Impact of Materials on Conservation of the Built Environment: Case Study of Historic Mosques in Mosul Old City

Conservation of the built environment through reusing historic buildings maximizes the use of existing materials. the research question is how to retain the integrity of historic mosques through using sustainable material? the main purpose of this study is to investigate the impact of materials on conservation of historic mosques in old mosul city with sustaining the integrity of the mosques. the study applies qualitative method of analysis. the method of collecting data is by making direct observation. the techniques for collecting data are by writing descriptions and making an inventory of the variety and arrangement of the materials used in the historic mosques. the research uses open coding to analyse the data by identification of emerging themes from the raw data. the goal is to create descriptive and multi-dimensional categories and build a conceptual model from the categories, which are grouped. this study highlights the themes of materials used in historic mosques in mosul old city and show that the integrity of mosques affected by the materials, which were used in these mosques. the research showed that the elements that the damages occurred in as a result of the use of inadequate materials which used in such elements. the research recommends that experience is vital in conversation of the historical buildings and require to performed identification, evaluation, registration and treatment activities. in some cases, additional areas or levels of expertise may be needed, depending on the complexity of the task and the nature of the historic building involved