Perforated Metal Facades Singapore: Specification Guide for Architects and Designers
Perforated metal facades are used across Singapore’s commercial, residential, and institutional buildings for solar screening, natural ventilation, privacy control, and decorative cladding. This guide addresses the specification questions architects and interior designers ask most often — covering perforation options, panel sizing, material grades, finishes, ETTV performance, and retrofit applications.
What Are the Practical Advantages of Perforated Metal Cladding?
Perforated metal gives architects direct control over three envelope performance variables simultaneously: natural light transmission, airflow, and solar heat gain — all determined by the open area percentage of the panel.
Large perforations (high open area) maximise natural light and cross-ventilation, reducing dependence on artificial lighting and mechanical cooling. This is directly relevant to Singapore’s BCA Code for Environmental Sustainability, which requires non-residential buildings to meet ETTV limits. A perforated metal screen installed as a secondary facade layer intercepts solar radiation before it reaches the primary wall or glazing surface, reducing the solar heat gain component of the ETTV calculation.
Lower open area percentages (under 40%) provide privacy screening while still allowing partial light and air transmission. This makes perforated metal applicable across a wide range of facade types — from fully open screens on carpark and industrial facades to close-pitched panels on residential and commercial frontages.
The open-area geometry also prevents water pooling on the panel surface, reducing biological fouling and corrosion risk compared to solid cladding in Singapore’s high-humidity, high-rainfall conditions.
What Perforation Options Are Available?
There are no practical restrictions on hole size or density, provided panels are designed to maintain structural integrity and resist warping under the specified span and wind load.
Hole Shapes
Standard punch-die patterns include round, square, slotted, hexagonal, and elongated holes.
Custom geometries — including brand-specific or architect-designed patterns — can be produced by laser cutting to ±0.1 mm tolerance.
Open Area Percentage
Open area is determined by hole diameter and pitch (centre-to-centre spacing). The table below shows typical open area ranges for common hole patterns:
| Hole Pattern | Open Area Range | Typical Application |
| Round, staggered pitch | 1–61% | Facade screens, linkway panels, carpark cladding |
| Round, straight pitch | 1–50% | Privacy screens, bin centres, semi-opaque cladding |
| Square hole, straight pitch | 15–33% | Decorative panels, feature walls, lobby screens |
| Slotted / elongated hole | 12–60% | Balustrade infill, low-level screens, acoustic panels |
| Custom laser-cut geometry | Variable by design | Design-led facade features, branded panels |
Can Perforated Cladding Panels Be Customised?
Panel dimensions, perforation pattern, material grade, and surface finish are all specifiable to project requirements. Standard sheet size is 1220 mm × 2440 mm, but panels can be supplied cut to any dimension required by the facade grid. Maximum panel size depends on material, thickness, and the specified perforation pattern Supply Bay can advise on the maximum practical size for a given specification to ensure panels resist warping under Singapore’s wind and thermal cycling conditions.