The tie will restrain the masonry against lateral wind loads but the sleeve will allow the masonry to expand or contract. Debonding sleeves should be installed with a 10mm gap at the end to allow for expansion of the masonry. The tie will restrain the masonry against lateral wind loads but the sleeve will allow the masonry to expand or contract. Debonding sleeves should be installed with a 10mm gap at the end to allow for expansion of the masonry.