WPC flooring with a glueless click system is one of the fastest floor products to install. But an installer who skips subfloor prep or acclimatization gets defective results. This guide covers the 7 steps that separate an amateur install from a professional one.

Scope of this guide

The terms below are confirmed starting points. The quotation, availability and approved sample govern each order.

1. Subfloor preparation

The subfloor determines the final result. If the subfloor is not flat, WPC flooring will produce creaking, bouncing and premature wear of the locking joints.

  • Concrete: max moisture 2.5% — use vapor membrane if it exceeds the limit
  • Concrete: max flatness deviation 3 mm per 2 m (EN 1972 standard)
  • Existing tile: confirm no loose tiles; fill grout lines with self-leveling compound
  • Wooden subfloor: countersink nails, sand joints, replace soft boards
  • Existing PVC/WPC: can be installed over without demolition if subfloor is flat and dry
  • Never install over carpet — always remove it

2. Material acclimatization

WPC is dimensionally stable, but every composite material expands and contracts with temperature and humidity changes. Acclimatization prevents joints from opening after installation.

  • Minimum time: 48 hours in the installation space
  • Target temperature: 18-24°C
  • Target relative humidity: 35-65%
  • Stack boxes flat, not upright
  • Do not open boxes during acclimatization
  • Do not store near windows with direct sun or heating ducts

3. Tools required

WPC with a click system requires no specialized tools. Most tools are available at any construction hardware store.

  • Jigsaw with fine-tooth blade (for cross cuts)
  • Heavy-duty utility knife for longitudinal profile cuts
  • Spacers and wedges (minimum 6 pairs)
  • Plastic tapping block (never use a hammer directly)
  • Measuring tape, metal ruler and square
  • Laser level or 1.2 m spirit level
  • 50 kg roller to set joints after clicking

4. Laying pattern

The laying pattern affects both aesthetics and stability. The fundamental rule: cross-joints must not align in adjacent rows.

  • Plank direction: parallel to the main light source (window)
  • Staggered joints: minimum 30 cm between adjacent planks (random pattern)
  • First row: mark a straight line with string against the longest wall
  • Perimeter expansion gap: minimum 8 mm at each wall (use spacers)
  • In large installations (>8 m long): include an intermediate expansion joint
  • Cut the last row with the decorative face down on the saw

5. Clicking technique

The most common WPC click system is the angle-bevel system: the plank is inserted at 20-30° and pressed down to the plane. Incorrect technique causes visible gaps or profile damage.

  • Side click: insert the tongue into the bevel at 20-30° and lower gently
  • Head click: use the tapping block to close the cross-joint
  • Never force with a direct hammer — always use the tapping block
  • If a joint won't close: check for dirt in the profile
  • Roll a 50 kg roller over each completed row to set joints
  • Inspect each joint by hand — there should be no lip

6. Finishing and transition profiles

Finishing is what separates a completed install from an unfinished one. Transition profiles cover expansion gaps and switch materials without showing raw edges.

  • Skirting board: nail or screw to the wall, never to the floor (allows floatation)
  • T-profile: at joints between rooms or material changes
  • Reducer profile: at height transitions (WPC to tile)
  • Edge profile: on stairs or exposed edges
  • Perimeter sealing: neutral silicone in wet areas (bathroom, kitchen)
  • Remove spacers 24 hours after completing the installation

7. Common mistakes to avoid

Most warranty claims on WPC flooring come from installation errors, not manufacturing defects. These are the seven most common mistakes:

  • Not acclimatizing the material — joints open within weeks
  • Not using a vapor membrane over concrete — flooring buckles
  • Aligned joints in adjacent rows — non-random pattern
  • Not leaving perimeter expansion gap — flooring lifts at edges
  • Using a direct hammer without a tapping block — damaged profile
  • Installing over carpet — flooring bounces and creaks
  • Not sealing the perimeter in bathrooms — water penetrates through edges