Buildings rely on the use of materials that are sympathetic to their technical and/or aesthetic characteristics. Research the existing knowledge of the historic origins of materials and develop an understanding of the effect of repair, replacement and additions to these materials including appropriate methods of construction. Understand the performance of the existing materials within the construction with regards to heat and moisture. Understand how the existing fabric behaves in relationship with the general room conditions and how its performance may be altered by the addition of different materials. For example, a fabric element might rely upon a hygroscopic finish to allow evaporation of internally generated vapour and reduce vapour diffusion through the element.

Specify materials that retain the existing fabric conditions/qualities in relation with the room and external environment with regards to moisture behaviour.

Monitor any changes to fabric materials qualities. For higher risk levels, carry out continuous physical testing conditions within fabric and reporting of results is suggested. As a minimum, carry out occasional visual inspections to check for condensation/mould growth in risk areas. Develop a response and mitigation strategy in place if adverse conditions arise