🏛️ THE DESIGN IDENTITY

• The Archetype: The Crisp Architectural Stacked Limestone Field for high-impact exterior facades, outdoor fireplace surrounds, retaining walls, and modern interior feature walls.

• The Contrast: Eliminating clumsy, exposed mitered edges on corners, Mayra White Corner Pieces (6" x 18" L-Shape) provide a seamless 90-degree outer corner finish. They feature split-face limestone with soft off-white, light cream, and pale greige tones that cast warm, subtle shadows across 3D stone surfaces.

• Design Aesthetics: The premier surface choice for Modern Farmhouse Exteriors, Organic Minimalist Fireplaces, Coastal Contemporary Facades, and Textured Indoor Feature Walls.

• The Mineral Field: Natural split-face limestone—blending soft chalk white, warm alabaster cream, subtle mineral-gray striations, and a rustic chiseled surface texture.

• The Visual Flow: The staggered L-shaped interlocking format seamlessly wraps 90-degree outside corners, creating the authentic appearance of solid structural stone masonry without visible seams.

🏷️ PRODUCT TITLE

MSI Rockmount Stacked Stone Series: Mayra White 6" x 18" L-Shape Split-Face Limestone Corner Panel

📝 PRODUCT DESCRIPTION

Achieve a flawless, professional finish on outside corners with the MSI Rockmount Mayra White 6" x 18" L-Corner Panel. Designed to complement standard Mayra White flat ledger panels, these L-shaped corner pieces wrap 90-degree structural corners seamlessly, eliminating the need for complex miter cuts or exposed tile edges.

Cut from authentic natural limestone, each 6" x 18" L-panel features a rugged split-face surface with varying depths that create natural shadow lines. The soft off-white and cream palette adds clean architectural texture to exterior house facades, patio pillars, outdoor kitchen islands, and interior fireplace surrounds.

✨ KEY FEATURES

• Seamless 90-Degree L-Corner Design: Pre-shaped corner panel fits neatly around outside edges for an authentic full-stone masonry appearance.

• Authentic Split-Face Natural Limestone: Rugged, hand-cut stone face provides rich 3D texture and subtle shadow movement.

• Soft Off-White Palette: Creamy white, pale ivory, and soft greige tones bring light-enhancing elegance to interior and exterior walls.

• Modular Rockmount System: Interlocks seamlessly with standard MSI Mayra White 6" x 24" flat ledger panels.

• Weather & Fire Resistant: Natural limestone withstands exterior weathering, UV exposure, and heat around fireplace surrounds.

📊 SPECIFICATIONS

🛠️ INSTALLATION REQUIREMENTS

⚠️ CRITICAL WARNING: HEAVY STONE MORTAR & SUBSTRATE PREPARATION

• Heavy Stone Polymer Mortar: Natural stone ledger panels are heavy. Always set corner pieces using an ANSI A118.4 / A118.15 compliant polymer-modified thinset specified for heavy stone/tile (such as MAPEI® Ultraflex LFT or LATICRETE® Tri-Lite).

• 100% Back-Butter Mortar Coverage: Apply mortar to both the substrate and the back of every L-corner piece (back-buttering) to eliminate air pockets and ensure structural hold on outside corners.

Professional Installation Recommendations

• Corner-First Installation: Always set your outside L-corner pieces first, moving upward from the bottom of the wall, then work flat ledger panels outward across the wall surface.

• Dry-Stacking (No Grout): Designed for tight dry-stacked installation without grout joints. Ensure wall substrates are painted or primed with a dark/neutral waterproofing membrane so background color doesn't show through tight gaps.

💡 PRO CARE & MAINTENANCE TIPS

1. Apply Penetrating Sealer: Seal exterior or moisture-exposed limestone with a breathable, non-yellowing penetrating stone sealer (such as Miracle Sealants 511 Impregnator or StoneTech® BulletProof®) to protect against dirt, rain, and soot.

2. Clean with Soft Brush: Clean textured limestone using water and a mild pH-neutral stone cleaner. Avoid pressure washing at high PSI or using wire brushes that can etch limestone.

3. No Acidic Cleaners: Never use acid-based cleaners, vinegar, bleach, or harsh descalers on natural limestone.

💬 FREQUENTLY ASKED QUESTIONS

Q: Do I need corner pieces if I can miter flat ledger panels?

A: While flat panels can be miter-cut, pre-formed L-corner pieces save significant labor time on site and yield a far cleaner, sturdier structural corner without sharp exposed joints.

Q: Can MSI Mayra White limestone corners be used outdoors in freeze-thaw climates?

A: Yes. When installed over a properly waterproofed vertical substrate with polymer-modified thinset and sealed with a penetrating sealer, Rockmount natural stone panels perform well on exterior walls.

Q: How many corner pieces should I order for a wall?

A: Measure the total vertical height of your outside corner in inches and divide by 6 (the height of each corner piece). Always order 10% to 15% extra for height adjustments, cuts, and material staging.