Concrete Blocks & Bricks
Northstone concrete blocks and bricks are manufactured and distributed from Carryduff serving the Greater Belfast market, Toomebridge supplying Mid Antrim and South Derry, whilst North Tyrone, L'Derry and Donegal are supplied from Strabane.

Northstone concrete blocks and bricks are available from the following locations:
Depot | Telephone |
| Aghadowey | 028 7086 8130 |
| Carryduff | 028 9081 2212 |
| Strabane | 028 7188 4837 |
| Toomebridge | 028 7965 0461 |
The Typical Blocks Manufactured are as follows:
7N Concrete Block 440mm/215mm/100mm
- 10N Concrete Block 440mm/215mm/100mm
- 7N Concrete Block 440mm/ 215mm/150mm
- 10N Concrete Block 440mm/215mm/150mm
- 7N Concrete Block 440mm/300mm/100mm
- 7N Concrete Block 440mm/140mm/100mm
- 15N Concrete Brick