Design & Specification

Design & Specification Guides

Technical guidance for specifying metal wall panels: cost factors, installation, finishes, corrosion, oil canning and fire performance considerations.

Finished modular metal facade used to introduce specification topics.
Specification has to name installation, finish, fire assembly, and cost together.

Direct answer

Design and specification guides turn a metal preference into a buildable note. They cover cost factors, installation, finishes, corrosion, oil canning and fire as an assembly. General material behaviour, product data and engineer- or code-confirmed items are kept apart on purpose.

Key takeaways

  • Write the assembly, not only the visible metal.
  • Cost is labour, access and custom work as much as coil price.
  • Oil canning is a design risk on flat glossy fields, not a defect slogan.
  • Never specify that metal panels are fireproof.

These guides turn a material preference into a buildable specification: how a panel is priced, installed, and expected to perform, not only how it looks. The parent map is the metal wall coverings guide. The readers are architects, specifiers, and contractors.

Architectural metal panel finish samples in several colors.
Finish class and exposure decide more warranties than the metal name alone.

These pages distinguish three layers on purpose: general material behaviour, product-specific properties, and matters that require an engineer or local code review. The Whole Building Design Guide metal panel wall systems article is useful because it keeps the wall in that larger unit.

The six guides

Metal cladding cost: why the installed number moves with gauge, finish, system type, access equipment and labour. It will not issue a quote and it will not publish city price lists.

Metal wall panel installation: substrates, clips, flashings and sequence. A correct metal on the wrong substrate is still a failed wall.

Metal panel finishes: PVDF, powder coating, anodizing and living patinas. Finish class belongs in the specification. A sample chip is not a coating system.

Metal cladding corrosion: galvanic couples, coastal salt, cut edges and wet cavities. Isolation and drainage are design items.

Oil canning: the visible waviness of flat metal. Width, stiffening, gloss and expectation management reduce it. It is usually a visual issue, not a structural one.

Metal wall panel fire performance: the page that exists so no other page has to overclaim. Skin, core, insulation, cavity and attachments are listed separately. Metal panels are not fireproof.

How these pages should be used with materials and systems

Read materials for the metal and systems for the format, then use this hub to write the limits that those pages cannot honestly quantify.

A Metal Composite Material fire note belongs here and on the system page, not as a one-line claim on a colour sheet. An insulated-panel thermal value belongs to that sandwich, not to a single-skin cassette. A zinc ventilation note belongs on the zinc page and in the installation package.

What belongs in the written specification

At minimum, a metal wall note should name the metal, the panel format, the drainage strategy, the coating or patina class, compatible fixings, movement joints, and the listed assembly for fire and wind where the occupancy requires it. If those lines are missing, the drawing is still a rendering.

Applications tell you whether that note is for a weather wall, an interior liner, a commercial elevation or a house. Do not enlarge a residential accent note into a civic envelope.

How to use this hub

  1. Keep the four-question order from the metal wall coverings guide.
  2. Open the one technical guide that matches the argument in the meeting.
  3. Bring the manufacturer listing and the authority having jurisdiction into the items this site marks as assembly-specific.
  4. Use the comparisons hub only after the specification limits are named.
What each technical guide is for
GuideUse it whenIt will not do
CostThe bid argument is panel price onlyIssue a quote
InstallationJoints and sequence are vagueReplace shop drawings
FinishesColour is the whole specGuarantee a 20-year film
CorrosionMetals and salt meetPick an alloy from a photo
Oil canningThe elevation is flat and darkPromise a mirror-flat wall
FireSomeone called the metal safeCall panels fireproof

In this cluster

Guides

Large commercial metal facade whose installed cost is more than panel price.

Design & Specification

Metal Cladding Cost Factors

What actually drives metal cladding cost: metal, gauge, finish, system type, access and labour, not only the panel price on a quote.

Vertical metal wall used to introduce assembly-level fire performance.

Design & Specification

Metal Wall Panel Fire Performance

Why metal wall panel fire performance is an assembly claim, and how skins, cores, insulation and cavities must be specified without calling panels fireproof.

Metal panel joint and clip detail on a facade assembly.

Design & Specification

Metal Wall Panel Installation

How metal wall panel installation sequencing, substrates, clips and flashings decide whether a specified system actually weathers and stays flat.

Ribbed metal wall panels where reflection and flatness are judged.

Design & Specification

Oil Canning in Metal Panels

What oil canning is on metal wall panels, why it is usually a visual issue, and which design choices reduce waviness on flat glossy elevations.

Frequently asked questions

Who confirms fire and structural numbers?

The manufacturer’s listed assembly and the authority having jurisdiction, often with an engineer. These guides explain what to ask for. They are not a substitute for that confirmation.

Why separate general behaviour from product data?

Because a metal can be generally corrosion-tolerant while a specific coating, core or fastener package is not. Mixing those layers is how brochure language enters a specification.

Are these pages installation manuals?

No. They name the decisions that belong in the specification. Field sequence still follows the approved shop drawings and the system instructions.

Sources

  1. Metal Panel Wall Systems — Whole Building Design Guide Accessed August 20, 2026.
  2. Metal Composite Material — Metal Construction Association Accessed August 20, 2026.