Repair Systems — 03 — Facade & External Envelope
Aluminium arris & corner angle beads
Technical product reference for aluminium arris and corner angle beads used in render repair, removal and reinstallation works on Australian Class 2 strata and commercial buildings. Covers product classification, material grades, duty ratings, and brand comparisons.
What are aluminium arris and corner angle beads?
Aluminium arris and corner angle beads are extruded aluminium profiles installed at external render corners to protect the arris (the sharp edge where two render planes meet) from chipping, impact damage, and deterioration.
Product Reference
4 products — 4 brands — aluminium arris and corner angle beads — scroll to view all
Rondo Aluminium Corner Bead (Standard Duty)
Standard duty aluminium arris corner bead
System Description
Standard duty aluminium arris corner beads provide a clean, sharp edge protection at external render corners on masonry, AAC, and concrete block substrates. The perforated flanges embed in the render base coat to lock the bead in position. Standard duty aluminium beads (typically 0.5–0.6mm aluminium) are suitable for sheltered and semi-exposed facades. In coastal and high-exposure environments, consider stainless steel or PVC alternatives to avoid galvanic corrosion. Confirm bead dimensions, leg length, and material thickness with the supplier for each application. TODO: owner confirm — confirm Rondo aluminium corner bead specification, leg dimensions, and material grade.
Technical Properties
- Aluminium alloy — standard duty; Perforated flanges for render key
- 25mm or 35mm leg — confirm from supplier
- Suitable for interior and sheltered exterior applications
Limitations
- Not suitable for coastal or high-corrosion environments — use stainless steel or PVC in those zones
- Aluminium may suffer galvanic corrosion where in contact with dissimilar metals in wet conditions
- Confirm flange width and leg dimension for specific render depth
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
USG Boral Aluminium Arris Bead (Standard / Heavy Duty)
Aluminium arris corner bead — standard and heavy duty
System Description
USG Boral supplies aluminium arris and corner beads in standard and heavy duty profiles for render edge protection at external corners. Heavy duty beads (typically 0.8–1.0mm aluminium) are more resistant to impact at high-traffic corners. Confirm available leg dimensions, duty rating, and material thickness with USG Boral. TODO: owner confirm — USG Boral aluminium arris bead specification, dimensions and current range.
Technical Properties
- Aluminium — standard and heavy duty profiles
- Perforated flanges for render key
- Available in various leg lengths — confirm from supplier
Limitations
- TODO: owner confirm — USG Boral aluminium arris bead specification and current range
- Not for coastal environments — use stainless or PVC
- Confirm leg length for render depth
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Unifix Aluminium Corner Bead (Perforated Flange)
Aluminium arris corner bead — perforated flange
System Description
Unifix / Buildex distributes aluminium corner beads with perforated flanges nationally. Confirm the specific product, leg dimensions, and material specification with Unifix / Buildex. TODO: owner confirm — Unifix/Buildex aluminium corner bead specification and dimensions.
Technical Properties
- Perforated flanges for render key
- Aluminium alloy — confirm grade
- Exterior and interior masonry render
Limitations
- TODO: owner confirm — Unifix/Buildex aluminium bead specification
- Not suitable for coastal environments
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Trade-Supply Aluminium Arris Bead
Trade-supply aluminium arris corner bead
System Description
Aluminium arris and corner beads are widely available as standard stock items through plasterboard merchants, render suppliers, and building trade stores nationally. Confirm leg dimensions (25mm, 35mm, or custom), material thickness (standard 0.5mm, heavy duty 0.8mm+), and whether the supplier's product is suitable for external exposed application before purchasing. Galvanised steel variants are also available — confirm material type when ordering.
Technical Properties
- Standard stock item — widely available nationally
- Available in 25mm and 35mm leg profiles — confirm from merchant
- Standard duty 0.5mm or heavy duty 0.8mm+ aluminium
Limitations
- Quality varies between suppliers — confirm material thickness and alloy grade
- Not suitable for coastal or high-exposure environments without stainless steel or PVC alternative
- Confirm leg dimension for render depth
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of aluminium arris and corner angle bead products. Confirm all product selections against the current manufacturer TDS before specifying.
| Product | Brand | Material | Flange type | Leg size | Duty rating | Suitable environment | Primary use |
|---|---|---|---|---|---|---|---|
| Rondo Aluminium Corner Bead (Standard Duty) | Rondo | Aluminium alloy | Perforated | 25mm or 35mm — confirm | Standard duty | Sheltered and semi-exposed — not coastal | Exterior and interior render corners — masonry, AAC, concrete block |
| USG Boral Aluminium Arris Bead | USG Boral | Aluminium alloy | Perforated | Confirm from USG Boral | Standard and heavy duty | Exterior and interior — not coastal | Render edge protection at external corners |
| Unifix Aluminium Corner Bead | Unifix / Buildex | Aluminium alloy | Perforated | Confirm from Unifix | Confirm from supplier | Exterior and interior — not coastal | Masonry render corner protection — nationally distributed |
| Trade-Supply Aluminium Arris Bead | Trade supply | Aluminium alloy / galvanised steel | Perforated | 25mm or 35mm | Standard (0.5mm) or heavy duty (0.8mm+) | Interior and sheltered exterior — not coastal | General render corner protection — widely available |
Do not confuse aluminium arris beads with:
- Stainless steel beads (different material — use in coastal/corrosive environments)
- PVC arris beads (plastic not metal)
- Mesh-wing beads (have integral fibreglass mesh wings)
- Render stop beads (different profile — terminate render, not protect corners)
Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer technical data sheet, project specification, substrate condition, exposure classification, AS 3700, NCC requirements, and applicator warranty conditions. Products marked TODO: owner confirm require verification before specifying. Do not rely on this reference as a substitute for professional engineering or facade consultant advice.