Remedial Treatment to listed buildings and period properties requires special consideration, as there are legal requirements and limitations on what work can or cannot be carried out and which materials may or may not be used. English Heritage (www.english-heritage.org.uk) has strict guidelines regarding the remedial treatment of listed buildings and this is enforced by the local Listed Building Inspector or Conservation Officer. It can be a criminal offence to carry out unauthorised works to a listed building without attending to the correct consultation procedures.
When carrying out works to a listed building, the objective should be to retain as much as possible of the historic fabric and halt further decay. To preserve the authenticity and historic value of the property, intervention should be kept to a minimum when containing the problem.