Walnut Hills Collection — 6mm Waterproof SPC (Republic Floor)

The Walnut Hills Collection is a wood-look SPC vinyl plank line within the Republic Floor lineup, engineered with a 100% waterproof Stone Polymer Core and a 20 mil wear layer for genuine kitchen-and-bath durability. Each 7.17188″ x 48″ plank locks together with an angle-drop click-lock system and ships with a 1.5mm Bio Guard anti-bacterial acoustic EVA pad pre-attached, so no separate underlayment purchase is needed. The line spans 5 colors, from light and dark grey tones through medium brown and multi-tone rustic looks, and is backed by a 25-Year Residential / 10-Year Commercial warranty plus FloorScore certification for verified indoor air quality. Walnut Hills is available to order through our Santa Clara showroom.

Walnut Hills Collection specifications

• Core & thickness: SPC (Stone Polymer Core), 6mm total
• Wear layer: 20 mil
• Plank size: 7.17188″ x 48″
• Locking: Angle-drop click-lock · Underlayment: 1.5mm Bio Guard anti-bacterial acoustic EVA (pre-attached)
• Coverage: 23.73 sq ft/carton · Waterproof: Yes — 100% waterproof, no time limit
• Warranty: 25 Years Residential / 10 Years Commercial
• Certifications: FloorScore
• Colors: 5 — light grey through dark grey/near-black, plus medium brown and multi-tone rustic

Colors in the Walnut Hills Collection

The Walnut Hills Collection spans one of the widest grey ranges in the Republic Floor catalog, running from Gray Mist and Graphite Grey at the lighter end through Granito Nero, a near-black charcoal grey, at the deep end — genuine light-to-dark grey coverage inside a single line. Light Sand and Mountain Tan round out the collection with warmer, medium-brown, multi-tone rustic looks for rooms that want less grey and more traditional warmth. Whether a room calls for a bright, cool grey floor or a deeper charcoal statement, this collection covers both ends without leaving a gap in between.

Best uses for Walnut Hills Collection

• Kitchens & bathrooms — the SPC core is 100% waterproof with no time limit, so spills, splashes, and wet zones aren’t a concern.
• Basements & below-grade rooms — approved for above-grade, on-grade, and below-grade installation.
• High-traffic households & pet owners — the 20 mil wear layer stands up to daily foot traffic, claws, and everyday scuffs.
• Radiant-heat rooms — compatible with hydronic and embedded radiant systems as long as the floor’s surface temperature stays at or below 85 degrees F.
• Rentals & multi-family units — the pre-attached Bio Guard acoustic pad adds sound dampening between floors, useful in condos and rental properties.

Choosing a color from the Walnut Hills Collection

Lighter greys like Gray Mist read cool and airy in rooms with limited natural light or light-toned cabinetry, while Graphite Grey and Granito Nero anchor a room with darker, more dramatic contrast against pale walls or countertops. Light Sand and Mountain Tan lean warmer and pair well with wood-tone cabinetry or traditional trim where a straight grey might feel too cool. Because grey undertones shift under different lighting, bring your room’s paint or cabinet sample and view a physical plank at our Santa Clara showroom before ordering.

Frequently asked questions about the Walnut Hills Collection

Is Walnut Hills real walnut hardwood?

No — despite the name, Walnut Hills is a wood-look SPC vinyl plank floor with a printed wood-look layer over a Stone Polymer Core, not solid or engineered walnut wood. The name describes the collection’s aesthetic, not its material.

Is the Walnut Hills Collection waterproof enough for a bathroom or kitchen?

Yes. The SPC core is 100% waterproof with no time limit on water exposure, making it suitable for kitchens, bathrooms, laundry rooms, and other wet areas.

Can Walnut Hills go over radiant heat?

Yes — it’s compatible with hydronic and embedded radiant heat systems, provided the floor’s surface temperature never exceeds 85 degrees F.

Do I need to buy extra underlayment?

No. Each plank ships with a 1.5mm Bio Guard anti-bacterial acoustic EVA pad pre-attached, and additional underlayment is not permitted — the only exception is a mandatory 6-mil poly moisture barrier required under any installation over concrete.

How many boxes do I need to cover my room?

Each carton covers 23.73 square feet. Measure your room’s square footage, add roughly 10% for cuts and waste, and divide by 23.73 to get the carton count — our Santa Clara showroom can help confirm the order.