TL;DR
Brake metal is flat aluminum or steel coil stock that siding and window installers bend on a portable brake into custom trim profiles, used to wrap window frames, fascia, door surrounds, and other exposed wood in a weatherproof skin. The name comes from the bending tool, and the craft lies in crisp hems, kerfed corners, and laps that shed water downhill, since wraps that trap water rot the wood they were meant to protect.
What it means
Brake metal is flat aluminum or steel coil stock that siding and window installers bend on a portable brake into custom trim profiles, used to wrap window frames, fascia, door surrounds, and other exposed wood in a weatherproof skin. The name comes from the bending tool, and the craft lies in crisp hems, kerfed corners, and laps that shed water downhill, since wraps that trap water rot the wood they were meant to protect. Stock comes prefinished in standard siding colors, typically .019-inch aluminum for residential work. Neat work here is one of the fastest visual tells of a careful exterior crew.
Where it sits in the glossary
Brake metal is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
License: CC-BY-4.0 — quote freely with attribution to ProFix Editorial Team / ProFix Directory.