Working at heights and slippery, uneven surfaces is HAZARDOUS. Every effort should be made to reduce the risk of injury and property damage (Contact your local Work Cover Authority or local council for site-specific safety regulations).
Some safety considerations include:
Use a safety harness anchored correctly (have a contingency with an extra person to assist with any potential falls)
Wear protective clothing such as non-slip shoes, sun protection (i.e. hats, gloves, sunscreen), and gloves
Handle the product with care (wear gloves); it does have sharp edges
Do not work in the rain or on wet surfaces
Use a quality ladder and scaffolds on stable, even ground
Ensure no overhead power lines in your vicinity
Ensure you use well-maintained tools
Keep children and pets away from the work area