This Caution Fragile Roof Sign is perfect for use as a warning sign in the agricultural industry, farms, factories, industrial buildings or other premises with fragile roofs. Designed to be used outside it is fully waterproof and is used to inform and warn, employees, tradesmen and many others of a potential danger of a roof that may pose a hazard if walked upon. The Health and Safety (Safety Signs and Signals) Regulations 1996, recommend that where a risk cannot be completely removed a suitable warning sign should be displayed to warn people of a possible danger.