All of the databases below are provided by EBSCO. You can search them all at once by choosing any one of them and then clicking "Choose Databases" above the search box and selecting the others from the dropdown.
You can create lists of companies by NAICS/SIC code, location, size and more in MergentOnline, ThomsonOne and Reference USA.
NAICS: 332322 - Roofing, Sheet Metal manufacturing
SIC: 3444 - Sheet Metalwork