How To Install Laminate Flooring

Installing laminate flooring is one of the most consequential decisions a homeowner makes about their interior. Get it right and you have a floor that lasts 15–25 years. Get the preparation wrong and no amount of careful plank placement saves you from buckling, gaps, and noise inside six months.

This guide covers every phase — from buying decisions and subfloor preparation through to the final transition strip. It is the reference page for every installation question this site answers in depth. Each section points you to the article that goes deeper when the topic demands it.

What Is Laminate Flooring, and Why Does the Construction Matter for Installation?

Laminate is an engineered product built in four bonded layers: a backing layer for moisture resistance at the bottom, a high-density fibreboard (HDF) core that gives the plank its structural rigidity, a photographic décor layer printed to mimic wood or stone, and a transparent wear layer on top — rated in AC classes — that protects against scratches, scuffs, and surface abrasion.

Understanding this construction matters because every installation rule flows from it. The HDF core absorbs and releases moisture from the air. When humidity rises, planks expand. When it drops, they contract. The floating installation method — where planks are never fastened to the subfloor — exists entirely to accommodate that movement. Nail it down, glue it to concrete, or block its expansion with a wall and you have created a problem that will reveal itself the first time the seasons change.

Thickness and AC rating are buying decisions that directly affect how you install the floor. Thicker planks require less subfloor tolerance because the additional mass distributes minor unevenness. Higher AC ratings indicate a harder wear surface but do not change the installation method. Before you start laying a single plank, those decisions need to be settled.

If you are still at the specification stage, read our guide on the best thickness for laminate flooring and our breakdown of AC ratings before continuing here.

The Three Methods for Installing Laminate Flooring

Most homeowners encounter one method — click-lock floating — because it now dominates the retail market. But there are three distinct installation systems, and the one you choose affects your tooling, your subfloor requirements, and how the floor can be removed later.

1. Click-Lock Floating (Most Common)

Click-lock, also called fold-and-lock or angle-lock depending on the profile, uses a tongue-and-groove joint engineered to snap together at an angle and then flatten into place. No adhesive touches the subfloor. The floor moves as a single connected unit on top of the underlayment. This is the correct method for the vast majority of residential installations over wood or concrete subfloors.

2. Tongue-and-Groove Glued

Older laminate products — and some specialty applications — use a traditional tongue-and-groove profile where PVA adhesive is applied to the joint, not to the subfloor. The floor still floats, but the adhesive locks planks together permanently. This method is far less common today and makes future repairs significantly harder.

3. Glued-Down (Rare)

A small number of laminate products are designed to be glued directly to the subfloor, particularly in commercial applications or where stability in high-humidity environments is the priority. This eliminates the floating movement entirely and requires a perfectly flat substrate. If you are considering this method, read our comparison of glued-down vs floating laminate first, because the subfloor preparation requirements are substantially different.

For a full comparison of all three systems including which situations call for each, see our dedicated guide to the 3 methods to install laminate flooring.

Tools You Need Before You Lay a Single Plank

The quality of a laminate installation is determined before the first plank is placed. Having the right tools does not just make the job easier — it prevents the specific damage that turns a DIY project into a costly repair.

The core toolkit for a click-lock floating installation:

• Tape measure and chalk line — for establishing a straight reference row
• Spacers (at least 20) — to maintain the expansion gap at every wall and fixed object
• Tapping block — protects the joint profile when closing seams; never strike the plank edge directly
• Pull bar — for driving the last plank in each row where a tapping block cannot reach
• Rubber mallet — used with the tapping block; a standard hammer transfers too much force
• Circular saw or mitre saw — for cross-cuts; when cutting face-up, use a fine-tooth blade
• Jigsaw — for notching around door casings, pipes, and radiator feeds
• Utility knife — for scoring and trimming underlayment
• Moisture meter — non-negotiable for concrete subfloors and important for wood
• Long spirit level or 10-foot straightedge — to measure subfloor flatness
• Safety glasses and dust mask — cutting laminate generates fine particulate dust

The tools list becomes longer on more complex jobs. If you are fitting around a staircase, working in multiple rooms, or dealing with an unusual subfloor, see our full breakdown of what tools you need to lay laminate flooring.

