Lime & Plaster
Period properties were originally built from the inside out using breathable materials so the whole structure was designed to be naturally permeable. At Dunne and co we advocate traditional breathable construction techniques and materials to prevent long term damage and retain the historical integrity of the building.
Modern building materials are totally impermeable to water ingress and using waterproof materials and modern techniques during repair of a period property can lead to further problems in the long run. For example concrete render will prevent water evaporation from the outside of the building, effectively sealing damp inside and encouraging decay within the structure.