Pile stones in a wheelbarrow and push it to the stone wall if additional rocks are needed for the repair job. You will need a mixture of large, medium and small stones for the repair project. If you have a large section of wall to repair, wheel a load of crushed rock to the work area.
If possible, refer to photos of the stone wall before the damage took place. Place a medium- or large-size rock in the first break or hole in the wall. Protect your hands with a pair of work gloves.
Scoop a handful of crushed stones or small rocks to layer under a rock that is easily moved back and forth. If it moves too easily, it could collapse the wall again. Test the stone by wiggling it. If it remains stable, you can add another rock on top of it.
Stand up and move away from the wall. Look at it from several angles to be sure that it has no stones that are jutting out too far on the sides. Fill in any holes with small stones or crushed rock to keep the look of the original Irish stone wall. Ensure that a small- or medium-size stone conceals the crushed rock.
Place a level along the top of the wall to ensure the repaired area lines up with the height of the original wall. An older Irish stone wall might not be completely level.