Thermalite Trenchblock Tongue and Groove is an alternative to the construction of cavity walls with concrete infill, engineering bricks or heavy aggregate blocks for foundations. It is available as Hi-Strength Trenchblock (with compressive strength of 7.3N/mm2) and with tongue and groove joints and handholds for easy handling.
 
Benefits
Improves thermal performance
Available in standard or with tongue and groove joints and handholds
Can be used in thin joint masonry, saving time and money
Removes the need to mortar perp ends
Moisture resistance
 
Applications: Foundations