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Defective tesserae applied to a concrete parapet. Both the background render as well as the tile finish have failed, possibly as a result of lack of key and water ingress via the parapet capping. |
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Severe spalling of glazed finish to porous body glazed brickwork. The pattern of spalling suggests expansive forces, possibly frost or crypto efflorescence behind the glaze. Note white staining in centre of photograph. |
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This panel of tesserae was repaired about 10 years before this photograph was taken. Vacuum grouting was used to secure the background render to the concrete substrate. The repair appears to be performing satisfactorily. |
