Compaspan ™

Aluminum Composite “Rainscreen” Wall Cladding System


Compaspan™ by SpandrelTech Ltd. aluminum composite “rainscreen” wall cladding system comprises of a highly formable panel and an extruded aluminum vented subframe assembly. Panel corners are reinforced on the interior.

The panels are rout and return, pan formed and lightweight, consisting of a nominal 0.5 mm (0.020”) thickness aluminum skin on each side of a Polyethylene (PE) or Fire Rated (FR) core of nominal 3 mm (0.118”) thickness. The resulting panel is a nominal 4 mm (0.156”) thickness protected by a protective polymer release liner (strippable film) that is removed after installation.

The “snap-in” attachment system in concert with traditional screw fastening reduces installation time (and cost) substantially. The aluminum subframe attachment extrusions are designed to allow for expansion and contraction (thermal movement) within the “rainscreen” wall. Panel bottoms have oblong weep holes and the panels use open cell foam to facilitate evaporation and drainage of any moisture entering the system.
Designers typically specify a Compaspan™ dry-seal or wet-seal system as required. Dry-seal is recommended for installations having a good air/vapour substrate (no caulking reduces costs). Wet-seal is recommended where the substrate is more vulnerable to moisture intrusion


The design of pressure equalized “rainscreen” curtain wall assemblies using Aluminum Composite Metal Panels (ACMP) – a dominant trend – has changed considerably over the years. Wall assemblies built according to the “rainscreen principle” consist of a cladding, a vented air space, and a metal subframe attachment system, with the curtain wall or load-bearing wall underneath.

SpandrelTech creates stronger, longer lasting, aesthetically superior cladding systems that feature design-unit integrity utilizing improved methods of adhesion between the ACMP and the fastening system while meeting or exceeding the most demanding specifications. A better panel system is also easier to install.

Attachment of the cladding to the protected wall traditionally employs an all-screw-fastened metal framing system. SpandrelTech – with Compaspan™ – improves the installation process with a trademarked “snap-in” fastening system that secures the panels to the subframe, yielding better quality installations at reduced cost.

Realizing the Most Imaginative Building Designs


· Commercial, industrial and institutional
· Exterior wall cladding
· Beam and column covers
· Fascias and canopies
· Soffits
· Trim and accents
· Interior wall panels
· Straight or curved applications

Fabrication Capabilities

  • Brake Forming, up to 3.6 m (12’-0”) lengths
  • Shearing, up to 3.6 m (12’-0”) lengths
  • Hole Punching
  • Notching
  • Rolling, up to 3 m (10’-0”) lengths

Dimensional Criteria

Typical maximum panel height is 1524 mm (60”) with up to 1575 mm (62”) available. Maximum panel length is 4978 mm (196”). Panel depth is overall 51 mm (2”). Most manufacturers make their ACM available in 3 mm, 4 mm, 6 mm (0.118”, 0.156”, 0.234”) thickness.

Structured Incremental Shipping

If required, we will coordinate manufacturing and shipping panels on a floor-by-floor or elevation-by-elevation basis for installation convenience.

Options & Finishes

  • 3 mm, 4 mm, 6 mm (0.118”, 0.156”, 0.234”) thickness composite panel is available on request.
  • Choice of Polyethylene core (PE) or Fire Rated (FR) core. FR core is typically specified in accordance with building code requirements.

PPG or Valspar paint coatings are as provided by Aluminum Composite Metal Panel (ACMP) suppliers based on their standard colour charts (available from SpandrelTech Ltd.) Custom colours can also be provided upon request.


There are no limitations on the use of Compaspan™ by SpandrelTech Ltd. other than load and allowance deflection limits. Panels are non-load bearing. All load/height applications are to be designed and approved to accommodate customer’s requirements as specified by a professional engineer.

Standards Conformance

Aluminum conforms to;

  1. AAMA 2605-05 Voluntary Specification, Performance Requirements and Test Procedures for Superior Performing Organic Coatings on Aluminum Extrusions and Panels.
  2. AADAF 45-09 Designation System for Aluminum Finishes.
  3. ASTM B209 Standard Specification for Aluminum and Aluminum Alloy Sheet and Plate 2010.