What should be done to avoid sagging of the chimney chase?

To prevent sagging of the chimney chase, insulating and adequately securing it is essential. Proper insulation helps to maintain the temperature within the chase, reducing the risk of condensation and potential moisture damage, which can lead to sagging over time. Additionally, securing the chase ensures that it remains firmly in place, supporting its structural integrity and preventing any shifting or settling that could cause sagging. By addressing both insulation and securement, the chimney chase can maintain its shape and function effectively, preventing issues that arise from environmental stresses or heat fluctuations.