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Concrete or clay tiles – broken mortar under tiles

Crumbling mortar in masonry chimneys

  • Moisture getting into the mortar

    How to repair

  • Mortar quality is poor – most commonly found in pre-1930s buildings

    How to repair

Plaster finish cracking on masonry chimneys

Insecure chimney pot

  • Mortar deterioration between chimney and chimney pot

    How to repair