Subfloor Preparation: The Phase That Determines Everything

Subfloor preparation is not a preliminary step. It is the installation. Every problem that appears in a laminate floor after the job is done — the buckling, the hollow sound underfoot, the gaps that open between planks — can almost always be traced back to something that was missed or accepted during the subfloor phase.

The specification that governs every subfloor is this: no more than 3/16 of an inch variation over a 10-foot span, or 1/8 of an inch over a 6-foot span. Anything outside those tolerances creates stress concentrations at the locking joints that will, over time, either force the joints apart or cause the wear layer to crack at the peaks.

Concrete Subfloors

Concrete is the most demanding subfloor because it combines two separate problems: surface irregularity and moisture vapour transmission. A concrete slab that looks flat can still push enough moisture vapour upward to destroy a laminate floor from underneath. That moisture does not need to be liquid — the vapour pressure alone is sufficient to cause the HDF core to swell.

The process for preparing a concrete subfloor:

1. Test moisture using a calcium chloride test or an in-situ probe. The result must be below 75% relative humidity (or per the manufacturer specification). Do not skip this step based on how the slab looks or feels.
2. Grind down any high spots. A concrete grinder with a diamond cup wheel removes raised sections efficiently. Self-levelling compound fills low areas — pour it, spread it, and allow full cure time before proceeding.
3. Install a moisture barrier. On concrete, this is not optional. The barrier sits between the slab and the underlayment and breaks the vapour transmission pathway.

For the specific products and methods that work on concrete, read our detailed guide on what to put on a concrete floor before laminate installation. For the moisture protection question specifically, our guide on moisture barriers for concrete floors covers the full range of options.

Wood Subfloors (Plywood and OSB)

A wood subfloor introduces a different set of variables. The two most common are deflection — the subfloor flexes when walked on — and squeaking from unfastened panels rubbing against joists. Both need to be resolved before laminate goes down because the laminate will neither eliminate nor disguise them.

Check every panel. Walk the entire surface slowly and mark any area that moves, squeaks, or feels soft. Soft spots indicate rot or a structural issue that must be addressed before any floor covering is applied. Squeaking panels can be silenced by driving additional screws — not nails — into the joists. Nails work loose over time; screws hold.

Gaps between panels wider than 1/8 inch need to be filled with floor levelling compound. Any panel with a damaged surface should be replaced rather than patched.

For specifics on installing over plywood, see our guide on laminate flooring over plywood. For OSB specifically — which is now standard in many newer homes — our guide on laminate over OSB subfloor addresses the specific considerations that panel type introduces.

Existing Hard Floors (Tile and Vinyl)

Laminate can be installed directly over existing ceramic tile or vinyl in many cases, but both require specific conditions to be met. Tile must be fully adhered — any loose, hollow, or cracked tiles must be reset or removed and the area levelled. Grout lines deeper than 3mm need to be filled before installation because the laminate planks will eventually follow the contours underneath them and the joint lines will telegraph through.

Acclimation: Why 48 Hours Is Not Optional

Laminate planks arrive from a warehouse that may have been significantly warmer, colder, drier, or more humid than your installation space. The HDF core has already adjusted to those conditions. Place those planks directly into a different environment and they will begin adjusting after installation — expanding or contracting against the walls and against each other.

The solution is straightforward: bring the planks into the installation room, lay them flat in their packaging, and leave them for a minimum of 48 hours. The room should be at normal living temperature and humidity during this period — do not leave a house unheated through winter and then try to acclimate flooring in it. The acclimation environment must match the environment the floor will live in permanently.

One handling detail that is consistently overlooked: do not lean the packs against a wall. Planks stored on their edge can develop a bow in that position that does not fully relax when laid flat. Keep them horizontal.

Underlayment: What It Does and How to Choose It

Underlayment sits between the subfloor and the laminate and performs four functions: it cushions footfall to reduce the hollow sound of a floating floor, it provides thermal insulation, it acts as a final line of defence against moisture vapour (particularly on concrete), and it compensates for very minor subfloor irregularities.

