Construction mockup guide: types, approval, and disposition

What types of construction mockups are there?

Construction mockups fall into three categories: visual mockups (appearance approval), field mockups (full-size assembly built on the project), and performance mockups (tested for water, air, and structural performance, usually in an independent testing lab). The specifications in Section 01 43 00 (Quality Requirements) define which are required, what they cover, and what gets approved before proceeding.

What is a visual mockup?

Visual mockups (also called appearance or range mockups) approve color, texture, and craftsmanship for a material. Common examples:

• Brick range panels showing color and blend (typically 4'×4' minimum, three panels for blend approval)
• Stone and precast panels for color, texture, and finish
• Paint and stain color samples (typically 2'×2' on the actual substrate)
• Exposed concrete finish and board-formed textures
• Wood stain on millwork species

Approved mockup is photographed and retained on site as the reference for production installation.

What is a field mockup?

Field mockups are full-size assembly mockups built on the project site, typically in an inconspicuous location or on an expendable portion of the building. Common examples:

• Typical unit mockup (multifamily): full unit built to finish, then opened for review
• Bathroom mockup: complete bathroom with finishes, fixtures, trim, and tile work
• Classroom or patient room mockup (institutional)
• Typical office floor tenant build mockup
• Structural steel connection mockup

The mockup goes through the same subcontractor handoffs as the production work, every trade that touches a finished unit also touches the mockup. Used for quality, coordination, and training.

What is a performance mockup?

Performance mockups undergo testing to verify performance criteria. Most common on exterior wall assemblies:

• ASTM E283: Air infiltration through exterior walls
• ASTM E330 / AAMA 501: Structural performance under wind load
• AAMA 501.2: Field water penetration (pass/fail for a static water test)
• AAMA 501.1 / 501.3: Dynamic water penetration under wind pressure
• ASTM E547: Cyclic water penetration
• AAMA 501.4: Seismic movement and thermal cycling

Performance mockups are often built in a qualified testing lab. The mockup must include the real wall assembly with representative corner conditions, slab edges, and window and door penetrations. Related: curtainwall leaks.

How does the mockup approval process work?

The mockup approval process runs from shop drawings to field construction to owner and designer sign-off before the remaining work proceeds.

• Written acceptance criteria agreed before the mockup is built
• Mockup construction witnessed or inspected at key phases
• Post-completion walkthrough with owner, designer, and GC
• Formal punch list with closure deadline
• Written acceptance once punch list cleared
• Retention on site as reference until substantial completion

Photograph the approved mockup from all sides with date and signature block, this becomes the QA baseline for the production work.

What happens to a mockup after approval?

After approval a mockup is usually built into the work, demolished, or kept on site as the quality standard for the remaining work.

• If the mockup is on an acceptable final-work location, incorporate it
• If built as a standalone, demo and dispose at project end
• Performance mockups at labs remain property of the fabricator unless owner elects to purchase

This decision affects cost, retained mockups are cheaper than demo'd ones. The specification must state the disposition plan.