Membrane Deck Solutions with Silca System
As membrane decks grow in popularity for both residential and commercial builds, the challenge remains: how do you finish the surface with hardwearing, attractive tiles or stone while staying compliant and ensuring longevity?
Silca System provides a structurally sound, E2/AS1-compliant solution for over-membrane applications—without the need for heavy concrete or cumbersome framing. Whether you’re working on a luxury rooftop, low-threshold patio, or a premium pool area, Silca System has multiple over-membrane options to suit your design and compliance needs.
1. Silca Grates on Aluminium Framing Systems
Compatible with engineered aluminium joist systems like Outdure® or TreadTech® (View Install Guide), Silca Grates provide a rigid and flat substrate for stone or porcelain surfaces. This option is ideal for situations where structure and fall are already engineered in, and you’re looking for a robust surface finish that won’t degrade or trap moisture.
2. Direct Installation on Adjustable Pedestals
For true low-profile applications, Silca Grates can be installed directly onto pedestals—such as Buzon® Pedestals via Viking Roofspec—without additional framing. Our Pedestal Info Sheet (Download PDF) outlines how to achieve a complete build-up of as little as 63mm, making it possible to achieve level entry thresholds with membrane protection and a solid tile surface.
3. E2/AS1 and Permeability
Silca System installations over membrane maintain free-draining capacity and comply with E2/AS1 extract requirements (View PDF). The open-grid design ensures water passes directly to the membrane and out through drainage layers—without ponding, warping, or rot.
Why Architects Prefer Silca
- Supports natural stone, porcelain tiles, or pavers
- Lightweight yet load-bearing
- Complies with E2/AS1 for threshold entries
- Suitable for residential or commercial decks
- All-weather, maintenance-free system
Builders frequently comment on how Silca System allows them to install the grates directly after the membrane is complete—providing a safe, durable working surface that protects the membrane during the remaining construction phase. Then, once all other works are done, tiles or stone can be fixed as the final step before handover. This simplifies sequencing, protects key elements, and keeps the job site clean and efficient.
The original Silca Grate remains unmatched in structural performance and versatility—unlike replica or non-structural systems. Made in New Zealand using recycled content, it is the proven solution for premium tiled outdoor spaces.
To learn more about available details, installation documents, and design options, visit our Resources page.