It does not compensate for major irregularities. The common mistake is to use a thick underlayment as a substitute for proper subfloor levelling. It is not. An underlayment that is too thick also creates instability in the click-lock joints because the planks have too much give underfoot, and the mechanical connection between planks weakens over time.

The selection criteria are:

• On concrete: the underlayment must include an integrated vapour barrier, or you must install a separate plastic sheet (6 mil polyethylene minimum) beneath a foam underlayment. Using both a separate barrier and an underlayment with a built-in barrier is not excessive — it is prudent on any concrete application.
• On wood subfloors: a standard foam underlayment is generally appropriate. The moisture barrier layer matters less here, but acoustic performance often matters more.
• Pre-attached underlayment: many laminate products now come with underlayment bonded to the back of the plank. If yours does, do not add a second foam layer — you will create too much compression in the joint system.

For a full comparison of underlayment options by subfloor type, see our guide on the best underlay for concrete to laminate flooring.

Planning the Layout Before the First Plank

Layout planning prevents two problems: ending up with a sliver of plank at one wall that looks unprofessional, and discovering midway through that your starting row was not straight and every subsequent row has drifted.

Direction of the Planks

The conventional guidance — run planks parallel to the longest wall or parallel to the primary light source — is correct for most rooms. In long, narrow rooms the long axis of the plank should run the length of the space; it makes the room appear wider. In square rooms the choice is more flexible.

Calculating Starting Position

Measure the width of the room perpendicular to the direction the planks will run. Divide by the plank width. The remainder is how wide the last row will be. If that number is less than half a plank width, shift the starting row toward the centre so the first and last rows end up roughly equal in width. Both should be at least 50mm wide — a sliver at one wall looks like a mistake.

Establishing a Straight Reference Line

Walls are rarely perfectly straight. Snap a chalk line parallel to the starting wall at a distance of one plank width plus the expansion gap. This line, not the wall, is your reference. Every plank in the first row aligns to this line.

Staggering the Joints

End joints between adjacent rows must be offset by a minimum of 200–300mm (approximately 8–12 inches). This staggering distributes structural load across the floor and prevents a line of weakness from running across the room. Random staggering looks more natural than a consistent pattern. Never start consecutive rows with the cut-off piece from the previous row if it creates a short joint — short joints (under 200mm from the end of the plank) are a common source of joint failure.

Step-by-Step Installation Process

Step 1: Prepare the Room

Remove all furniture. Remove the baseboard or skirting if possible — this allows the expansion gap to be hidden properly. If you are leaving the skirting in place, you will need to use quarter-round moulding or a cover strip to hide the gap at the end. Undercut door casings with a jamb saw so the laminate can slide beneath them rather than butting up to them — this is the cleaner finish.

Step 2: Lay the Underlayment

Roll out the underlayment perpendicular to the direction the planks will run. Butt the edges together — do not overlap, which creates a ridge. Tape the seams with the manufacturer’s recommended tape. If you are using a separate vapour barrier on concrete, lay that first, lapping it 150–200mm up every wall, and then lay the foam underlayment on top. Tape all seams and overlaps in the barrier with barrier tape, not standard masking or duct tape.

Step 3: Place Spacers

Before laying the first plank, set spacers against the starting wall. Maintain an expansion gap of 10–12mm (approximately 3/8 inch) at every wall, door frame, column, pipe, and fixed object throughout the installation. Never reduce this gap. In larger rooms — over 10 metres in any direction — check the manufacturer’s specification because a wider gap may be required.

Step 4: Install the First Row

Place the first plank in the corner with the groove side facing the wall. Connect subsequent planks along the long edge using the angle-lock or fold-down method specified by the manufacturer. Keep the planks tight along their long edges. At the end of the first row, measure the remaining space, subtract the expansion gap, and cut the final plank. The offcut from the end of row one starts row two — provided it is at least 300mm long. If it is shorter, begin row two with a fresh plank cut to an appropriate starting length.

Step 5: Build Each Subsequent Row

Connect the new plank to the previous row at the long edge first, then use the tapping block and mallet to close the short-end joint. The correct sequence — long edge engaged first, then short end driven home — is consistent across nearly all click-lock systems, but check your manufacturer’s instruction because some profiles work in the opposite order.

