About The Silca System

The hexagon design creates a super-strong substructure (subfloor) capable of sustaining heavy deck materials, such as brick, travertine, slate, granite, marble, and natural stone, thus giving you more decking options than you ever thought possible!

Silca Grate grids measure 400mm x 450mm and are composed of durable 38.5mm thick engineered polymer. Not only is Silca Grate suitable for elevated decks and patios, but it can be used for ground applications, porches, bridges, pool decks, rooftop decks, and more! How is it possible, you wonder? The 50mm diameter honeycombs on the Silca Grate grids offer 360 degrees of solid support, allowing Silca Grate to not only meet residential and commercial building codes, but to exceed them.

Not only is Silca Grate UV stable and easily cut to form, it is also quick and easy to install. In fact, you can install it yourself! To secure Silca Grate to your deck frame, put 6 screws into the floor joists spaced at 400mm centres and you’re good to go.

Where to use Silca Systems?

  • Elevated or Raised Decking
  • Balconies
  • Pool Decks
  • Staircases
  • Level Entry Decks
  • Over Membrane, Slab or Flat Roofs
  • and more…

Silca Grate

The key element to the Patented Silca System is the Grate. This is the 400x450x38mm structural component that screws direct to the timber deck frame and provides the solid flat surface on which to lay almost any kind of paving. Silca Grates features: a) strengthening ribs and hex cells to spread and transfer load across the decking element and down onto the joist. b) pre-formed countersunk holes designed to guide the screws into the joist at the correct position. (remember to not overtighten screws as this can damage the countersink) c) a second row of fixing so grates can be uniformly trimmed to slot in between joists should more height clearance be required. (This requires extra timbers clashed to the side of the joist for the grate to sit on.) d) free draining design for minimum moisture retention e) micro flex to absorb any movement within the decking element and reduce risk of any tile or grout disturbance f) UV stable g) manufactured from 100% recycled materials. Green Building Product

Silca Connector

Silca I-Lock Connectors are used where screwing options are limited or not suitable, e.g. close to membrane, on ground applications, or simply to provide even more strength. The connectors lock each Grate together with the adjacent Grate on all 4 sides. 2 Connectors per side. Simply push down into the designated slots in each side of the Grate, then nock in tight with a hammer.

Silca Mounts

Used for over membrane or concrete slab applications. At 15mm thick, the rubber mounts can be placed either directly underneath the Grates or underneath a ripped timber joist to provide drainage between it and the membrane. We recommend using Silca I-Lock Connectors when Grates are installed over any floating frame.

Perfect to use with CMP Porcelain tiles

Want to know more about Silca Systems for your project?

Visit Our Showroom


98 Hillside Road, Wairau 0627, Auckland

Mon-Fri: 8am till 5pm

Sat: By Appointment

(09) 415 4588

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Simply give us call on 0800 446 378 or Email us info@ssld.co.nz 

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