Unlike a standard manufacturer bond, a roofing service’s bond won’t cover labor charges for repairs caused by defective accouterments or workmanship. This is a common trap for unconscionable contractors, who may present their bond as an assurance from the manufacturer. The bond won’t be valid if your roof leaks. You aren’t defended from legal and fiscal pitfalls if your roof is damaged.
Source: https://stewcam.com/why-hire-professional-roofing-services-for-your-home/