Description
Silca System SilcaGrate – 16″ x 18″ x 1-1/2″
Structural Deck Underlayment for Stone, Pavers, Tile & Brick
The Silca System SilcaGrate by StoneDeks is a patented, structural underlayment designed to transform standard wood or metal-framed decks into long-lasting surfaces finished with stone, porcelain tile, pavers, brick, or travertine. Engineered for strength, drainage, and durability, SilcaGrate makes it possible to achieve the beauty of hardscape materials on elevated deck structures.
Manufactured from thick, engineered recycled polymer, SilcaGrate features a hexagonal honeycomb structure that provides structural support every 2 inches, evenly distributing weight and minimizing deflection. Each grate measures 16″ x 18″ x 1-1/2″, weighs approximately 4 lbs, and has been certified to support over 500 lbs per grate for 30 days, making it suitable for heavy exterior surface materials.
Key Features & Benefits:
- Patented structural deck underlayment system for stone and paver decks
- Engineered recycled polymer construction for long-term durability
- Hexagonal honeycomb design provides consistent support every 2 inches
- Certified strength supports 500+ lbs per grate
- Lightweight yet rigid at approximately 4 lbs per grate
- Excellent drainage and airflow to protect deck framing
- Compatible with stone, porcelain, pavers, brick, and tile
- Each grate covers 2 square feet
Installation Options:
- New Construction: Installed directly over wood or metal joists
- Existing Decks: Mounted inside joists using cleats
- Fastening: Secured with #9, 3″ deck screws at each corner
- Cut-to-Fit: Easily trimmed with a handsaw or circular saw for edges, posts, or layout adjustments
Accessory Layers (Recommended):
- SilcaMat or geotextile fabric placed over SilcaGrate for mold resistance and noise reduction
- SilcaSpacers ensure consistent joint spacing, proper alignment, and improved drainage
Surface Applications:
Once installed, SilcaGrate supports a wide range of finish materials:
- Stone and travertine
- Porcelain pavers and tiles
- Brick and concrete pavers
- Tile thickness range: 3/4" to 3"
- Polymeric sand is typically used between joints for stability and longevity.
Ideal Applications:
- Elevated deck-to-paver conversions
- Outdoor living spaces and patios
- Pool decks and balconies
- Residential and commercial deck upgrades
Why Choose SilcaGrate?
Traditional decks limit surface options, but SilcaGrate opens the door to true hardscape finishes without sacrificing structural integrity. Designed for builders, contractors, and homeowners seeking a low-maintenance, long-lasting deck solution, SilcaGrate delivers strength, flexibility, and design freedom.
Upgrade your deck with confidence using the Silca System SilcaGrate – 16″ x 18″ x 1-1/2″, the foundation for beautiful, durable stone and tile deck surfaces.
