Repair Systems — 01
Protection boards — membrane over-protection
Technical product reference for protection boards used over waterproofing membranes on balconies, terraces, podium slabs, and roof decks. Covers foam board, rigid board, dimple mat, and composite protection systems — material selection, compressive strength, membrane compatibility, and system position for Australian Class 2 strata building applications.
What are protection boards?
Protection boards are laid over a cured waterproofing membrane to shield it from screed, backfill, pavers, ballast or site traffic before the final finish is placed. They range from flat XPS foam and fluted-polyethylene boards that simply protect, through dimpled HDPE and geocomposite mats that also create a drainage void, to composite root-barrier boards for planted build-ups. They are protection — not structural or load-spreading — layers, and most sit loose over the membrane. Selection turns on whether a drainage void or root barrier is needed, the compressive grade for the loading, and pairing drainage mats with a filter geotextile.
Product Reference
Individual products — one card each — scroll to view all
ARDEX Australia
ARDEX Protection Board
Fluted polyethylene protection board
ARDEX Protection Board is a lightweight fluted-polyethylene (corflute-type) sheet laid loose over a cured ARDEX membrane to protect it from screed, backfill and site traffic before the finish is placed. Laps are taped; it is not a structural board.
Various
XPS Extruded Polystyrene Protection Board
XPS foam protection / insulation board
XPS extruded-polystyrene board is a lightweight, moisture-resistant rigid board placed over the membrane under a screed or paver build-up, available in several compressive-strength grades. It is solid — it protects but provides no drainage void.
Reln / various
HDPE Dimpled Drainage & Protection Mat
Dimpled HDPE drainage/protection mat
A dimpled HDPE drainage and protection mat protects the membrane and creates a drainage void above it on podium slabs, roof decks and planter boxes. A filter geotextile must be laid above it to stop fines clogging the void.
Colbond / Enka / various
Enkadrain / Geocomposite Drainage & Protection Mat
Geocomposite drainage + protection mat
Enkadrain-type geocomposite mats combine a drainage core with a bonded geotextile filter, providing membrane protection and a drainage void in a single layer over podium and roof decks and green roofs. Confirm current AU availability.
Alwitra / various
Composite Root-Barrier & Protection Board
Root-resistant protection board
A composite root-barrier and protection board protects a sheet membrane and resists root penetration on planted podium boxes, green roofs and planted terraces, sitting below the drainage layer and growing medium. Confirm AU availability and root-barrier suitability for the species.
Schlüter-Systems Australia
Schlüter-DITRA / DITRA-HEAT Uncoupling Mat
Polyethylene uncoupling & protection mat
Schlüter-DITRA is a dimpled polyethylene mat with fleece backing that uncouples and protects under a tiled finish, accommodating substrate movement. Confirm external-balcony suitability and membrane compatibility with Schlüter Australia.
System Comparison
Protection boards — confirm all selections against the current manufacturer TDS before specifying.
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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, applied loading, compressive strength requirements, drainage design, NCC requirements, and landscape architect or hydraulic engineer advice where applicable. The waterproofing membrane must be inspected and flood-tested before any protection board is placed over it. Do not rely on this reference as a substitute for professional waterproofing consultant advice.