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The Thermalite Trench Hi-Strength 7 Block 215 x 440 x 140mm (H x L x W) Grey, has been specifically developed for use in the construction of solid foundation walls. This trench Hi-Strength offers the addition of handholds for even easier lifting, along with tongue and groove joints which avoid the need for mortar in the perpends. The Thermalite trench Hi-Strength is a tried and tested, economical alternative to the construction of cavity walls with concrete infill, engineering bricks or heavy aggregate blocks for foundations. The product comes with a thermal conductivity of 0.18W/mK which improves the insulation of the area. The product conforms to EN ISO 9001, BS EN 771-4, BBA, EN ISO 14001, BRE and BS 6001. Forterra is the largest manufacturers of building products in the UK. The manufacturer creates bricks, blocks, precast concrete, paving and many other vital products at an extensive network of 18 manufacturing sites.
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