High Quality WPC Flooring Click Lock PE/PP Wood Plastic Composite Floor Tiles

WPC Wood-Plastic Composite Flooring Installation Guide

This is a clear, practical and ready-to-use installation guide for WPC wood-plastic composite flooring, divided into two most common methods for indoor click-lock type and outdoor square/round hole type. You can follow these steps with almost no mistakes.

I. Installation of Indoor WPC Click-Lock Flooring (Most Commonly Used)

Suitable for home use, balconies, kitchens, bathrooms – no glue or nails required.

1. Preparations

Floor requirements: Flat, dry and clean, with a height difference ≤2mm/2m

Ambient temperature: 15–30℃ is optimal; leave the flooring indoors for 24 hours in advance to acclimatize to the temperature

Essential tools: Tape measure, pencil, cutting machine, rubber mallet, shims, utility knife

2. Basic Steps

Lay moisture barrier film

Fully cover the floor with a moisture barrier mat, overlap by ≥20cm, and turn up 2–3cm along the walls.

Leave expansion gaps

An expansion gap of 8–10mm must be left around all walls, door frames and columns to prevent heaving and deformation caused by thermal expansion and contraction.

Lay the first row

Place the flooring with the groove side against the wall and the tenon side facing outwards

Put expansion shims between the planks and the wall

Stagger the planks along the length for a more aesthetic and stable finish

Join the click-lock system

Tilt the new plank at 30° and insert it into the click-lock of the previous plank

Flatten it and tap firmly with a rubber mallet to lock in place

Measure and cut the last plank to size, leaving an expansion gap as well

Finishing touches

Install baseboards to cover the expansion gaps

Use transition strips for edge finishing at doorways

II. Installation of Outdoor WPC Flooring (Joist-Fixed Type)

Suitable for patios, courtyards and balcony floors.

1. Basic Structure

Floor → Joists → WPC Flooring

Common joist materials: Galvanized square steel, preservative-treated wood, aluminum alloy joists

Joist spacing: 30–40cm (closer spacing for greater stability)

2. Installation Steps

Level and fix the joists to keep them horizontal

Lay the WPC flooring on the joists, leaving a 3–5mm gap between planks for drainage and heat dissipation

Secure with stainless steel hidden clips/stainless steel screws

Fasten at least one point per joist for each plank

Leave a 10–15mm expansion gap around the perimeter

Use edge trim for end finishing

III. Key Notes (Extremely Important)

Expansion gaps are a must

WPC flooring expands and contracts with temperature changes – failure to leave gaps will definitely cause heaving and deformation.

No full gluing or bonding

Click-lock flooring is secured only by the click-lock system; do not fix it with glue.

Wear a mask when cutting

Wood-plastic composite produces a large amount of dust – take protective measures.

Do not lay directly on soil outdoors

A raised joist frame is a must to ensure ventilation and drainage.

Suitable for underfloor heating

The recommended temperature is ≤55℃, and the click-lock type is more suitable.

If you need, I can also provide:

A simplified graphic version of the WPC flooring installation steps

A concise verbal version for construction workers