This gives you an understanding of how a damp survey that is carried out by us on this Grade 2 Listed building. Aerial photos play a massive part in our surveys, along with CCTV inspection of drains. Damp investigations following the methodology in BRE DIGEST 245 (gravimetric analysis). Have you seen the joint damp surveying methodology from Historic England, Spab, and the PCA?https://www.completepreservation.co.uk/2020/01/07/rics/