| Company | City | State / Province | Country | Phone | Website |
|---|---|---|---|---|---|
| Horizon Stone, LLC | Chattanooga | TN | US | (423) 629-0801 | horizon-stone.com |
| IDEAL Block | Westford | MA | US | (781) 894-3200 | idealconcreteblock.com |
| IDEAL Block | Waltham | MA | US | (781) 894-3200 | idealconcreteblock.com |
| IDEAL Block | Waltham | MA | US | (781) 894-3200 | idealblock.com |
| Interlock Concrete Products Inc | Jordan | MN | US | (204) 326-3445 | interlock-concrete.com |
| Interlock Concrete Products, Inc. | Jordan | MN | US | (204) 326-3445 | interlock-concrete.com |
| Isobloc | Mascouche | QC | CA | (888) 271-2562 | isobloc.com |
| Jandris Block | Gardner | MA | US | (978) 632-0089 | jandrisblock.com |
| Jewell an Oldcastle Company | Waco | TX | US | (770) 522-5600 | jewellcp.com |
| Jewell An Oldcastle Company | Plano | TX | US | (770) 522-5600 |
Concrete Masonry & Hardscapes Association