Frequently asked questions

Learn more about the product


What is Silca System?

Silca System® is a subflooring grid that spans the space between floor joists to provide a super strong substructure for deck flooring. For more detailed information, check out our About Us section.


What Kind Of Deck Flooring Material Can Be Installed With Silca System?

Your deck flooring options are almost limitless: natural stone pavers, travertine, blue stone, brick pavers, slate, marble, granite—in a variety of shapes, colors, and sizes. (NOTE: Silca System does not include finished deck flooring at this time. All finished flooring is supplied by the customer.)


What Are Some Of The Advantages Of Using Silca System?

American invention, manufactured in New Zealand under exclusive licence for New Zealand, Australia and the South Pacifc Islands. The durable Silca Grate grids are designed to withstand freezing temperature and the harsh effects of the sun. Unlike deck boards which are known to warp, crack, distort, split, fade, and promote mould/mildew, natural stone and brick pavers are easily maintained and durable. Silca System® enables you to install these heavy-duty materials on your deck, eliminating the need for the time-consuming labour and expense of sealing and staining a wooden deck.


What Tools Are Required For Installation?

Drill or impact driver, Circular or reciprocating saw, Goggles, Measuring tape, Hammer. Visit our How It Works page for recommendations and tips on installing Silca Grate.


How Do You Connect Silca Grates To The Floor Joists?

Center the Silca Grate on the floor joist and fasten down with six #9 65mm to 75mm deck screws coated for pressure treated timber. Make sure the screws are placed into the holes at the edge of the grate. Click here to view our installation instructions and videos that will walk you through the process.


Is It Easy To Cut Silca Grates?

Yes. For customized cuts around posts or dryer vents, use a circular saw, table saw, or reciprocating or sabre saw.


Can Silca Grates Be Installed Over An Existing Deck Floor?

No. Wood and composite flooring trap water and moisture, creating an environment for mould and mildew. Wood and composite deck boards also warp and distort over a period of time, making an unacceptable surface for proper Silca Grate installation.


How Do You Adhere Pavers To Silca Grate?

Pavers are naturally designed to fit together without moving. Their rough edges, when placed side-by-side, create tension, locking the pavers in place. With that built-in design and the finished edge of your deck, your pavers will remain permanently placed. If you are using polymeric sand between pavers, the sand will harden like concrete, giving you extra insurance that your deck flooring won’t go anywhere. For places where you can’t edge and want to insure that your pavers won’t move, use a suitably certified or specified construction adhesive..


How Do You Finish The Outside Edge Of The Deck?

To finish you could choose to cover the perimeter/trimmer with a facia of timber, aluminium, plastic (PVC) or your choice of paver using a suitable adhesive


What Makes Silca Grates Structural?

Silca Grates are based on the hexagonally structure of beehives and manufactured from engineered polymers into grids that are 38.5mm thick.


Can Silca System Be Installed On Roof Tops?

Yes. Silca Grates can be installed in conjunction with roof pedestals, providing a structural surface for stone, brick pavers, or astro-turf.


Can I Purchase Silca System Locally?

Check back soon to view a list of NZ distributors. Please contact us in the mean time for any requirements.


How Do I Place An Order For Silca System?

Message us on our contact page.


How Is Silca System Shipped?

Custom shipping solutions will be arranged dependent on quantity and location. Please talk to our staff regarding your specific requirements.



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