We are using a cork based NHL 5 lime plaster on a renovation project at the moment. The photo shows the mesh reinforced base coat as it dries out for the finish coats. The end result looks a bit like white plaster. The product, Diathonite thermoactive .37, is applied onto the solid brickwork external walls and as it is vapour permeable and thermally insulating, avoids the risk of thermal bridging, condensation, and mould growth as well as improving internal comfort. K value is 0.037W/mK. Ideal for the technical challenges of updating solid masonry walls.