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Installation accessory

Silca Grate 16" x 18.25" X 1.5"

4.8 out of 5 · 5 reviews

11,000+ People ordered

MASSIVE TWO-DAY SALE ENDING WEDNESDAY 10/28/26

Purchase option (Select one)
Price for 1 sq ft $10.95

Design your patio
Pale paving runs beside blue pool water and a timber fence, with several potted trees grouped on the deck.
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Product description

Silca System ® is a structural subbase for elevated decks that is connected to wood floor joists providing a substructure for a wide variety of heavy decking materials such as travertine, marble and other natural stones.

When building a new deck or resurfacing an existing deck. Silca System® is engineered for strength and easy installation to create an attractive, long-lasting, low maintenance deck.

Silca Grate™ has made it possible for DIY homeowners, deck architects, deck designers, deck builders to be creative with new and exciting decking ideas for a durable deck flooring that enhances the outdoor living experience.

Each Silca Grate covers 2 sqft. 

This item ships separately.

Please call us to receive a freight quote for your project
(800) 556-9720.

Specifications and uses

Price unit
sq ft
Uses
Stone surfaces on elevated decks
Dimensions
16 x 18.25 x 1.5 in
Published coverage
2 sq ft per grate

Deck design and installation

  • Stone on an elevated deck

    The grate provides a subbase for travertine, marble and other stone decking materials. Confirm the complete assembly with your deck designer.

  • Plan the supporting structure

    Check joist spacing, fasteners and allowable loads against the current installation instructions before you order.

Buying from Travertine Mart

  • Serving stone projects since 2007
  • BBB Accredited with an A+ Rating
  • 31-Day Return Policy

    Review the return conditions before you order.

Order and delivery information

Delivery arrangements and optional services are listed in your estimate.

Freight and delivery · Terms of Sale

Rating & Reviews

Silca Grate 16" x 18.25" X 1.5"
4.8 rating based on 5 reviews
Overall rating: 4.8 out of 5 based on 5 reviews.
Anonymous

Deck renovation

These grates are exactly what I needed for my deck project. I was able to put travertine pavers on top instead of using wood like I originally planned. The grates are strong and hold the stone perfectly without any sagging. Shipping came right to my driveway on a pallet and the driver was helpful. Customer service answered all my questions about how to install them before I even ordered. The price was way better than buying a whole new deck system. My deck looks amazing now with real stone on it. I would recommend these grates to anyone who wants stone decking without the heavy concrete base.
Mike D.

Patio upgrade

I used these Silca grates to build a patio over my old concrete slab and it worked out great. The grates snap together easy and you can cut them with a regular saw. Once I put the travertine on top you couldn't even tell there was a grate system underneath. The shipping was fast and everything arrived in good shape. The lady on the phone helped me figure out how many grates I needed for my square footage. The price was fair and the quality is solid. My patio is now level and drains well because of the gaps in the grates. Best home improvement I have done in years.
Sarah K.

Rooftop terrace

I put these grates on my rooftop terrace because I needed something lightweight but strong. The Silca system holds the travertine pavers perfectly and the whole setup is way lighter than a concrete pad would be. The delivery guy brought them up to my garage and helped me count everything. Customer service sent me installation instructions by email right after I ordered. The grates are made of good material that feels like it will last a long time in the Florida sun. My rooftop looks like a fancy hotel now. I am very happy with this purchase and the company.
Carlos R.

Poolside deck

These grates saved me so much money on my pool deck project. Instead of pouring concrete I just laid these down and put travertine on top. The grates are sturdy and the pavers sit flat with no wobble. Shipping was quick to Arizona and the pallet was wrapped tight so nothing got damaged. The guy I talked to on the phone knew exactly what I was trying to do and made sure I ordered enough. The system is easy to work with even for someone who isn't a professional contractor. My pool deck looks high end and cost me way less than I expected. I would buy from Travertine Mart again for sure.
Linda P.

Garden walkway

I built a garden walkway using these Silca grates and some ivory travertine pavers. The grates keep everything level and let water drain through so my walkway never gets puddles. The quality is really good, they feel tough and well made. Delivery came on time and the freight company called me the day before to confirm. Customer service helped me pick the right size grate for my paver size so everything would match up. The price was reasonable and the whole project came together in one weekend. My wife loves how the walkway turned out and I love that I did it myself. Great product from a great company.
Tom B.
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