Thatching is very old, low-cost method of roofing, passed down between generations over three centuries. Thatching is a specialised craft that uses dry vegetation such as straw, water, sedge and rushes. The trick is to lay the vegetation in a particular way so to shed water away from the inner roof. In modern Britain, thatching has become fairly trendy with people who want to be more environmentally friendly or simply want the rustic look. Thatched cottages are typically found in British villages. Thatching, like any roofing, demands regular maintenance. Experts advice that a thatched roof lasts for 8-14 years and 're-ridging' will be necessary several times during the lifespan. Potential homeowners should be aware that insurance can sometimes be more expensive due to perceived fire risk.