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Exterior system evidence record

Architectural concrete

Durability begins with exposure classification, mixture design, consolidation, curing, drainage, joints, and protection—not the final color or texture.

Exposure lensesExposure lensesThe conditions most likely to influence this material system's durability, detailing, or upkeep. They do not grade or approve a product.
  • Freeze–thaw
  • Deicing salts
  • Moisture
  • Thermal movement
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

    Freeze–thaw durability depends on the complete concrete system, including air-void structure and saturation exposure.

  2. 02

    Deicing chemicals can intensify scaling and corrosion risks when water and chlorides reach vulnerable concrete and reinforcement.

  3. 03

    Curing, joint planning, drainage, and placement conditions materially influence service life and appearance.

Project-team questions

Resolve before products are ordered or the work is covered.

  1. What exposure conditions govern the mixture and reinforcement protection?
  2. How will water leave steps, walls, copings, decks, and equipment pads?
  3. Where are cracking, movement, color variation, and mockup acceptance addressed?

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.

Federal Highway Administration · Concrete durabilityNIST · Cement and concrete 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 →