This graduation thesis covers specifications, properties and functions of geosynthetic
materials used for filtration and separation purposes. It also describes different requirements
covered in standards and presents possible design solutions for different types of use. The
work discusses in detail the importance on knowledge of materials when designing with
geotextiles and presents basic information for the reader to understand how material
properties and soil properties influence the decision on final design choice. Problems that
may occur during installation, or during design phase, are also described.