Check alignment every three or four rows by measuring the distance from a reference point on the starting wall to the front edge of the installed section at several positions across the room. Any drift caught early is easy to correct. Drift caught in row 14 is a major problem.

Step 6: Handle Obstructions

Pipes through the floor require a circular cut slightly larger than the pipe diameter. Drill overlapping holes with a spade bit to create the opening, then cut a small piece of plank to fit behind the pipe and glue it in place with flooring adhesive. Cover the gap with a pipe collar. Door frames that cannot be undercut require careful scribing or template-cutting. For detailed guidance on fitting into and through doorways, see our guide on 7 steps to lay laminate in doorways.

Step 7: Install the Final Row

The last row almost always needs to be cut lengthwise to fit. Measure the gap between the second-to-last row and the wall at several points — walls are rarely parallel — and transfer those measurements to the plank. Use a pull bar to engage the final row because the tapping block cannot reach the wall side. Maintain the expansion gap.

Step 8: Remove Spacers and Install Finish

Remove all spacers. Refit the skirting board or install quarter-round moulding to cover the expansion gap. Fit transition strips at doorways and wherever the laminate meets a different floor covering. Do not caulk the expansion gap — caulk is a rigid filler and eliminates the movement allowance that the gap exists to provide.

The Expansion Gap: Why It Fails and How to Protect It

The expansion gap is the single most violated principle in laminate installation. It is violated in three ways: the gap is left too small, the gap is blocked by a fixed object that was not accounted for, or the gap is filled after installation by something pushed against the wall.

The consequences are predictable. When the planks expand and have nowhere to go, they buckle upward at the weakest point — usually in the middle of the room, away from the walls where the force builds to its maximum. The floor develops a ridge that is initially slight and eventually pronounced. The solution at that point involves removing the skirting, cutting back the perimeter row on the expansion-gap side, and reinstalling. It is avoidable entirely by maintaining the gap throughout the original installation.

Heavy furniture placed directly against the wall so that it pins the floor does the same thing over time. Leave a gap between furniture and the wall, or use furniture feet that allow the floor beneath to move.

For a full explanation of the mechanics behind laminate expansion, see our article on why laminate flooring expands.

Moisture and Vapour: The Silent Enemy of Laminate

Water and laminate flooring have an adversarial relationship. The HDF core, despite any surface treatment, will absorb liquid water and moisture vapour. When it does, it swells. The swelling is not reversible — an HDF core that has been saturated will not return to its original dimensions when dried, and the photographic layer will separate from the core.

The practical implications for installation are these:

• Test the subfloor moisture level before installation, not after a problem appears.
• Install a vapour barrier on concrete without exception.
• Do not install standard laminate in rooms where liquid water is a routine risk — bathrooms, utility rooms with floor drains, or spaces that flood.
• If water resistance is the priority, the correct comparison is between waterproof laminate and waterproof vinyl plank, not between standard laminate options. Our guide on waterproof laminate versus waterproof vinyl covers the difference in construction and performance.

The distinction between a moisture barrier and a vapour barrier is more than terminology. The two products have different permeability ratings and are appropriate for different conditions. See our explanation of the difference between a moisture barrier and a vapour barrier before selecting a product.

Common Problems After Installation and What Causes Them

The problems that appear in laminate floors after installation almost always have a specific cause in the installation process. Understanding the cause tells you whether the problem is structural — requiring reinstallation of the affected area — or surface-level, requiring only a repair.

Buckling and Peaking

The floor rises at a ridge across the room. Cause: the expansion gap was too small or has been blocked. Relief: remove the skirting or moulding and trim back the perimeter planks. If the ridge is severe, the planks may need to be unlocked and re-laid from that point.

Gapping

Gaps open between planks along the long or short edges. Cause: the floor contracted more than expected, usually due to low humidity in the space after installation. Secondary cause: planks were not properly acclimated before installation and arrived from a more humid storage environment. See our detailed guide on how to fix gaps in laminate flooring for repair methods by gap type.

