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Thermalite Hi-Strength 7 Trenchblock (Tongue & Groove)
Verified by manufacturer 2 days ago
440 x 255 x 215 mm
440 x 255 x 215 mm
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.
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.
General information
Color | Grey |
Finish | Micro-textured |
Material | Autoclaved aerated concrete (AAC) |
Shape | Rectangle |
Length | 440 mm |
Width | 255 mm 300 mm 355 mm |
Height | 215 mm |
Uniclass | |
CAWS | F1/310 Aerated concrete blocks F10/370 Thin-joint autoclaved aerated concrete (AAC) common blockwork F10/360 Autoclaved aerated concrete (AAC) common blockwork F10/37 Autoclaved aerated concrete (AAC) common blockwork F10/39 Thin joint autoclaved aerated concrete (AAC) common blockwork |
Specification data - Autoclaved aerated concrete (AAC) blocks
Classification data | |
Standard | To BS EN 771-4. |
Environmental performance requirements | |
Environmental rating | BES 6001-certified. |
Configuration | Group 1. |
Mean compressive strength (minimum) | |
Category | II. |
Freeze-thaw resistance | Not to be left exposed. |
Thermal conductivity (maximum) | 0.29 W/mK. Guidance for specification option: Thermal Conductivity - λ10, dry unit, S2: 0.16 W/mK. |
Work sizes (length x width x height) | 440 x 255 x 215 mm. Guidance for specification option: Tolerances:
|
Accessories or special shapes | |
Type | Coursing blocks. |
Tolerance category | GPLM. |
Density | 730 kg/m³. Manufacturer guidanceGross dry density. |
Reaction to fire | Class A1 to BS EN 13501-1. |
Moisture movement | 0.5 mm/m. Manufacturer guidanceNominal value. |
Shear bond strength | 0.15 N/mm². |
Water vapour permeability | 5/10. |
Unit weight | 23.2 kg. Manufacturer guidanceGross density + 50 kg/m³ at 23% moisture. |
Mean compressive strength (minimum) | 7.3 N/mm². |
Thermal Conductivity: | λ10, dry unit, S2, 0.16 W/m·K. Below DPC level: 0.29 W/m·K. |
Vapour resistivity | 50 MN·s/g·m. |
Third-party certification | BBA Certificate 00/3720 Product Sheet 1. |
Sustainability data
Country of product manufacture | United Kingdom |
Material | Autoclaved aerated concrete (AAC) |
Recyclability | Yes |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 80 % |
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