How to Install Laminate Flooring: A Complete Beginner's DIY Guide

Learning how to install laminate flooring is one of the most rewarding DIY projects a homeowner can tackle. Laminate is forgiving, relatively affordable, and designed with the DIYer in mind — but get the basics wrong and you'll be pulling it up within a year. This guide covers everything from subfloor preparation through to finishing touches, so you can lay a floor that looks professional and lasts.

Step 1: Prepare Your Subfloor

The subfloor is the foundation of the entire job. Laminate is a floating floor — it isn't fixed to the subfloor — which means any lumps, dips, or flex beneath it will telegraph straight through to the surface and cause boards to creak, bounce, or crack at the joints over time.

Before you bring a single plank into the room, check the subfloor thoroughly:

• Flatness: Use a long spirit level or straight edge. The subfloor must be flat to within 3mm over a 1.8-metre span. Grind down high spots on concrete; fill dips with a self-levelling compound and allow it to cure fully.
• Moisture: Concrete subfloors must be tested for moisture. Relative humidity at the surface should be below 75% (or 65% if the manufacturer specifies). Use a damp-proof membrane if readings are borderline.
• Timber subfloors: Check for squeaky or loose boards and screw them down. Sand any raised edges flat. If there is significant flex, consider adding additional noggins beneath or laying 6mm plywood over the top.
• Clean: Sweep and vacuum thoroughly. Grit and debris beneath the boards can cause movement and noise.

Step 2: Acclimatise the Laminate

Laminate is a wood-based product and it reacts to temperature and humidity. Fit it straight from a cold van into a warm room and the boards will expand after installation — forcing joints apart or buckling. This is one of the most common and entirely avoidable causes of laminate failure.

Stack the unopened boxes flat in the room where they will be laid for a minimum of 48 hours — 72 hours is preferable in rooms that fluctuate significantly in temperature, such as conservatories or rooms that have been unheated. The room should be at its normal living temperature, typically between 18°C and 22°C, with normal humidity levels.

Step 3: Choose and Lay Your Underlay

Underlay performs three jobs: it smooths out minor subfloor imperfections, provides thermal insulation, and reduces impact sound. Many laminate boards now come with underlay pre-attached to the back. If yours does, do not add a separate underlay on top — that introduces too much give and will stress the locking joints.

If your boards have no built-in underlay, select a separate product appropriate for your subfloor:

• Concrete subfloor: Use an underlay with a built-in damp-proof membrane (DPM), or lay a polythene DPM (minimum 250-micron) separately first, overlapping joins by 200mm and taping them.
• Timber subfloor: A standard foam or fibre underlay is sufficient. No DPM is required unless there is a known moisture issue.
• Underfloor heating: Use an underlay with a low tog rating (typically 0.15 tog or below) to allow heat transfer. Check the laminate manufacturer's guidance, as not all laminate is suitable for use with underfloor heating.

Lay the underlay with joins butted — not overlapped — and tape them. Run it up the walls slightly; you will trim it back once the floor is down.

Step 4: Plan Your Layout

Rushing into laying without planning the layout is where many beginners waste material and end up with a floor that looks wrong. Two things to plan before you cut a single board:

Direction: Boards should generally run parallel to the longest wall or towards the main natural light source (a window or patio door). Running boards perpendicular to incoming light highlights the joints and rarely looks as good.

Row width: Measure the room width and calculate how many full board widths will fit. If the final row will be less than 50mm wide, adjust your starting row. Cut the first row narrower so the last row finishes at a workable width — ideally at least half a board's width. Thin slivers against the wall look poor and are difficult to fit.

Step 5: Maintain the Expansion Gap

Laminate must never be fixed tightly against walls, door frames, or any fixed object. It needs room to expand and contract with changes in temperature and humidity. The standard expansion gap is 8–10mm around the entire perimeter of the room, including around door frames, pipes, and hearths.

Use plastic spacers pushed against the wall to maintain a consistent gap as you work. Remove them as you go once the boards alongside them are locked in place. Forgetting the expansion gap — or removing spacers too early — is one of the single most common mistakes in laminate installation and will cause the floor to buckle in warm weather.

Step 6: Lay the Boards — Click-Lock Technique

Most modern laminate uses a click-lock (also called Uniclic or angle-lock) system. The boards connect along their long edges and short ends without glue.

• Start in the left-hand corner of the room (with your back to the starting wall), tongue side facing you.
• Angle the board at roughly 20–30 degrees, engage the tongue into the groove of the previous row, then push down flat to lock it. You should hear and feel a distinct click.
• Use a tapping block on the short end joins to close gaps between boards in the same row. Never tap directly on the board — always use the block to protect the locking profile.
• At the end of each row, use a pull bar hooked over the board's edge to close the final board against the wall without damaging the profile.
• Stagger end joints by at least 300mm between rows. Avoid H-joints (where end joints align across two adjacent rows).
• Do not tap too hard. Firm, controlled taps are all that is needed. Aggressive hammering will crack or deform the locking profile and leave you with gaps that cannot be closed.

Step 7: Cut Around Door Frames and Architraves

Rather than cutting the boards to fit around the profile of a door architrave — which rarely produces a clean result — undercut the architrave so the board slides beneath it. Use a hand saw laid flat on a scrap piece of board (plus the underlay thickness) as a guide to cut the architrave at exactly the right height. The board then slides cleanly underneath, leaving no visible gap.

For cuts around pipes, measure and mark the centre of the pipe on the board, then drill a hole 16–20mm larger than the pipe diameter to accommodate both the pipe and the expansion gap. Cut the board across the centre of the hole so you can fit it around the pipe, then glue the offcut back in place. Use a matching pipe cover rose to finish.

Step 8: Finishing — Skirting Boards or Beading

Once the floor is fully laid, remove all spacers and trim the underlay flush with the board surface using a sharp knife. You then need to cover the expansion gap around the perimeter. You have two options:

• Skirting boards: If you have removed the existing skirting, refit it on top of the floor. The skirting covers the gap and pins against the wall — never fix it to the floor itself.
• Scotia or beading: If the existing skirting is staying in place, pin a thin strip of scotia or quadrant beading to the skirting board (not the floor) to cover the gap. Again — fix to the wall or skirting only, never to the laminate.

At doorways, use a suitable threshold strip to transition between rooms or floor types, allowing for the expansion gap on both sides.

Common Beginner Mistakes to Avoid

• Tapping too hard: Damages the locking profile and creates permanent gaps. Use controlled taps with a proper tapping block.
• Forgetting or reducing the expansion gap: The floor will buckle. Maintain 8–10mm at every fixed object — walls, pipes, door frames, and hearths.
• Laying boards in the wrong direction: Always run parallel to the main light source or the longest wall. Running boards across the light source makes joins far more visible.
• Skipping acclimatisation: Boards will expand after fitting if they haven't adjusted to the room's conditions, forcing joints open or causing the floor to lift.

Key Takeaways

• Subfloor preparation is non-negotiable. A flat, dry, clean subfloor is the difference between a floor that lasts a decade and one that creaks and fails within a year.
• Always acclimatise for a minimum