Sheet metal workers typically work 40 hours per week, though a small percentage of workers who are self-employed may work nights or weekends to complete time-sensitive projects on a construction site or inside a sheet metal shop. Those working at construction sites typically work inside the structure, usually near the end of the structure's completion and usually don't need to adjust their schedules due to inclement weather. However, those employed in applying metal products to roofs or outdoor structures often work around unfavourable weather conditions.
Sheet metal working is labor-intensive. Workers must lift heavy materials and equipment, stand for long periods of time, bend over, and sometimes crawl into small spaces to install products. Because of the risk of burns, cuts from sharp metal, and falls at construction sites, sheet metal workers employ rigid safety practices on the job. The environment, in addition to being dangerous, is often noisy or allows exposure to toxic fumes from chemicals used in construction and metal preparation.