Repair Systems — 01
Balcony edge trims — waterproof termination and drip edge
Technical product reference for balcony perimeter edge trim systems used in balcony and terrace waterproofing remediation on Australian Class 2 strata buildings. Covers aluminium (powder coat and anodised) and custom fabricated 316L stainless steel edge trim selection for standard and coastal environments — membrane-integrated drip edge termination, tile anchor profiles, and concealed-fix perimeter trim systems.
What are balcony edge trims & drip edges?
Balcony edge trims terminate and protect the waterproofing membrane at the slab perimeter and form a drip edge that keeps rainwater off the facade and from tracking back under the slab. They range from a simple commodity anodised drip angle, through proprietary concealed-fix aluminium trims and tile-anchor profiles that lock the tile edge into the adhesive bed, to custom-fabricated 316L stainless trims for coastal buildings. The trim is not the waterproofing seal itself — selection turns on matching the cover/projection to the tile build-up, the material and finish to the salt-air exposure, the fixing/anchor detail, and confirming the membrane terminates correctly under the trim.
Product Reference
Individual products — one card each — scroll to view all
Demtech Building Products
Demtech BET Series
Anodised aluminium balcony edge trim
The Demtech BET Series is an extruded aluminium balcony edge trim with a 12 mm drip edge, weep holes and a powder-coat finish to the Dulux range, used to terminate and protect the membrane edge at a tiled balcony perimeter. Confirm the current profile range, dimensions, coastal coating grade and installation sequence with Demtech.
Schlüter Systems
Schlüter BARA-RAK / BARA-RAKO
Aluminium balcony perimeter profile with tile-anchor flange
Schlüter BARA-RAK / BARA-RAKO are anodised aluminium balcony perimeter profiles whose anchor flange is bedded into the tile adhesive to mechanically support the tile edge and prevent chipping and delamination; BARA-RAKO adds an integrated end cap. Confirm available cover widths, the BARA-RAKO designation/end cap and the anodising grade with Schlüter Systems Australia.
Amark
Amark All-Edge Trim
Extruded aluminium concealed-fix balcony edge trim
The Amark All-Edge is an extruded aluminium concealed-fix balcony edge trim available in multiple profile configurations; a base section is fixed before the membrane and a cover is clipped on at completion for a fastener-free finish. Confirm available profiles, finish grades and coastal suitability with Amark.
Trade supply — various
Anodised Aluminium Drip Angle
Commodity drip-angle membrane termination profile
A standard anodised aluminium drip angle is a commodity membrane edge-termination profile: the upstand protects the membrane turn-down and the nosing forms a drip edge at the slab underside. It is a budget detail with no tile-anchor or concealed-fix feature — select on leg size, gauge and anodising grade appropriate to the salt-air exposure.
Custom fabrication — specify 316L
Custom 316 Stainless Steel Edge Trim
Fabricated marine-grade stainless edge trim (coastal)
Custom 316L stainless steel edge trims are fabricated to a project-specific profile for coastal balconies where aluminium powder coat / standard anodising will not last; 316L resists chloride pitting far better than 304. Use 316 fixings throughout, passivate welds, and for front-row ocean exposure consider 2205 duplex. Require a material certificate confirming 316L.
System Comparison
Balcony edge trims & drip edges — confirm all selections against the current manufacturer TDS before specifying.
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Always install edge trim before membrane application
Balcony edge trims must be installed and fixed to the substrate before the waterproofing membrane is applied — not after. The membrane must lap under or behind the base section of the trim to create a waterproof seal at the edge. Installing the trim after the membrane is applied results in a non-waterproof detail that will fail at the junction. Confirm the installation sequence with the trim manufacturer and waterproofing applicator before work commences.
Specify 316L stainless steel for all coastal locations
Standard aluminium powder coat and standard anodised finishes are not appropriate for buildings within 1 km of the ocean or in severe salt air environments. Specify 316L (marine grade, molybdenum-alloyed) stainless steel — not 304 grade — for any coastal application. 304 grade stainless will show pitting, rust staining, and surface corrosion within 2–3 years in coastal environments. Always require a material test certificate from the fabricator confirming 316L grade.
Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer technical data sheet, project specification, membrane system compatibility, coastal exposure zone assessment, tile thickness and adhesive bed depth, NCC requirements, and waterproofing consultant advice. Balcony edge trims must be installed before the waterproofing membrane is applied. Grade 316 stainless steel is required for marine-exposed locations. Do not rely on this reference as a substitute for professional waterproofing consultant advice.