Repair Systems — 03 — Facade & External Envelope
Profiled aluminium cavity tray
Supplier reference for profiled aluminium cavity tray for masonry facade remediation on Class 2 strata buildings. Covers extruded tray profiles with integral upstand, weep drainage geometry, and drip edge — from lintel-seated systems to custom extrusions for non-standard cavity widths.
What are profiled aluminium cavity tray systems?
Profiled aluminium cavity tray systems are factory-formed extruded aluminium profiles used at base of cavity, over lintels, at parapet level, and at window sill junctions — replacing flat strip flashing with a rigid, purpose-designed profile incorporating integral upstand, drip edge, and weep drainage geometry.
Product Reference
3 products — 3 suppliers — profiled aluminium cavity tray systems — scroll to view all
Keystone Aluminium Cavity Tray Profile
Extruded aluminium cavity tray — lintel-seated profile
System Description
Keystone's cavity tray profile is designed to coordinate with Keystone duplex-coated and galvanised steel lintels — the tray seats on the lintel top flange and provides an integral upstand, weep slots at 450mm centres, and a formed drip edge. Eliminates the need to site-fabricate weep formers from flat strip, ensuring consistent drainage geometry and reducing site installation error. Available in mill finish and powder coat finish. Suitable for standard 50mm and 75mm cavity masonry at residential and Class 2 strata building remediation. Confirm current profile dimensions, powder coat availability, and pricing with Keystone Lintels before specifying.
Technical Properties
- Alloy: 6063-T5 extruded aluminium
- Wall thickness: 1.6mm
- Standard cavity widths: 50mm and 75mm — non-standard requires custom extrusion
Limitations
- Profile dimensions matched to Keystone lintel top flange — may require adaptation for other lintel brands
- Non-standard cavity widths require custom extrusion — confirm with Keystone before ordering
- Powder coat option has longer lead time — confirm with Keystone before scheduling installation
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Extrude-a-Trim Custom Aluminium Cavity Tray
Custom extruded aluminium cavity tray — made to specification
System Description
Extrude-a-Trim specialises in custom aluminium extrusions for building applications including cavity flashings. Cavity tray profiles can be manufactured to specific cavity widths, upstand heights, and drainage outlet configurations. Suited to remedial projects with non-standard or variable cavity dimensions where purpose-designed geometry is required. Minimum order quantities apply — confirm at enquiry. Dimensional confirmation from site survey is required before ordering. Lead time typically 2–4 weeks from drawing approval.
Technical Properties
- Alloy: 6063-T5 extruded aluminium
- Wall thickness: as specified — 1.2–2.0mm standard range
- Cavity widths: custom — any width to specification — no standard limits
Limitations
- Custom extrusion — minimum order quantities and lead time apply — not suitable for urgent or small-quantity projects without pre-planning
- Profile design requires dimensional confirmation from site survey before ordering
- Higher unit cost than standard profiles — justified where non-standard cavity widths rule out catalogue products
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Capral Standard Extrusion Profiles (Adapted for Cavity Tray)
Standard extruded aluminium sections — adapted for cavity tray
System Description
Capral's standard extrusion library includes angle, Z-section, and channel profiles that are frequently adapted for cavity tray applications on remedial projects where custom extrusion lead time is not acceptable. Profile selection requires design input from the project engineer or remedial practitioner to ensure adequate upstand height, weep drainage, and lap geometry. Weep slots must be site-formed or drilled — no integral weep geometry in standard sections. Ex-stock nationally from Capral branches — most economical option where urgent supply is required.
Technical Properties
- Alloy: 6063-T5 / 6061-T6 standard extrusion alloys
- Thickness: varies by section — confirm wall thickness with Capral for selected profile
- Standard sections: angle, Z-section, channel, flat — adapted for cavity tray by project engineer
Limitations
- Standard sections are not purpose-designed for cavity tray use — require engineer design input to confirm suitability for each application
- Weep slots and drainage geometry must be formed or drilled on site — adds labour cost and risk of inconsistent spacing
- No purpose-designed cavity tray product — adaptation must be verified by project engineer before installation
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of profiled aluminium cavity tray systems. Confirm all product selections with current supplier TDS before specifying.
| Supplier | Product | Alloy | Cavity widths | Weep geometry | Distribution | Key feature | Primary use |
|---|---|---|---|---|---|---|---|
| Keystone Lintels | Keystone Cavity Tray | 6063-T5 | 50mm, 75mm standard | Integral slots at 450mm | National — Keystone branches | Designed for Keystone lintel system | Over Keystone lintels — new and remedial masonry |
| Extrude-a-Trim | Custom Cavity Tray | 6063-T5 | Any — custom extrusion | Specified at design | Direct — made to order | Non-standard cavity widths to specification | Non-standard or complex cavity geometries |
| Capral | Standard Sections (adapted) | 6063-T5 / 6061-T6 | Design-dependent | Site-formed / drilled | National — Capral ex-stock | Immediate availability — ex-stock | Urgent remedial — engineer adaptation required |
Do not confuse profiled cavity tray with:
- Mill finish aluminium flashing strip — flat, unprofile strip without integral upstand or weep geometry — requires site-formed weep formers and dressed upstand — listed on the mill finish aluminium flashing page
- Powder coated aluminium flashing strip — same flat profile as mill finish, colour-coated — listed on the powder coated aluminium flashing page
- Lead flashing — heavier, malleable, self-sealing at laps — different material class — listed on the cavity flashing — lead page
- Alcore composite flashing — bitumen-aluminium laminate, flexible self-adhesive type — different material — listed on the cavity flashing — Alcore page
- Keystone cavity tray vs Keystone lintel — the lintel is the structural element; the cavity tray sits on top of it and is a separate product — both must be specified
Disclaimer
This page provides general technical information only. Cavity tray type, profile, alloy, weep spacing, and installation detail must be confirmed by a qualified remedial practitioner and, for structural masonry, a structural engineer, against project-specific conditions and AS 3700.