Size. Please select 4.5m x 100m 4.5m x 11.1m 2.25m x 100m. From £39.80. Product Description. Product Specification. Product Description. Terram 1000 Robust and durable, Terram T1000 geotextile helps prevent the intermixing of solid pales between the layers of soil, yet still permits water to permeate. The tensile strength, high stiffness