Colorado Outdoor EstatesRegistry
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← Performance atlas

Exterior system evidence record

Metals, finishes & corrosion

Material pairing, coating system, water retention, salts, fasteners, fabrication damage, and maintainability shape outdoor metal performance.

Exposure lensesExposure lensesThe conditions most likely to influence this material system's durability, detailing, or upkeep. They do not grade or approve a product.
  • Moisture
  • Deicing salts
  • Galvanic contact
  • UV
Plain-English terms used in this record
Assembly
The complete built system—not only the visible finish. It can include structure, backing, membranes, fasteners, joints, drainage, and adjacent materials.
Substrate
The surface or supporting material underneath the finish, coating, membrane, or adhered product.
Interface
The place where two materials, trades, or systems meet. These transitions often need explicit drainage, movement, and responsibility details.
Mockup
A small sample installation used to approve appearance, workmanship, joints, transitions, or performance before the full installation proceeds.

Research-supported principles

What this means for an owner.

  1. 01

    Dissimilar metals can create galvanic corrosion when electrical contact and an electrolyte are present.

  2. 02

    Edges, welds, cut surfaces, fasteners, and field damage often need more attention than broad factory-finished faces.

  3. 03

    Drainage, ventilation, coating repair access, and salt exposure should influence detailing and material pairing.

Project-team questions

Resolve before products are ordered or the work is covered.

  1. Which dissimilar metals touch, and how are they isolated?
  2. How are cut edges, welds, fasteners, and field damage treated?
  3. Can water and deicing residue collect in concealed or horizontal locations?

Federal evidence record

Open sources used

Source credit identifies the research record. It does not imply agency authorship, endorsement, product approval, or a parcel-specific conclusion.

FHWA · Corrosion protection resourcesNIST · Corrosion data and research

Verification boundary

What still belongs to the project team

Confirm the actual product, source, testing, exposure, substrate, fasteners, anchors, coatings, compatible adjoining materials, installation instructions, mockups, warranties, maintenance plan, jurisdictional requirements, and responsible licensed professionals. The Atlas is an evaluation framework—not a specification.

Read the Registry methodology →