Tyrone Genealogy. Parish Co.Tyrone. National Archives Ireland. Strabane HistorySociety. History Publications 1991-2003 - Old Strabane Web. ProjectBook Conservation. Dampness in Traditional Buildings by Paul Watts With the introduction of cavity walls, cement, plastic paints and DPCs, it was mistakenly thought that sealing a building was essential for modern living in traditionally built structures. In most cases, sealing an old building is the last thing that it needs. The resultant build up of moisture feeds fungal growth, rot, cold walls, higher heating bills and even structural damage. Read Article Categories: Damp, Sustainability, Maintenance, Restoration, Listed Buildings, Building Conservation, Property.