m.
Shear bond strength
0.15 N/mm².
0.15 N/mm².
0.15 N/mm².
Water vapour permeability
5/10.
5/10.
5/10.
Work sizes (length x width x height)
-
440 x 300 x 215 mm.
-
Work sizes (length x width x height)
-
-
440 x 355 x 215 mm.
Additional properties
Unit weight
23.2 kg.
27.2 kg.
32.2 kg.
Mean compressive strength (minimum)
7.3 N/mm².
7.3 N/mm².
7.3 N/mm².
Thermal Conductivity:
λ10, dry unit, S2, 0.16 W/m·K.
Below DPC level: 0.29 W/m·K.
Below DPC level: 0.29 W/m·K.
λ10, dry unit, S2, 0.16 W/m·K.
Below DPC level: 0.29 W/m·K.
Below DPC level: 0.29 W/m·K.
λ10, dry unit, S2, 0.16 W/m·K.
Below DPC level: 0.29 W/m·K.
Below DPC level: 0.29 W/m·K.
Vapour resistivity
50 MN·s/g·m.
50 MN·s/g·m.
50 MN·s/g·m.
Third-party certification
BBA Certificate 00/3720 Product Sheet 1.
BBA Certificate 00/3720 Product Sheet 1.
BBA Certificate 00/3720 Product Sheet 1.
Sustainability data
Country of product manufacture
United Kingdom
United Kingdom
United Kingdom
Material
Autoclaved aerated concrete (AAC)
Autoclaved aerated concrete (AAC)
Autoclaved aerated concrete (AAC)
Recyclability
Yes
Yes
Yes
Recycled content
80 %
80 %
80 %