| Company | City | State / Province | Country | Phone | Website |
|---|---|---|---|---|---|
| GMS-Lawrenceville, an Oldcastle Company | Lawrenceville | GA | US | (770) 804-3363 | belgard.biz |
| GMS-Tyrone, an Oldcastle Company | Tyrone | GA | US | (770) 804-3363 | belgard.biz |
| Greensburg Construction Products | Cambridge Springs | PA | US | (412) 362-3800 | |
| Groupe MBM | Piedmont | PQ | US | (450) 227-2547 | groupembm.com |
| Hagerstown Block Company | Hagerstown | MD | US | (301) 733-3510 | hagerstownblock.com |
| Hardscapes USA - Birmingham | Birmingham | AL | US | (770) 804-3363 | hardscapesusa.com |
| Hardscapes USA - Georgia Division | Lawrenceville | GA | US | (770) 804-3363 | specblockusa.com |
| Hardscapes USA - Mobile | Mobile | AL | US | (770) 804-3363 | |
| Horizon Stone, LLC | Chattanooga | TN | US | (423) 629-0801 | horizon-stone.com |
| IDEAL Block | Westford | MA | US | (978) 692-3076 | idealblock.com |
Concrete Masonry and Hardscapes Association