Cerdomus Pietra di Ostuni Avorio Grip R11 16" x 24" Porcelain Tile

Technical Specifications

Installation and Handling Guidelines

⚠️ CRITICAL WARNING: EXTERIOR & HIGH-TRACTION INSTALLATION PROTOCOL

• Thinset Mortar Selection: For exterior or pool-side installations, set using a high-flexibility, frost-resistant, polymer-modified Large & Heavy Tile (LFT) thinset specified for exterior porcelain (ANSI A118.4 or ANSI A118.15 like MAPEI® Ultraflex LFT or LATICRETE® 254 Platinum).

• 100% Mortar Coverage: Back-butter each 16x24 tile AND apply directional mortar comb lines on the substrate to guarantee 100% solid mortar coverage without air pockets underneath. This prevents water entrapment and freeze-thaw tile popping in winter climates.

• Running Bond Offset Rule: When laying 16" x 24" tiles in a staggered running bond layout, TCNA standards recommend offsetting joints by no more than 33% (approx. 8 inches) rather than a 50% brick bond to minimize natural tile bow lippage.

• Grout Joint Width: Because Pietra di Ostuni features a rustic, chiseled edge profile, use a minimum 1/8" to 3/16" grout joint to complement its aged flagstone character.

Professional Recommendations

• Dry Lay & Shade Blending: The Ostuni collection carries natural shade variation (V2/V3 rating). Always mix tiles from multiple boxes prior to setting to distribute ivory and warm cream tones evenly.

• Exterior Slope: Substrates must be sloped a minimum of 1/4" per foot (2%) away from structures toward outdoor drainage points to prevent standing water.

Care and Maintenance

• Routine Outdoor Cleaning: Clean using a stiff-bristle broom or pressure washer at low setting along with warm water and a neutral outdoor tile cleaner.

• 100% Stain & Weather Proof: Impervious vitrified porcelain protects against deep staining from algae, fallen leaves, barbecue grease, wine, mud, and de-icing salts.

• Zero Sealing Required: Unlike natural travertine or porous limestone flagstones that require annual sealing to prevent frost damage, glazed Italian porcelain requires no topical sealers or impregnators over its lifespan.

Frequently Asked Questions

What does the "R11" rating mean for Cerdomus Ostuni Avorio Grip?

An R11 rating indicates a high level of slip resistance under the DIN 51130 European ramp test standard. Tiles rated R11 feature a tactile, micro-textured surface engineered specifically for wet outdoor environments, pool surrounds, and sloped ramps to prevent slips and falls.

Can I install Grip R11 tiles indoors?

While technically possible, Grip R11 tiles are designed primarily for outdoor areas and wet zones. Due to their rougher anti-slip surface texture, they offer higher resistance to mop glides during indoor cleaning compared to standard smooth matte porcelain.

How does Cerdomus Ostuni Grip R11 perform in freezing winter climates?

Vitrified porcelain from Cerdomus has near-zero water absorption (< 0.5%). Because moisture cannot penetrate the tile body, it will not crack, spall, or break during severe freeze-thaw winter cycles.