Lime Conservation and Restoration
Richoak not only restore oak frames of period and listed buildings, we also restore and conserve lime plastering and rendering.
Lime has been traditionally used in the protection and decoration of buildings for thousands of years. Lime mortar is a type of mortar consisting of lime, water and an aggregate (sand). Lime mortar is a soft, porous substance ideal for use when working with softer construction materials, such as timber and natural stone.
Lime has many advantages over modern day cement. Lime mortar is considerably more “breathable”, wicking any dampness in the wall to the surface where it evaporates, leaving salt crystals from the water on the lime. This, therefore damages the lime, preserving the timber frame or masonry of the building itself. Whereas, with cement, the salt content from the water crystallises on the brick surfaces, as they are more porous than the cement. This causes the bricks to disintegrate, damaging the structural conformation of the building.
Lime is a much more resilient mortar than cement. Under cracking conditions, often caused by the movement and shrinkage of an oak frame over time, lime creates various micro cracks. These micro cracks re-crystallise, effectively healing the affected area. Under similar circumstances, cement breaks and cracks, resulting in higher reparation and maintenance costs.
We’ll oversee your renovation project from start to finish, from the surveying and planning processes, through to the overall competition of your building.