When this condition is minor, you need not repair the wall immediately. However, any noticeably buckled wall will eventually collapse from normal ground pressures and seasonal temperature changes. When buckling has seriously weakened the wall, the damaged parts should be rebuilt immediately. Vertical reinforcements may need to be constructed into walls over 15 feet long. Settled walls and footings are indicated by vertical cracks either in small areas or throughout the structure.
Repairs are difficult without special equipment.
Contact a reliable contractor for this work. Regularly check walls for cracks and rising damp, and consult a specialist if concerned. Remove any low-permeability internal finishes such as vinyl paper, ceramic tiles and gloss paint, which will slow down or prevent drying out. Hose and scrub down external walls. Inspect cavities either by getting a specialist to use an optical probe or by carefully removing bricks and identify the internal conditions.