TDT Preservation is a South West based timber and damp proofing company proud of its good reputation.TDT offer a wide range of specialist services which includes all forms of damp control, eradication of woodworm, wood rots and resin repairs.TDT are a local company, proud of its good reputation. We are large enough to cope but small enough to care.The Company was formed in 1967 and has carried out a variety of large and small contracts in the South West and other areas.