Preservation of Stones

Preservation of stones is intended to protect the structure against the action of weathering agents and also to protect the good appearance of the face work. The durability of stones increases remarkably if the stones are properly preserved. Preservation is effected in the following ways:

1. Voids existing in the pores are filled properly.
2. Preservation of stones by coating with suitable oils like coal tar, linseed oil, etc.
3. Entry of moisture into the surface of the stones is to be avoided.
4. Stones with carbonate of lime should be discouraged from use in industrial towns.
5. Brick masonry with a combination of limestone and sandstone or magnesium limestone and granular limestone should not be laid close to each other.
6. Building materials which are inactive with stones should be used.
7. Growth of plants on the joints of stones should be prevented.