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Calcium silicate brickwork. The darker areas are where crack repairs have been undertaken.

Rat trap brickwork. Image showing the bonding bricks where these pass through the cavity.

Flos tectorii and liesegang pattern weathering to mortar.

Poor quality brickwork. The strength and durability of this wall is uncertain.

Efflorescence to brickwork. The salts were drawn out due to leaking rainwater goods.