North West Timber Treatments Ltd.

300mm Thermal 3.6N Trench Block

toplite-foundation main
Product code BB300TTB
  • £5.96
  • £7.15
(Out of stock)


These lightweight aggregate blocks are designed to offer the builder a low weight, loadbearing block with enhanced thermal properties suitable for a wide range of applications.

Ultralite blocks are manufactured to BS EN 771-3 and are ISO 9001 Quality Assured, ISO 14001 Environmentally Certified and hold BES 6001 ‘Excellent’.

Weighing less than 20kg, these high-quality aggregate blocks are manufactured from low density, quality aggregates and available in a range of sizes. These lightweight concrete blocks are only available in a ‘Standard’ texture finish providing an excellent surface for mortars, renders and plasters.


  • Inner and outer leaf of cavity walls up to 3 storeys 7.3 N/mm² only; 2 storeys if < 7.3 N/mm².
  • Internal partition walls.
  • Walls below damp-proof course (DPC) (7.3 N/mm² only).
  • Acoustic separating walls to Part E of the Building Regulations.
  • BRE Green Guide A+ rated walls.
  • 'Standard’ texture finish which provides an excellent surface for mortars, renders and plasters.

Pack Size - 15 Per Pallet

If you have any questions about our 300mm Thermal 3.6N Trench Block then call our sales team on 01942 720777 or email us at

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