People spend thousands trying to cure this problem β Damp chimney!
Summary
Damp chimneys are a persistent issue β Many people struggle with moisture in their chimneys even after spending significant money on repairs.
Old fireplaces helped keep chimneys dry β In the past, fires burned daily, preventing moisture build-up. When fireplaces were sealed, problems damp chimney related issues arose.
Ventilation is crucial but tricky β Air bricks are recommended to maintain airflow, but warm indoor air can carry moisture into the chimney.
Condensation forms in cold spots β Moist air rising in the chimney condenses when it hits the cold bricks above the roofline, causing damp patches.
Misdiagnosis leads to unnecessary repairs β Many homeowners spend money on flashing, repointing, or capping without solving the underlying issue.
Moisture inside the house contributes β High indoor humidity (up to 60%) can exacerbate chimney dampness, leading to persistent problems.
Simple humidity checks can help β Using inexpensive humidity sensors can identify if excessive moisture in the house is a contributing factor.
Solutions before major repairs β Reduce indoor humidity using dehumidifiers, extractor fans, or increased ventilation before making structural changes.
Chimney sweeping and reconfiguring ventilation β Removing built-up soot and salts can help, along with placing air bricks in external walls rather than inside the house.
Avoid warm indoor air ventilating the chimney β This can worsen condensation, making the problem harder to fix.
Insights Based on Numbers
Β£1,000 β Estimated cost of replacing chimney flashing, which may not solve the issue.
60%+ humidity β If indoor humidity is above this level, condensation-related dampness becomes more likely.
Β£5-Β£20 β Cost of humidity sensors, an inexpensive way to diagnose moisture problems before making expensive repairs.
4 Roofers Couldnβt Solve This Damp Chimney!