The National Roofing Legal Resource Center (NRLRC) has released A Comprehensive Guide to Wage and Hour Regulations Affecting Roofing Contractors that addresses regulations governing the minimum wage and overtime pay requirements. It also covers the Fair Labor Standards Act regulations including rules for travel time pay, which often are misunderstood.
Links:
[1] http://www.nrca.net/rp/pubstore/details.aspx?c=10&id=521