Construction> Interior Walls See Also: Windows & Doors | Ledger Boards/2nd Floor | Bracing Walls | Cabinets/Heavy Fixtures | Plumbing/Electrical Utilities  | Index of Technical Drawings Soundproof, Strong, Stylish Grid-Wall™ may be used for the construction of all interior walls and will greatly strengthen any design. The placement of block and rebar is exactly the same for exterior walls with consideration for placement of conduit etc. Conventional Interior Walls Conventional construction methods may be used for interior walls if desired. Attach the metal or wood stud of the interior wall to the exterior wall by bolting with lag bolts long enough to reach into the void. Glue the stud in place (this will keep the stud from shifting during the pouring of the concrete).