Safety is everyone’s responsibility. Make sure the area you are working is cleared and people and animals are kept out of the way as dropping tools or equipment can occur.
Working from ladders and planks make sure equipment has sturdy footing and secure.
Working from the roof; always wear good gripping footwear and use any safety restraint system as required.
Final word: Working at heights is dangerous without appropriate safety precautions. Please check with relevant local/state authorities to see what you can do to be safe on the roof, or if any rules or laws apply. Working at heights is not for everyone, if you are uncomfortable of heights, have any medical condition that can impede this, don’t have quality equipment, then please leave it to the professionals.