For the larger projects, we use Geosynthetic Technology Ltd who supply and install plastic liners for the 100% sealing of lakes and ponds. These products, referred to as ‘geomembranes’, are covered with the benefit of a 30 year warranty and the back up of the company’s £2 million professional indemnity insurance. Geosynthetic Technology Ltd is the leader in this specialised field and undertakes site installations of 10 to 10000 m2+.