Decorative scoring The deliberate pattern of lines hand-grooved or cut into a concrete sidewalk to replicate historic stone flag layouts.
When the LPC permits concrete to replace damaged stone in historic districts, they typically mandate a custom scoring pattern to maintain the classic visual layout. Contractors must tool or saw-cut these joints to specific depths and grid patterns (such as traditional 5-foot by 5-foot squares) to match neighboring properties. Proper decorative scoring not only satisfies landmark design rules but also creates neat control joints that dictate where the concrete will crack as it cures, extending the pavement's life.
Frequently Asked Questions About Decorative scoring
What is decorative scoring?
A deliberate pattern of grooves cut or tooled into concrete to replicate the layout of historic stone flags.
When is it required?
Typically when LPC permits concrete to replace damaged stone in a historic district, to preserve the visual rhythm of the streetscape.
How is the pattern determined?
By matching neighboring properties and any applicable district Master Plan, commonly on a traditional grid such as five-foot squares.
Does scoring serve a technical purpose too?
Yes. Properly cut scoring acts as control joints, directing shrinkage cracking to the grooves instead of across the surface.