回复：请师傅来修房顶, 如果他没有License and insurance ,会有什么问题?

depend cost and risk.

If they do not have license and insurance, you take risk. If you have enough insurance and know how to manager handyman, ok.

Usually in my location, if you use a company with full license and insurance, you may pay $65 or higher per  hour. But if you hire a person w/o anything (those ilegal immigrates), you may pay only $8 per hour.