A perforated metal screen is a metal sheet - most often aluminum - punched or cut with a regular or decorative hole pattern, used as the panel element within facades, privacy barriers, sun shades, fences and interior partitions. GNEE supplies the perforated panel material and assists with custom panel specifications to drawing; we do not supply or install the finished screen system. Explore the materials, hole patterns, open area, finishes and what to include in a quote below.
Send Your Drawings for a Quote Request Perforated Panel Specifications
What Are Perforated Metal Screens?
A perforated metal screen is a flat metal panel with a uniform or designed array of holes. In architecture it is the infill or facing element of a larger system - fixed to a sub-frame or post - not a standalone structural assembly. Its function follows the hole pattern: control light, air, sightlines and appearance while keeping a rigid, lightweight panel.
How Perforated Metal Screens Are Made
The two common routes are press perforating (a tool punches round, square, slotted or hexagonal holes at high repeat rate) and laser or CNC cutting (custom-cut and decorative patterns, lower volume). Which fits a project depends on pattern complexity, volume and tolerance.
Perforated Screens vs. Expanded Metal and Wire Mesh
Perforated screen uses a solid sheet with punched holes, giving clean edges and controlled open area. Expanded metal is slit and stretched into a linked mesh (no offcuts, higher stiffness per weight). Wire mesh is woven or welded wire. They are not interchangeable: a precise open area and flat panel read differently from an expanded or woven product.
How Perforation Affects Light, Airflow and Visibility
More open area lets more daylight and air through and reduces the panel's visual weight; less screens more and cuts airflow. Viewing angle also matters - a pattern that looks closed face-on can read as open from a grazing angle. These follow the agreed hole size, pitch and layout, balanced against panel strength.
Common Architectural Applications of Perforated Metal Screens
Perforated screens are specified where a building needs a controllable mix of openness and screening. Each application sets different demands on material, pattern and open area.
Perforated Metal Screens for Building Facades
As a facade infill or rain-screen facing, the panel gives a building its texture and partially filters sun and air. Facade panels must hold flatness under wind and span between supports, so pattern, thickness, edge form and support spacing are specified together - not the hole pattern alone.
Perforated Metal Privacy Screens for Balconies and Outdoor Spaces
Balcony and terrace screens balance privacy from neighbours with retained light and breeze. A smaller open area increases screening; actual privacy also depends on viewing distance and angle.
Perforated Metal Sun Screens and Solar Shading
Mounted outside glazing, a perforated screen cuts direct gain while keeping outward views and daylight. The shading effect depends on orientation, time of day, panel stand-off and open area.
Perforated Metal Screens for Fences and Enclosures
For boundary fences and equipment yards, the screen must keep stiffness across a span and resist weather. Aluminum keeps the fence light and rust-resistant; coating choice follows the environment. Fixing method and post spacing are set by the installer's system.
Perforated Metal Screens for Interior Partitions
Inside, screens divide space while passing light and air and adding a designed surface. Interior use relaxes weather demands but still cares about edge finish, acoustic backing and panel-size consistency across a run.
Perforated Metal Screens for Equipment and Service Areas
Plant rooms, bin stores and service yards use perforated screens to hide equipment while allowing ventilation and access. The panel is a ventilated concealment element, supplied to size and pattern, with the surrounding frame and access doors built by the contractor.
Choosing the Right Metal for Architectural Screens
Aluminum Perforated Screens
Aluminum is light, naturally corrosion-resistant in air, easy to form and takes anodized, powder or PVDF finishes well. For screens it is the common first choice where weight and weather matter. Candidate alloys include 3003, 3005/3105, 5005 and 5052.
Stainless Steel Perforated Screens
Stainless 304 and 316 give higher strength and strong corrosion resistance, especially 316 in chloride-rich coastal or pool sites. The trade-off is weight and cost: stainless is roughly three times the weight of aluminum per square meter and costs more, so it suits aggressive environments or specifications that call for it.
Carbon Steel Perforated Screens
Carbon steel is the lowest-cost option and easy to fabricate; galvanizing or painting protects it. It is the heaviest of the four and needs maintenance once the coating is damaged, which fits industrial and budget-led enclosures where weight is not a concern.
