Architectural ACP / ACM for drained & ventilated fa?ades
Source aluminum composite rainscreen panels with the panel build, exterior coating, core option, dimensions and fabrication allowance needed for a ventilated ACP facade. DERACP helps fa?ade contractors, fabricators, distributors and project buyers define the sheet specification before quotation—while the final rainscreen subframe, cavity, WRB, fire-stopping and structural design remain project-engineered system decisions.
Rainscreen fundamentals
ACP rainscreen cladding uses aluminum composite material as the outer weather-facing layer of a wall assembly, with a cavity and secondary weather-control layers behind it. The outer panels shed most direct rain and create the architectural finish; the cavity, flashings and weather-resistant barrier manage residual moisture and support drainage and drying.
An aluminum composite rainscreen is not simply a “waterproof ACP wall.” It is a layered building-envelope approach. ACP or ACM panels form the exterior screen, while the designed cavity, WRB/air-water barrier, insulation, subframe, flashings and fire-stopping complete the wall strategy. For procurement, specify both the panel and the interface requirements that affect fabrication and attachment.
System responsibility: DERACP supplies aluminum composite panel material and can coordinate order-specific panel variables. Rainscreen engineering, subframe design, wind-load calculations, anchor selection, cavity dimensions, barriers, flashings and local-code compliance should be confirmed by the project architect, fa?ade consultant, engineer and installer.
Design logic
Searches for an “ACM rainscreen system” often combine three different decisions: the outer ACM panel, the joint/attachment concept and the complete wall assembly. Keeping these separate makes quotations more comparable and helps prevent a sheet specification from being mistaken for system certification.
Visible reveals are left open or detailed with baffles/splines rather than relying on exposed face sealant. Panel returns, rail geometry, cavity drainage and pressure behavior must be coordinated with the selected proprietary or engineered attachment approach.
The system accepts that limited water may pass the outer screen and provides a drainage and ventilation path behind the cladding. This approach makes WRB continuity, base drainage, head/sill flashing and penetration details especially important.
Wet-seal or barrier-style ACM assemblies use sealants and backer materials at joints. They can create a different visual and weathering strategy, but should not be described as equivalent to an open-joint rainscreen without matching system evidence.
RFQ-ready material definition
A useful rainscreen quotation goes beyond “4 mm exterior ACP.” Define the exact panel construction, appearance and fabrication context so the proposed sheet can be checked against the cassette design, module size, core requirement and destination-market documentation.
| Specification item | Practical project direction | What to state in the inquiry |
|---|---|---|
| Total panel thickness | 4 mm is a common architectural reference for ACM cladding; other builds may be reviewed. | Required total thickness, cassette depth/fold allowance and compatibility with the intended attachment concept. |
| Face / rear aluminum skin | Architectural fa?ades often discuss heavier skins than signage-grade sheets; 0.50 mm skins are a common specification reference. | State front and back aluminum thickness separately rather than assuming total panel thickness defines skin gauge. |
| Core construction | PE, FR/mineral-modified or higher-mineral A2-oriented constructions may be available by project. | Required fire classification, test method, exact report scope and whether project approval is panel-level or assembly-level. |
| Exterior coating | PVDF is commonly reviewed for exposed exterior fa?ades; project-specific coating systems may vary. | Exposure, city/climate, color, gloss, metallic direction, warranty basis if required, cleaning and expected lifecycle. |
| Sheet dimensions | Standard and project dimensions can be evaluated against production and logistics limits. | Finished sheet size, cassette/module layout, routing allowance, nesting yield, pallet constraints and unloading method. |
| Fabrication format | Flat sheet, route-and-return cassette blanks or buyer-fabricated sheets require different allowances. | Who fabricates, route depth, return dimension, corner detail, stiffener concept, hole/slot requirements and tolerances. |
| Joint appearance | Open reveal, dry-joint spline, face-fastened or sealed-joint concepts affect cassette geometry and visible edges. | Joint width, shadow line, exposed/concealed fastener requirement, color of reveals and system supplier/detail reference. |
| Protective film & packing | Fa?ade finishes need clean face protection through fabrication and shipment. | Film direction/printing, removal timing, pallet ID, mixed sizes/colors, edge protection and destination handling. |
Reference values above are procurement starting points, not universal compliance claims. Final thickness, skin gauge, fire classification, coating, module size and test evidence must match the exact project and approved construction.
Fire & fa?ade compliance
Because rainscreen fa?ades include a cavity, fire safety cannot be reduced to the appearance of the panel or a generic “fireproof ACP” label. The panel core, insulation, cavity barriers, membranes, subframe, joints and complete wall configuration can all affect the project’s compliance route.
