Floating floor installation in a flat in Gamonal
Installation of laminate floating flooring in a flat in a 1970s block in Gamonal, over a terrazzo floor with unevenness that had to be corrected before laying the first plank.
Context
Gamonal, the most populated neighbourhood in Burgos, with plenty of blocks built between the 1960s and 1980s that reach renovation after decades of use, usually with the original terrazzo still underneath any later flooring.
Common challenge
The terrazzo floor showed several millimetres of unevenness between rooms and a building expansion joint crossing the hallway, on top of the need to let the material acclimatise before installing because of the humidity and temperature swings typical of the Burgos climate.
What we usually do
- Checking the floor planimetry with a laser level and locating the areas with the most unevenness in the living room and hallway.
- Acclimatising the laminate flooring in the flat itself for 48 hours, with the packs opened and kept off the floor, before starting to lay it.
- Applying self-levelling compound to the areas with the most unevenness and rolling out foam underlay as acoustic insulation and to absorb irregularities.
- Laying AC4 laminate flooring Spanish-style with a click system, leaving an 8-10 mm perimeter expansion joint hidden under the skirting board.
- Cutting an intermediate expansion joint in the hallway, matching the building’s structural joint, so the flooring does not work against a fixed point.
- Fitting matching skirting boards and trims at the doorways between rooms.
Usual materials and systems
- 8 mm AC4 laminate flooring with click system
- Polyethylene foam underlay as acoustic base
- Self-levelling compound to correct the original terrazzo unevenness
- Lacquered skirting board and expansion joint profiles
Target result
The flat is left with a uniform floor with no noticeable unevenness underfoot, with the flooring already fitted with the expansion joints needed for normal use of the building, preventing the humidity swings between winter and summer in Burgos from causing creaking or lifting over time.




Practical site notes
- In older blocks in Gamonal it is common to find several millimetres of unevenness in the original floor, so it is worth always budgeting for a planimetry check before giving a closed price.
- Letting the material acclimatise in the home itself before installing greatly reduces the risk of the flooring moving in the first months, especially when installing in winter with the heating just switched on.



