Introduction
Old houses have a unique charm, but they are also more prone to rising damp. Built with traditional materials and often without a damp-proof course, they can absorb moisture from the ground more easily. Recognising the specific challenges in older properties helps to understand why damp appears and what options exist today.
Why old houses are vulnerable to rising damp
- No damp-proof barrier → many older buildings were constructed before damp-proof courses were standard.
- Porous materials → stone, brick, and lime mortars absorb and retain water.
- Previous repairs → the use of non-breathable paints or plasters may have trapped moisture.
- Limited ventilation → thick walls and small openings slow down natural drying.
Signs of rising damp in old houses
- Dark stains at the base of walls.
- White, powdery salt deposits (efflorescence).
- Flaking or crumbling plaster.
- Persistent musty smell in rarely used rooms.
Consequences over time
- Damage to original materials and finishes.
- Loss of comfort due to cold and damp interiors.
- Reduced property value if visible during sale.
Traditional approaches
- Chemical injections → attempt to create a barrier inside the wall.
- Wall cutting → very invasive and rarely suitable for historic buildings.
- Breathable plasters → help manage symptoms but do not stop rising damp.
Modern non-invasive solutions
Today, technologies exist that aim to reduce rising damp without altering the structure of old houses:
- ATE (electronic systems) → use electronic impulses to influence moisture movement in walls.
- ATG (geomagnetic systems) → use natural geomagnetic fields, require no electricity or maintenance.
These devices are discreet and non-invasive, making them particularly compatible with heritage or listed buildings.
Conclusion
Old houses are more likely to suffer from rising damp due to their construction methods and materials. Traditional treatments often involve invasive work, which is not always suitable for historic properties. Modern systems such as ATE and ATG devices offer alternatives designed to act against rising damp while respecting the integrity of older buildings.