Copper Perforated Screens
Copper is chosen for a living, oxidising patina and a premium architectural statement. It is heavier and more costly than aluminum and its appearance changes over time, so it is specified for design-led feature screens rather than volume facade use.
How to Select the Right Metal for Your Project
| Metal | Density (g/cm³) | Relative weight / m²* | Corrosion resistance | Indicative relative cost | Typical screen use |
|---|---|---|---|---|---|
| Aluminum (3003/5052) | 2.70 | 1.0× | Good in atmosphere | 1.0× (baseline) | Facades, privacy, sun shades |
| Stainless 304 | 7.93 | ~2.9× | High | ~2.5–3.5× | Coastal, hygienic, feature |
| Stainless 316 | 7.98 | ~3.0× | Very high (chloride) | ~3.5–5× | Pool, marine, aggressive |
| Carbon steel (galv.) | 7.85 | ~2.9× | Needs coating | ~0.6–0.9× | Industrial enclosures |
| Copper | 8.96 | ~3.3× | Good, patinas | ~4–6× | Design-led features |
*Relative weight per square meter at the same thickness; actual panel weight also depends on open area. Cost figures are indicative, market-dependent, not a quotation.
Perforation Patterns, Hole Sizes and Open Area
The pattern decides how the screen looks and performs. Buyers usually specify hole shape, hole size, pitch (center-to-center distance) and the resulting open area.
Common Perforation Patterns: Round, Square, Slotted and Hexagonal
Round holes in staggered or straight rows are the workhorse for facades and screens. Square holes give a crisper grid; slotted holes read as linear lines and suit sun shading; hexagonal patterns give even coverage. Decorative and custom patterns are cut rather than punched.
Hole Diameter and Pitch
Hole diameter sets the visual scale and the minimum opening; pitch sets how far holes sit and therefore the open area and the remaining web between holes. A tighter pitch raises open area but weakens the web, so the two are balanced with thickness and span.
How to Calculate the Open Area Ratio
For regular round holes, open area (OA, %) follows the hole diameter d and pitch p:
60° staggered layout: OA = 90.69 × (d² / p²)
90° straight layout: OA = 78.54 × (d² / p²)
Worked example: d = 10 mm, p = 15 mm, 60° staggered → OA = 90.69 × (100 / 225) = 90.69 × 0.444 = 40.3%. These formulas apply only to regular round holes in the stated arrangements; decorative, slotted or irregular patterns use a different (often drawing-based) open-area figure.
How Open Area Affects Privacy, Ventilation and Shading
Open area is the share of the panel that is hole. Lower open area screens more (privacy) but reduces airflow and daylight; higher open area does the opposite and removes load-bearing section. It is balanced against strength, span and the visual brief, and is not the same as acoustic absorption. See the open-area calculation guide for more.
Perforated Aluminum Sheet Open Area Calculation
Aluminum Alloy, Thickness and Panel Dimensions
Aluminum Alloys for Architectural Perforated Screens
Non-heat-treated 3xxx and 5xxx alloys cover most screens: 3003 and 3005/3105 for general and coated building panels, 5005 where a consistent anodized look is wanted, and 5052 where extra strength or corrosion resistance is specified. 6061-T6 is reserved for special engineering needs.
How to Specify Aluminum Sheet Thickness
Thickness alone does not set panel strength - panel size, open area, edge form, support spacing and wind load matter as much. Common architectural aluminum screen panels sit around 1.5–3.0 mm for stiffer facade and partition use; the exact value follows the project's support and loading conditions rather than a fixed rule.
Panel Width, Length and Custom Dimensions
Panels are supplied to project dimensions, with standard architectural references such as 1000–1500 mm widths and lengths to drawing.
Edge Margins, Folded Edges and Reinforcement
An unperforated edge margin keeps the panel stable and gives a fixing zone. Folded edges or a returned flange add stiffness and a safe edge; a stiffener or sub-frame behind carries span loads. These are designed with the installer's system, and GNEE supplies the panel processed to the agreed drawing.
Surface Finishes for Architectural Perforated Screens
Finish sets appearance, weather resistance and maintenance. The coating must also cover the cut hole edges for a consistent result.
Mill Finish
The natural rolled surface, used where coating is applied later or appearance is not critical. It is the lowest-cost option and the base for further finishing.
