Welcome to a blog on the conservation of architectural and archaeological heritage. This is primarily intended to provide resources and links for students on a series of lectures I give on various aspects of architectural conservation, research and analysis. The main topics over the next few months will be on research skills, survey, analysis and investigation, with some detailed information on weathering, soiling, cleaning, diagnosis, historic lime mortars, brick and stone deterioration.  Case studies and links to publications relevant to projects and issues in Ireland are provided at www.boltonconsultancy.com, and this blog will hopefully provide a useful resource to assist in your studies.