Bubbling or Raised Spots

Individual planks develop raised areas or bubbles in the surface. Cause: moisture has penetrated from below, causing localised swelling of the HDF core. The affected planks cannot be restored — they must be replaced. The source of moisture must be identified and resolved before replacement.

Clicking and Not Locking

Planks click together but feel loose or will not engage fully. This is frequently caused by using a direct hammer blow rather than a tapping block, which can damage the male tongue. It is also caused by debris in the groove. Before forcing a joint, check that both mating surfaces are clean and undamaged. For a systematic diagnosis, see our guide on why laminate flooring won’t click together.

Where Laminate Flooring Should Not Be Used

Laminate is not the right product for every application. The materials science is clear on this: sustained exposure to liquid water destroys the product. The areas where this limitation matters most are bathrooms, rooms with floor drains, and any space that has a history of flooding or water intrusion.

Beyond moisture, high-traffic commercial environments with abrasive soiling — workshops, commercial kitchens, industrial spaces — will exceed the wear rating of even AC5-rated laminate faster than the manufacturer’s projected lifespan. The floor is correctly rated for the testing conditions; actual conditions may be more demanding.

For a full list of installation environments and the specific factors that make laminate inappropriate in each, see our guide on where you should not use laminate flooring.

Frequently Asked Questions

How long does it take to install laminate flooring?

A straightforward rectangular room of 20–30 square metres takes an experienced DIYer four to six hours, not including subfloor preparation time. Subfloor levelling, moisture testing, and acclimation add one to three days before laying begins. Complex layouts — multiple rooms, doorways, stairs, unusual angles — extend both time and the margin for error.

Do I need underlayment if my laminate has it pre-attached?

No. Adding a second foam layer beneath laminate that already has underlayment bonded to it over-compresses the system and can cause joint failure. On concrete, however, you should still install a separate vapour barrier beneath the planks even if the pre-attached underlayment includes a barrier film — the pre-attached barrier is designed as a supplement, not a primary protection layer.

Which direction should I lay laminate flooring?

Run planks parallel to the longest wall in the room and parallel to the primary natural light source. In hallways, run parallel to the direction of travel. In open-plan spaces that connect two differently proportioned areas, choose the direction that serves the largest zone and continue it consistently across the entire space to avoid a visible joint at the boundary.

Can I install laminate over existing laminate?

Generally not recommended. Each layer of flooring raises the finished floor height, which creates transition problems at doorways, affects the fitting of appliances, and can void the new product’s warranty. The existing floor also acts as the subfloor and must meet flatness and firmness tolerances — an existing floating floor rarely does. Remove the existing laminate, inspect and prepare the subfloor underneath it, and install fresh.

How soon can I walk on laminate flooring after installation?

You can walk on a click-lock laminate floor immediately after installation is complete — there is no adhesive curing time. However, allow 24 hours before placing heavy furniture, and avoid wet mopping the floor for 24–48 hours to give any freshly cut edges time to stabilise in the room’s humidity conditions.

What thickness of laminate is best for my project?

8mm is the minimum acceptable thickness for residential installation over a properly prepared subfloor. 12mm provides noticeably better sound dampening, a more substantial underfoot feel, and greater tolerance for minor subfloor imperfections. For a detailed comparison of the trade-offs at different thickness points, see our guide on whether to use 8mm or 12mm laminate.

Summary: The Non-Negotiable Rules of Laminate Installation

Every failure mode in laminate flooring connects to one of five principles. Hold all five and the floor will perform as designed for its rated lifespan.

1. The subfloor must be flat, dry, and structurally sound. No floor covering compensates for a deficient substrate.
2. Test for moisture before laying on concrete. Vapour you cannot see causes as much damage as water you can.
3. Acclimate the planks in the installation room for a minimum of 48 hours. This is not a guideline — it is the condition under which the warranty is valid.
4. Maintain the expansion gap at every fixed object throughout the entire installation. The floor will expand. It must have somewhere to go.
5. Use a tapping block. Never strike a plank edge directly. Damaged joint profiles cannot be repaired without replacing the plank.

The articles linked throughout this guide go deeper into each phase. Use this page as the starting point and the checklist. Use the linked guides for the specifics your project requires.