Copper that leaves our shop is bright and reddish, the colour of a new penny. Customers sometimes ask how to keep it that way. The honest answer is that outdoors, you mostly cannot, and after a year or two you will not want to.
The first months
Exposed to air and rain, the surface of the copper oxidises and darkens. Within weeks it loses its shine; within months it is a warm brown, the colour most people picture when they think of a copper roof or gutter. The change is uneven at first, following where water runs and where the sun hits, and evens out over time.
The patina
Over years, and faster in damp or coastal climates, the brown turns to the green-blue patina copper is famous for. In the dry parts of Texas this can take a long time; in the northern states it comes sooner. The patina is a stable layer that protects the metal underneath, which is why copper roofs and gutters last for generations without paint or coatings.
Can you stop it?
Clear coatings slow the change but do not stop it, and they wear unevenly, so the copper weathers in patches when the coating fails. We do not coat gutters for that reason. If you want the bright look on a small decorative piece, ask us; on a gutter run we recommend letting the copper do what copper does.
Keeping it even
Because the colour follows the water, a gutter system weathers most evenly when it is made of copper all the way through: gutter, hangers, downspouts, brackets and guards. A steel bracket or an aluminium guard stays a different colour forever and can stain the copper below it. That is why every piece we sell, down to the brackets, is copper.
This article is general information about copper gutters and sheet metal work. It is not engineering, building-code or structural advice. Check local code requirements and your roofing contractor's recommendations before you order.
Materials are fabricated in Cleburne and shipped nationwide. Installation is a separate, local service for addresses near Cleburne, confirmed by ZIP code when you request a quote.
