Preservation Works Ltd. is a historically appropriate masonry restoration company that specializes in the repair of lime mortar buildings. We are producing a series of videos to visually explain the way lime mortar repointing is done and why it should be done (and why it costs a bit more to do the repair correctly the first time). Lime mortar is the material used in traditional building before the invention on Portland cement and the modern building industry. Buildings originally built with lime mortar should be repaired with lime mortar.