440mm x 215mm x 300mm Thermalite T&G Trench Block 3.5N
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440mm x 215mm x 300mm Thermalite T&G Trench Block 3.5N

Product Code: B020493

(per TN ex VAT)
(inc VAT)

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.

Key Features
- 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

- Foundations

Face Dimension
440 x 215mm

Block Thickness

Block Weight


Thermal Conductivity
0.15W/m.K (Above DPC), 0.24W/m.K (Below Ground)


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Glass Wool