If the project specifies an EN 13501-1 class such as A2-s1,d0, require the report identity and verify the ordered panel build—core, total thickness, skins and coating—against the tested construction.
Some markets and building types require evidence for the complete exterior wall assembly rather than the panel alone. In North America, project teams may reference assembly-level routes such as NFPA 285 where applicable.
Standards such as AAMA 508 or AAMA 509 can relate to rainscreen system behavior. They should not be represented as a certification of an unfabricated ACP sheet unless the exact tested system and scope support that statement.
Cassette fabrication & interfaces
The sheet needs to arrive with enough information for routing, folding, corner assembly and attachment. Coordination is especially important when fa?ade modules repeat over hundreds or thousands of square metres.
Exterior surface
For an exposed ventilated ACP facade, surface selection should be connected to UV, rain, humidity, pollution, coastal air, cleaning frequency and the appearance expected across the full elevation. PVDF-coated aluminum composite panel is a common exterior direction because the coating is selected for stronger weathering performance than typical interior PE finishes.
Color should be approved as a physical production reference whenever appearance is critical. Metallic and directional finishes also need an elevation orientation plan so adjacent cassettes do not appear inconsistent after installation.
DERACP website product images
The images below are hosted on www.der-acp.com and are used as product or application references. They do not represent a certification of a specific rainscreen system.
Where the material is used
Office, retail, mixed-use and hospitality elevations where modular joints, color control and lightweight panel fabrication are important to the architectural concept.
Airports, stations, education, healthcare and civic projects where procurement often requires defined fire documentation, durable exterior finishes and traceable product submittals.
Existing-building fa?ade upgrades where the project team evaluates substrate condition, new insulation, bracket stand-off, drainage, fire strategy and interface with existing openings.
Entrances, canopies, parapets, columns and geometric accents using cassette folding, clean reveals and coordinated transitions to glass or solid aluminum.
Projects that repeat a controlled sheet, cassette and color schedule across multiple elevations and benefit from size planning and pallet identification.
Stock or project-specific ACP supply where consistent skins, core, coating, width, length, film and packaging support local CNC fabrication and installation.
Supply strategy
DERACP’s role is most useful when the panel material is treated as a controlled project component rather than a generic commodity sheet. Send the wall concept and cassette requirements early enough for the material specification, finish, dimensions and documentation to be reviewed together.
Define use, panel thickness, face/rear skins, core, coating, finish, sheet size, fabrication route and required documents before comparing quotations.
Use an identified physical sample for appearance-sensitive fa?ade colors and record direction, gloss and finish references before bulk production.
Coordinate sheet width and length with cassette nesting, joint rhythm, routing allowance, pallet size, container loading and destination handling.
Keep the approved construction and appearance reference connected to the production order and agreed inspection points.
Plan batch, size and color labels; protective film; face/edge protection; pallet sequence and export packing around the installation workflow.
For staged projects or distributor programs, preserve product codes and approval references so reorder discussions start from the same technical baseline.
Faster quotation
Related DERACP resources
Use these DERACP pages to confirm fire-core direction, exterior coating, panel dimensions and technical data before issuing the final RFQ.
Buyer FAQ
Rainscreen cladding describes the wall strategy, not only the panel. ACP forms the outer screen, while a cavity and secondary weather-control layers behind it manage drainage, ventilation or pressure behavior according to the engineered design. Ordinary ACP wall cladding may also use sealed joints or other attachment concepts that are not rainscreen systems.
The outer ACP layer is intended to shed most direct rain, but a rainscreen should not be described as relying on the panel face alone for waterproofing. The WRB/air-water barrier, flashings, cavity drainage and opening details are critical parts of moisture management. The exact system should be designed and tested for the project.
4 mm ACM is a common architectural reference, but the correct panel build depends on aluminum skin thickness, cassette size, support spacing, wind pressure, fabrication method, core requirement and the chosen attachment system. State the complete panel construction in the RFQ rather than total thickness alone.
PVDF is commonly selected for exposed exterior fa?ades because it is intended for stronger weathering performance than typical interior PE coatings. Final coating selection should consider UV, coastal or industrial exposure, humidity, pollution, color, cleaning, gloss and the project’s specified performance requirements.
Project-specific A2-oriented or FR/mineral-modified core options can be discussed, but the required classification and report must match the exact ordered construction. Fire compliance may also depend on the complete wall assembly, including insulation, cavity barriers, membranes and substructure.
Send the project location, building/application, panel thickness, front/rear aluminum skins, core/fire requirement, coating, color, sheet sizes, quantities, cassette or fabrication drawing, joint/attachment-system reference, required test documents, destination and packing requirements. DERACP can then quote the panel material against a clearer technical baseline.
Project quotation
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