Roofers work in teams since the work is intensive and dangerous. One particular danger is wind, since it can go up the side of the house or building and across the work surface where it lifts or moves anything it can. Another danger is walking on a steeply pitched roof. A rooftop has obstacles, including sometimes electrical equipment, that a roofer must be wary of. One may step right into or on top of something regrettable if one is not alert at all times. Roofing is a core of 3D's jobs.
The state of California has a particular licensing process for roofers. To get a state license and become a licensed roofing contractor in California, one needs to obtain a C-39 license before contracting any roofing jobs over the amount of $601.00. If the work is performed without a license, the homeowner may be stuck with unsatisfactory results and have no way to get assistance to correct the problems. If a licensed roofing contractor has problems that relate to unfinished work or the work is faulty in any way, the homeowner or property owner can at least file a claim against the roofing contractors' performance bond for the cost of repairs, damages or unfinished work that must be still be completed. Obtaining a bond is a prerequisite before any license will be issued and it must be in good standing and renewed every 2-years or the contractors' license could be revoked.