1, the surface moisture content of wooden floor is high or low. High, dry air in the wood floor will lose moisture, cross-section contraction, and the occurrence of warping deformation, low when the wood floor shop after absorbing the air moisture, resulting from the arch.
Fine jojoba concrete or thermal insulation material between wooden joists is not dry, floor laying, the absorption of moisture after the drum, deformation. Do not shop moisture barrier or the floor around the end of the ventilation holes, after the laying of the inner surface moisture can not be discharged in time. Materials to open the end of the floor gap or gap is too small, damp expansion, the surface layer from the drum, deformation.