Report No. 1

Summary

This report is a description of lime rendering, lime wash and the intensive course Lime Rendering in Visby, Sweden, which was attended by students from Gotland University in Sweden, University of Applied Sciences Novia in Finland and Estonian Academy of Arts in Estonia during a mild week in September of 2009. This was the first intensive course within the joint project Sustainable Heritage, which is financed by the Nordic Council through Nordplus stipends.

While rendering old buildings it is important to choose such new materials that work together with the original surface and structure. It is always safer to use soft materials, like pure lime renders, but this puts higher demands on the workmanship. In new buildings, mixtures of lime and cement might be the best solution.

Both cement and lime have good and less good qualities and they work in different ways. This is why more research is needed and information must be spread so that we can profit from the best qualities in each of them. The report deals with the subject from the point of building physics as well as from a practical perspective.