In flooring, adhesives appear in two places: in the factory, producing the parquet elements, and on site, installing them on the subfloor. Their requirements differ.
In the factory: joining the layers
In engineered parquet, the top wood layer is bonded to a carrier layer. Hot-press PVAc or water-resistant systems such as EPI are used, and reactive PU on high-speed lines. Layer moisture must be balanced for dimensional stability.
On site: installation
Elastic adhesives are preferred for bonding solid parquet to screed. Wood moves with moisture; a rigid adhesive that cannot follow this movement leads to cracking or lifting.
| System | Advantage | Watch out |
|---|---|---|
| MS polymer | Elastic, solvent-free, easy to clean | Needs moisture to cure |
| 2K PU | High strength, low shrinkage | Mix ratio and pot life |
| Dispersion | Economical | Swelling risk on water-sensitive wood |
Subfloor preparation
- Measure screed moisture; high moisture is the most common cause of bond failure.
- Sand off dust and loose layers and vacuum.
- Apply a suitable primer where needed to even out absorbency.
Conclusion
Speed and water resistance matter most in the factory, elasticity on site. The right choice comes from considering floor type, wood species and ambient conditions together.
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