There are key differences between traditional and modern construction methods to consider when carrying out repairs. Traditional buildings often need specialist knowledge, skills and materials to ensure they continue to function properly. However, it is all too common for unsuitable modern methods to be used, which can cause long-term damage and affect the historic character of the building. The main differences are outlined below.
Traditional Tenement
Modern Construction
Breathable building fabric allows moisture to be absorbed and evaporated.
Sealed external envelope traps moisture, preventing it from evaporating easily.
Thick walls, usually stone, with lime mortar and voids that absorb and release water during drying periods.
Slender walls with barriers and cavities to prevent water penetration.
Good ventilation via voids in walls, floors, and chimneys reduces dampness.
Construction is largely sealed, relying on trickle vents in windows for limited airflow.
Typically low levels of insulation.
High insulation standards, improving energy efficiency and reducing heat loss.
May not have a damp-proof course, although many buildings have a basic system, often made from a layer of slate.
Uses advanced synthetic damp-proof membranes to block moisture transfer from the ground.