Glossary
Scupper
An opening in a parapet wall or roof edge that allows water to drain off the roof, either directly or into a downspout — often the overflow protection required by code.
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Plain-English definition
A scupper is a hole in the wall at the roof edge that lets water out. Some are primary drainage; many are overflow protection that only works when the main drains clog — which is exactly when you need them.
Why it matters to you
Placeholder: overflow scupper code requirements, the blocked-scupper failure pattern, and what inspectors check.