Anodized Aluminum
Anodizing grows a hard, integral oxide layer in a stable metallic tone (clear, champagne, bronze). It suits 5005 and similar; hole-edge appearance after perforating and forming is confirmed by sample before volume anodized production.
Powder Coated Aluminum
Electrostatic powder plus cure gives a durable, color-rich film in RAL colors, including double-side coating for exposed screens. Edge and hole coverage depend on the coating route; perforate-then-coat versus coat-then-perforate is confirmed per process.
PVDF Coated Aluminum
PVDF (fluoropolymer) coil or spray coating gives long-term color stability for exterior facades. It is specified where weather and UV exposure are severe and a long maintenance interval is wanted.
Brushed and Other Decorative Finishes
Brushed, satin or printed effects add a designed surface for feature screens. Feasibility and consistency at hole edges are confirmed against the sample and project finish spec.
Design and Installation Considerations
From the panel supplier's side, the points below are what must be agreed with the project's design and installation team.
Panel Fixing and Support Structures
The panel is fixed to a sub-frame, clip or post system supplied by the installer. GNEE supplies the panel with the agreed edge form and fixing holes or cutouts; the supporting structure and its connections are designed by the project engineer or system supplier.
Wind Load and Panel Stiffness
Exterior screens must meet the local wind load with adequate panel thickness, edge form, support spacing and fixings. The perforated panel alone is not a structural claim - wind load and span are verified by the project's structural design, not assumed from the sheet specification.
Drainage, Ventilation and Corrosion Considerations
Trapped water and dissimilar-metal contact drive corrosion. Aluminum next to stainless or carbon steel needs isolation; drainage and stand-off are designed into the system. Coastal and humid sites guide the alloy and coating choice.
Panel Joints, Tolerances and Installation Coordination
Joint width, panel-to-panel alignment and tolerances are agreed from the drawing so the installed screen reads as a continuous surface. GNEE confirms dimensions and tolerances against the agreed specification; final fit-up is the installer's scope.
Custom Perforated Aluminum Screens for Architectural Projects
Most architectural screens are made to a drawing rather than a stock size. Turning the technical knowledge above into a purchasable spec is the core of the inquiry.
Custom Hole Patterns and Panel Layouts
Standard round/square/slotted patterns or a custom decorative layout can be supplied to a pattern file or sample. Layout, margins and repeat are confirmed from the drawing so the pattern lands correctly at panel edges and joints.
Custom Alloy, Temper and Thickness
Alloy, temper and thickness are matched to the project's forming, finish and loading needs. GNEE confirms the available grades and the thickness range per inquiry.
Panel Cutting, Forming and Edge Requirements
Cut-to-size, folding, flanging and fixing-hole cutting are specified from the drawing. Available forming and tolerance limits are confirmed per order; the panel is supplied processed to the agreed edge and hole detail.
What to Include in a Perforated Screen RFQ
A useful inquiry lists: material, alloy/grade, thickness, panel size, hole pattern, hole size, pitch, target open area, finish, quantity, application and destination, plus the drawing. A drawing lets us confirm hole layout, edges and tolerances faster than a text spec alone.
Commercial Terms for Perforated Aluminum Screen Panels
GNEE supplies perforated aluminum screen panels on flexible terms. MOQ is flexible - small trial orders and large-volume, full-container or contract orders are both accepted, and larger orders are welcome. Lead time is 15–30 days. Each batch ships with an MTC to EN 10204 3.1 (3.2 and third-party inspection can be arranged). Pricing follows the SMM (Shanghai Metals Market) aluminum price and is quoted per order. We aim to reply within 24 hours.
Other Perforated Metal Materials Available
Although aluminum is a practical option for many architectural screen applications, some projects may require alternative metals based on their design, mechanical or environmental requirements. In addition to perforated aluminum sheets, we can assist with sourcing perforated stainless steel, carbon steel and copper sheets for project-specific requirements. Material grades, thicknesses, panel dimensions, finishes and processing options are subject to confirmation based on the project drawings and supply requirements.
Perforated Stainless Steel Sheets
304 and 316 stainless are sourced for high-corrosion or specification-led screens. Grades, thicknesses and finishes are confirmed per project; supply is arranged to the drawings rather than offered as in-house production.
