The Cliffs XL — 5mm Waterproof SPC (Republic Floor)

The Cliffs XL is Republic Floor’s extra-long-format SPC line, built on a rigid 5mm stone polymer core with a 12 mil wear layer for busy, water-prone rooms. Each plank locks together with an angle-drop click system and carries a pre-attached 1.5mm acoustic EVA pad, so no separate underlayment is needed beyond a moisture barrier over concrete. At 7.125″ wide and a full 60″ long, The Cliffs XL runs noticeably longer than a standard-format SPC plank, cutting seams and letting the grain read across the room with fewer breaks. The collection ships in 8 colors spanning light brown, medium beige, and light grey tones, is backed by a 50-Year Residential / 10-Year Commercial warranty and FloorScore certification, and is available to order through our Santa Clara showroom.

The Cliffs XL specifications

• Core & thickness: SPC (Stone Polymer Core), 5mm total
• Wear layer: 12 mil
• Plank size: 7.125″ x 60″
• Locking: Angle-drop click-lock · Underlayment: pre-attached 1.5mm acoustic EVA pad
• Coverage: 30.0 sq ft/carton · Waterproof: yes, fully waterproof SPC core, no time limit
• Warranty: 50 Years Residential / 10 Years Commercial
• Certifications: FloorScore
• Colors: 8 — light brown, medium beige, and light grey tones

Colors in The Cliffs XL

The Cliffs XL’s 8 colors sit within three families — light brown, medium beige, and light grey — so the range reads as a warm, natural mix rather than a stark light-to-dark spread. American Elm, Bay Laurel, Mulberry Oak, and Northern Oak lean into warmer mid-tone browns, European Beech and English Oak sit in soft beige, and Silver Birch and Sweet Chestnut round out the lighter, cooler end. That spread covers most cabinetry and trim colors without pushing into very dark or very pale extremes.

Best uses for The Cliffs XL

• Kitchens & bathrooms — the fully waterproof SPC core handles spills, splashes, and everyday moisture without swelling or warping.
• Basements & below-grade rooms — rated for above, on, and below-grade installs, where wood and many laminates aren’t approved.
• Pet households & high-traffic areas — the 12 mil wear layer resists scuffs and scratching from claws and daily foot traffic.
• Open-concept living areas & great rooms — the extra-long 60″ plank keeps sightlines uninterrupted across large open floor plans, with fewer seams than a standard-length SPC.
• Rooms with radiant heat — compatible with hydronic and embedded radiant systems up to an 85°F surface temperature.
• Rental properties — the floating click-lock install with an attached pad simplifies both installation and future removal.

Choosing a color from The Cliffs XL

In bright, sunlit rooms almost any color in The Cliffs XL will read well, but in a room with limited natural light lean toward the lighter end of the range — Silver Birch or Sweet Chestnut — to keep the space feeling open. Pair a mid-tone brown like American Elm or Bay Laurel with white or light cabinetry for contrast, or with warm wood-tone cabinets for a more monochromatic look. Because SPC color and grain can read differently under showroom LED lighting than in a north-facing kitchen, bring home a sample or see a full plank in person at our Santa Clara showroom before ordering full cartons.

Frequently asked questions about The Cliffs XL

Is The Cliffs XL waterproof?

Yes, fully waterproof. Its SPC (Stone Polymer Core) does not swell, warp, or break down from standing water or humidity, with no time limit — unlike a laminate core, which has a limited moisture-exposure window.

Can I install The Cliffs XL over radiant heat?

Yes. The Cliffs XL is compatible with hydronic and embedded radiant heat systems as long as the floor’s surface temperature stays at or below 85°F.

Do I need to add underlayment under The Cliffs XL?

No. Each plank comes with a pre-attached 1.5mm acoustic EVA pad. The only addition ever needed is a 6-mil moisture barrier when installing over a concrete subfloor.

How many cartons of The Cliffs XL do I need?

Each carton covers 30.0 square feet. Measure the room’s square footage, add 5-10% for cuts and waste, then divide by 30 to get the carton count — our Santa Clara showroom can help confirm your order.

Why is The Cliffs XL plank so long?

At 60″ long and 7.125″ wide, The Cliffs XL runs noticeably longer than a standard SPC plank. That gives open floor plans fewer seams and a longer, more continuous grain read across the room.