Core Composition and Everyday Performance

What Each Core Is Made Of

SPC stands for Stone Plastic Composite. Its core uses limestone powder bonded with PVC resin, creating a dense, rigid panel. WPC stands for Wood Plastic Composite. Its core blends wood fibres with PVC and a foaming agent, producing a lighter, cushioned plank. Both receive a decorative film and clear wear layer, but the core is where they diverge.

Durability and Dent Resistance

The SPC core is stone-based, measuring around 1,900 kg/m³ in density. That mass resists point loads from heavy furniture or rolling chairs. WPC cores sit near 1,100 kg/m³ — roughly 40% lighter. The foam that makes WPC comfortable underfoot also compresses under concentrated weight. For high-traffic areas with heavy cabinetry, SPC holds shape longer.

Waterproofing and Moisture Stability

Both SPC and WPC are classified as 100% waterproof at the surface. Neither plank absorbs standing water the way laminate does. The difference shows in dimensional stability under sustained humidity. SPC’s limestone core expands and contracts less than WPC’s foamed core, so it resists cupping and gapping when indoor relative humidity shifts through the seasons.

Room-by-Room Guide for American Homes

Kitchens, Bathrooms, and Laundry Rooms

In wet, high-use rooms, SPC is the safer choice. Its rigid core handles moisture from sink splash-backs and appliance condensation without swelling. It also bridges minor subfloor imperfections common in older American homes — uneven joists, patched concrete, and residual adhesive ridges. The 5G Click locking system provides a tight seam that keeps water from reaching the subfloor.

Living Rooms and Bedrooms

WPC earns its place in comfort-focused rooms. The foamed core absorbs more impact, translating to a softer feel underfoot and better sound attenuation between storeys. In multi-level American homes, that acoustic benefit reduces footfall noise for rooms below. For long hours standing in a home office or bedroom, WPC provides noticeable fatigue relief compared to the harder SPC surface.

Basements and Below-Grade Spaces

US basements in the Midwest and Northeast face temperature swings and moisture seepage through foundation walls. SPC’s lower thermal expansion coefficient means fewer gaps during heating season. Its rigid structure handles uneven concrete slabs without telegraphing defects through the plank surface.

US Climate Zones and Installation Considerations

Hot-Humid Regions

Florida, the Texas Gulf Coast, Georgia, and the Carolinas see sustained humidity above 60% for much of the year. SPC’s stone core resists the dimensional changes that wood-fibre cores absorb in these conditions. Installers in these regions report fewer call-backs for gapping when using SPC over WPC.

Cold-Winter Regions

In Minnesota, Michigan, New York, and New England, indoor heating drops relative humidity below 30% during winter. SPC planks contract less in dry air, reducing visible gaps after the first heating season. This stability matters for open-plan layouts where long runs of flooring accentuate any movement.

Arid Regions

Arizona, Nevada, Utah, and Colorado face extreme temperature fluctuations — often 40°F or more between day and night. SPC’s mineral-based core handles thermal expansion more predictably than WPC’s foamed core, which can become brittle in low humidity. For desert homes, SPC is the default recommendation.

Side-by-Side Comparison Table