Removing cement render from older buildings
Existing cement finishes
Many older stone and cob buildings have been rendered in cement at some point in their history. This was often done to change appearance or as part of later repair work, rather than as part of the original construction.
Cement render is materially different from traditional lime finishes and behaves differently on older masonry.
Exposing the underlying masonry
Cement render can usually be removed from older buildings, provided the underlying stone or cob is suitable and in reasonable condition.
Removal allows the original masonry to be exposed and assessed. This makes it possible to understand how the wall has been constructed and how it has been behaving beneath the cement finish.
In some cases, the masonry is suitable to remain exposed and can be re-pointed using lime mortar. In others, the stonework is better protected with a lime render reapplied over the surface.
Condition and repair
During removal, the condition of the masonry and existing mortar joints is assessed. Where joints have weakened or stone has loosened, repairs are carried out using lime-based materials to maintain compatibility with the original construction.
The final approach is determined by the condition of the wall rather than a fixed visual outcome.