Laminate flooring is the most widely installed floating floor type in Polish apartments and houses. It is dimensionally stable, relatively resistant to wear, and does not require adhesives or nails — making it practical for DIY installation in a standard room. This guide covers the complete process from subfloor assessment through to fitting the final skirting board profile.
The process described assumes a standard modern laminate panel with a click-lock (Uniclic or equivalent) joint system over a concrete screed subfloor, which is the typical configuration in Polish residential construction.
1. Assess the Subfloor
Laminate flooring does not tolerate an uneven subfloor. The maximum acceptable deviation under a 2 m straightedge is 3 mm for most laminate products — some manufacturers specify 2 mm. Measure your floor using a straight piece of timber or a purpose-made straightedge.
In Polish apartment buildings, concrete screeds often show local dips or ridges near doorways, along walls, or at pipe chases. Depressions up to 5 mm can be filled with a self-levelling compound (masa samopoziomująca). For larger areas or more significant deviation, a full floor levelling application is needed.
Moisture check: Concrete screeds in Poland are frequently laid over in-floor heating pipes (ogrzewanie podłogowe). Before laying any floating floor, measure the moisture content of the screed using a carbide pressure test (CM test) or calibrated electronic meter. Standard laminate requires moisture content below 2.5% CM by mass. New screeds typically need 4–6 weeks per centimetre of thickness to dry sufficiently.
2. Acclimatise the Flooring
Laminate panels must acclimatise to the room's temperature and humidity before installation. Leave the sealed packs flat in the room — not stacked on their ends — for a minimum of 48 hours. Room temperature should be between 15°C and 25°C, and relative humidity between 40% and 65%.
This step is particularly relevant in Poland's continental climate: rooms that have been unheated through winter and are rapidly heated before renovation can have significant humidity variation between the subfloor surface and the room air.
3. Lay the Underlay
Underlay performs three functions: slight load distribution over minor subfloor irregularities (up to the manufacturer's specified tolerance), acoustic damping (impact sound reduction), and — critically in Poland — moisture vapour retardation over concrete subfloors.
For concrete substrates, use a combined foam-and-vapour-barrier underlay, or lay a separate 0.2 mm polyethylene film first, lapping it 200 mm up walls and overlapping seams by 200 mm, taped with PE tape. Standard foam-only underlay without a vapour retarder is not suitable over concrete, particularly in ground-floor flats.
Underlay strips are laid in the same direction as the planned plank direction. Do not overlap — butt the edges tightly and tape with underlay tape. Folding the underlay up the wall edge simplifies trimming after the floor is laid.
4. Planning the Layout
Before the first plank goes down, calculate the layout to ensure the last row is not narrower than 50 mm (or half a plank width, whichever is smaller), and that the first row is not significantly narrower either. Measure the room width perpendicular to the planned plank direction, divide by plank width, and assess the remainder.
Planks are typically laid parallel to the longest wall or parallel to incoming light (from the main window). In long, narrow rooms, laying planks along the length makes the room appear wider.
Mark working lines
Snap a chalk line parallel to the starting wall at the exact width of the first row (accounting for the expansion gap). This gives a straight reference regardless of whether the wall is perfectly straight.
5. Installing the Planks
Set the expansion gap
Insert plastic spacers (8–12 mm depending on room size and manufacturer specification) against every wall and fixed obstacle before laying the first row. This gap accommodates dimensional movement with humidity change and must be maintained throughout the installation.
Lay the first row
Place the first plank groove-side toward the wall (tongue pointing out into the room). Work left to right. Lock the short-end joint of the second plank into the first at a slight angle, then lower flat. Check alignment with your chalk line.
Stagger end joints
End joints in adjacent rows must be offset by at least 300 mm — most manufacturers specify a minimum stagger of 400 mm for structural reasons. The off-cut from the end of each row starts the next, provided it meets the minimum stagger and minimum length requirements (typically 300 mm).
Tapping technique
Use a tapping block (supplied with most premium laminate packs, or purchased separately) and a rubber mallet. Never strike the plank directly. For the last plank in a row at the wall, use a pull bar. Avoid forcing joints — misaligned planks can chip the locking profile.
Cutting around obstacles
For door frames and pipe collars: use a jigsaw or oscillating tool. For door frames, use a piece of laminate as a height guide and undercut the frame with a flush-cut saw so the floor slides beneath rather than butting up against it. Pipe collars (rozety) hide the expansion gap around heating pipes.
6. Last Row and Transitions
Measure the last row individually — most rooms are not perfectly parallel — and rip planks to width using a circular saw or track saw with the good face down (or use masking tape on the top face to prevent chipping). Use a pull bar to engage the last row's long-side joint without a mallet.
Door thresholds (listwa progowa) cover the expansion gap between the laminate and the floor in the next room. Select the type that matches the height difference:
- T-profile: Same-height connection between two floating floors.
- Reducer: Transition from laminate to a lower floor (e.g. tiles).
- End profile: Terminates the floor at a door step or balcony threshold.
7. Skirting Boards and Finishing
Remove and refit existing skirting boards after the floor is laid, or cover the expansion gap with new skirting. In Polish renovations, MDF skirting with a painted finish or PVC click skirting is most common. Fix skirting to the wall only, never to the floor — this preserves the floating action.
Remove all spacers before fitting skirting. Where pipes exit through the floor near walls, cut a notch in the skirting rather than in the floor plank.
Underfloor heating: If the room has ogrzewanie podłogowe, use laminate rated for underfloor heating use (typically marked with the underfloor heating symbol on the packaging). Maximum floor surface temperature for most laminate is 27°C. After installation, bring the heating up gradually over several days rather than switching to full output immediately.
8. Common Mistakes
- Skipping the moisture check: Laying laminate over a damp screed causes the panels to swell, buckle, and delaminate within weeks.
- No expansion gap at obstacles: Door frames, heating pipes, steps, and columns all need a gap — not just perimeter walls.
- Insufficient underlay for in-floor heating: Standard thick foam underlay acts as an insulator and reduces heating efficiency; use thin (2–3 mm) laminated underlay rated for UFH.
- Fixing skirting to the floor: This prevents the floor from floating and leads to joint failure in the panels.
- Short end joints: Pieces shorter than 300 mm at row ends are structurally weak and increase the visible number of joints.