Thermalite T&G Trench Block 4N 300mm

Item Code: 446510323

£4.49 Ex VAT £5.39 Inc VAT

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Thermalite Trenchblock Tongue and Groove is an excellent alternative to the construction of cavity walls with concrete infill, engineering bricks or large aggregate blocks for foundations. The 300mm tongue and groove design make the blocks simpler to fit together than standard blocks, saving time during construction Its unique design also removes the need for the masonry to be used on prep-ends, making it an economical purchase.


  • Improves thermal performance
  • Can be used in thin joint masonry, saving time and money 
  • Removes the need to mortar perp ends
  • Moisture resistance