BCB is a French company which provides lime solutions such as mortars, washes or renders for exterior and interior masonry, and rendering for all types of architecture.
BCB is conducting research into eco-friendly materials by broadening the scope of application for lime. Within the ISOBIO project they have developed a novel bi-component product made of lime combined with hemp aggregates.
The novel plaster that has been developed can be used both for internal and external application. The plaster can be applied to old as well as new substrates, including concrete, cellular concrete, lime-based undercoating, stone, and wood panels. The product has also adheres well to bio-based substrates, such as the hemp panel developed by CAVAC. Implementation is made by spraying.
In case of external application, it should be covered with a fine layer of lime-sand render to protect the wall from weather conditions. When used internally, the plaster provides a decorative finishing layer. Because of its vapour permeability, it also ensures a comfortable habitat in term of humidity and temperature regulation.
The inclusion of bio‐based materials ensures that whole life energy use is reduced through taking advantage of the photosynthesis of atmospheric carbon, which is sequestered in the fabric of the building. The plaster does not contain sand, which also considerably reduces its carbon impact. Moreover, application of the plaster is easier due to its density being much lower than usual finishing plasters.