Corrosion of mild steel ties is caused through a reaction of moisture and air causing oxidisation of the steel, this creates up to 7 times expansion of the metal causing lifting and separation of bed joints and ultimately destabilization of outer leaf of masonry. Restruct replace these old ties with new 304 grade stainless steel remedial ties, the old corroding ties are either isolated or removed to prevent further corrosion and expansion.; Finally the façade is made good, low disturbance restoration complete..