Perforated Carbon Steel Sheets
Galvanized or painted carbon steel is sourced where budget and strength lead. Coating system and maintenance expectation are noted per environment; supply scope is confirmed per inquiry.
Perforated Copper Sheets
Copper is sourced for design-led feature screens where the patina is wanted. Thickness, finish and patina behaviour are confirmed against the sample and project brief.
Quality Inspection, Packaging and Delivery
For project purchases, the inspection and delivery points below are what a buyer should expect to verify.
Inspection of Material, Thickness and Dimensions
Alloy, temper, base-sheet thickness and panel dimensions are checked against the order and the applicable base standard (ASTM B209/B209M for aluminum flat-rolled product). The actual inspection equipment and procedure at GNEE are confirmed per order.
Perforation Accuracy and Pattern Consistency
Hole diameter, pitch, arrangement and open area are verified for pattern consistency across a batch, since facade runs need matched panels. Tolerances are agreed from the drawing.
Surface Finish and Appearance Inspection
Coating or anodized appearance, edge coverage and flatness are checked visually and against the approved sample. Film thickness and color are confirmed per the finish spec.
Protective Packaging for Export Shipment
Panels are protected with film, interleaving and edge protectors, then packed on pallets or in crates with moisture protection for export. Packaging follows the panel size, finish and destination.
Frequently Asked Questions
Which metal should I choose for architectural screens?
Aluminum is the common first choice for weight, corrosion resistance and finish options. Stainless steel suits aggressive coastal or specification-driven environments, carbon steel fits budget and strength-led projects, and copper is chosen for a living patina look. There is no single material that fits every project; the choice follows weight, environment, budget and finish together.
Are perforated aluminum screens suitable for outdoor use?
Yes. Aluminum resists atmospheric corrosion and is widely used outdoors for facades, balconies, fences and sun screens. A coil-coated, anodized or PVDF finish extends weather resistance; the coating system and film thickness are confirmed per project.
How does open area affect privacy?
Open area is the share of the panel that is hole. Lower open area screens more and gives more privacy but reduces airflow and light; higher open area does the opposite. Privacy also depends on viewing angle and distance, so a single privacy rating is not stated without the project geometry.
Can perforated metal screens be customized?
Yes. Alloy, temper, thickness, hole pattern, hole size, pitch, open area, edge form and finish can all be specified to drawings, DXF/DWG/PDF or a sample. Processing scope and maximum sizes are confirmed per inquiry.
What thickness is suitable for a perforated facade screen?
Thickness follows panel size, open area, edge form, support spacing and wind load rather than a fixed value. Common architectural aluminum ranges sit around 1.5–3.0 mm for stiffer facade and partition panels; the exact value is set against the project's support and loading conditions.
Can you supply stainless steel, carbon steel and copper screens?
GNEE's core supply is perforated aluminum, and can assist with sourcing perforated stainless steel, carbon steel and copper sheets for project requirements. Grades, thicknesses, finishes and processing are subject to confirmation against the project drawings and supply scope.
What information is needed for a quotation?
Send material, alloy/grade, thickness, panel size, hole pattern, hole size, pitch, target open area, finish, quantity, application and destination, plus the drawing. A drawing lets us confirm hole layout, edges and tolerances faster than a text spec alone.
About GNEE
GNEE has supplied aluminum products since 2008 and ships to 100+ countries and regions.
Core supply for this topic is perforated aluminum screen panels; other metals are sourced to project requirements.
MOQ is flexible - small trial orders and large-volume orders are both accepted.
Standard lead time is 15–30 days, with MTC to EN 10204 3.1 per batch.
Drawings are reviewed for alloy, thickness, hole pattern, open area and finish before quotation.
Standards & scope note: ASTM B209/B209M covers the aluminum flat-rolled base material, not the finished perforated screen system. EN 485 series covers aluminum sheet mechanical properties, dimensions and tolerances (specific part to be selected). EN 1396 covers continuously coil-coated aluminum (scope for a given finish). EN 13964 covers suspended ceilings and is not applied to facade screens. Wind load, fixings and structural safety follow the project's local building code and are verified by the project engineer.
GNEE supplies perforated metal screen panels and assists with other-metal sourcing.