Rather than replace a whole stone or sill, restoration masons cut out the damaged section to a clean geometric shape and fit a matching piece of new material into it, set in mortar or adhesive and often pinned. A well-made dutchman blends into the original. The term is also used by carpenters and metalworkers for similar inset repairs.
Corner of that limestone sill is gone, cut it square and set a dutchman, no need to pull the whole sill.
Also heard as
- dutchman repair
- inset repair
Related terms
Spalling
Concrete, brick or stone breaking off in flakes or chunks at the surface.
Repointing
Raking out deteriorated mortar joints in masonry and refilling them with new mortar.
Tuckpointing
Common trade name for repointing brick, though strictly it is a decorative technique with a contrasting thin joint line.
Substrate failure
The joint face itself breaking, so sealant comes away with a skin of concrete, coating or EIFS still attached.