Description

Thermalite Trenchblock is a tried and tested, economical alternative to the
construction of cavity walls with concrete infill, engineering bricks or heavy
aggregate blocks for foundations.

• For use in soils of up to Design Sulfate Class DS 4
• Available with tongue and groove joints and handholds
• Improves thermal performance
• Eliminates the need to mortar perpends

Working dimensions

• Face dimensions (mm); 440 x 215
• Thickness and weights; Block thicknesses and weights at equilibrium density (for 440 x 215mm)
• Weight; 17.5kg*
• Density: 600Kg/m2
• Strength: 3.6N/mm2

Properties

• Mean compressive strength not less than 3.6N/mm2
• Design thermal conductivity (λ) 0.15W/m.K (above dpc), 0.24W/m.K (below ground)
• Dry thermal conductivity value: (λ10,dry, unit) 0.13W/m.K
• Specified gross dry density 600kg/m3

*Weights quoted are based on 3% equilibrium moisture content. For typical as-received weights the above figures should be
increased by a further 19%. This is, however, dependent on climatic and storage conditions.