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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

Corrosion of cowl and/or flue pipe

Insecure flue

Chimney or flue flashing has lifted

External chimney separating from building

Flat top flashing to framed chimney

  • Not correctly installed or not correctly detailed originally 

    How to repair

No vent openings to top of framed chimneys/flues

Leak around fixings of TV aerials and satellite dishes

  • Sealing washers to fixings were left out at installation 

    How to repair

Gas supply – corroded flue