kalkkalaastia
Kalkkalaastia is a lime-based plaster used in traditional Finnish and Nordic building practice. It is typically made from a lime binder (lime putty or hydraulic lime) mixed with aggregates such as sand, and it may include pozzolanic additives to influence setting and durability.
The plaster is usually applied in successive coats, including a scratch coat to provide a key, a
Historically widespread in Europe before the widespread use of cement-based plasters, kalkkalaastia remains important in heritage
Maintenance and repairs should use lime-based plasters to ensure compatibility with older walls. Cement-based patches can