| Business | Phone |
| American Building Products 7761 Jessup Rd, Jessup 20794 | (301) 621-2200 |
| American Building Products 7761 Md Route 175, Jessup 20794 | (301) 621-2200 |
| Larsen Products Corp 8264 Preston Ct, Jessup 20794 | (301) 776-4595 |
| Owens-Corning Fiberglas 8235 Patuxent Range Rd, Jessup 20794 | (410) 792-4611 |