Ballast Netting is a cost-effective way to deter Gulls and Crows from picking up and dropping ballast pebbles from height. Ballasted rooftops are growing as a popular building option in schools, hospitals and larger Office blocks. They offer an aesthetically pleasing, cost effective covering for warmer roofs that merges well with a range of architectural styles. Young seagulls practice the smashing of shells to obtain food by picking up ballast & stone and dropping them on to hard surfaces, this is behaviour they copy from parents and can occur all year round. Falling ballast is a clear Health and Safety risk to the public and all who use the buildings and surrounding areas such as car parks and outside space areas on a daily basis