A moisture barrier is required under the PVC floor on the concrete.
It is important to ensure that the ground meets certain conditions before laying PVC flooring, including the degree of dryness. If the concrete subfloor is not dry, a moisture barrier must be installed to prevent moisture from penetrating. This is because moisture or water may cause damage to PVC flooring, affecting its lifespan and performance. In addition, the installation of a moisture barrier can effectively prevent ground moisture from causing damage to PVC flooring, ensuring stability and durability of the floor. Therefore, checking and ensuring that the ground is dry is an important step before laying PVC flooring, and a moisture barrier should be installed if necessary to achieve this goal.
If PVC flooring has a plastic film on the back, it is usually not necessary to lay a moisture barrier. However, in special cases, such as a basement or a humid environment, it is recommended to lay a special moisture barrier.
The Meaning of Plastic Film On the Back of the Floor
First, we need to explain the plastic wrap on the back of the floor. This kind of floor has a layer of plastic film, which is directly in contact with the ground during installation, which can effectively isolate the ground moisture and avoid deforming, mildew, other problems etc.
2. Do We Need to Lay Another Layer of Moisture Barrier?
If the floor has a plastic film on the back, does it need an additional moisture barrier? The answer is generally no.
Because the plastic film of this floor has played a role in blocking moisture, there is no need to lay a moisture barrier. If you lay a moisture-proof course again, the tightness between the floor and the ground will be affected, which may cause problems such as floor deformation.
However, if your home is in a basement or humid environment, we recommend that you use a special moisture barrier. This can avoid moisture intrusion more effectively and ensure the stability and service life of the floor.
3. Paving Precautions
When paving the floor, you need to pay attention to the following points:
- Do not lay the PVC floor directly on the concrete ground, you can lay a thin layer of wood or moisture-proof film first to increase the buffer layer between the floor and the ground.
- According to the requirements of the PVC/SPC floor laying direction, splice the floor together to ensure the tidiness and beauty of the floor.
- During the paving process, keep the ground dry and flat to avoid uneven or uneven ground, which will adversely affect the stability of the floor.
4. Summary
In the case of plastic film on the back of the floor, it is generally not necessary to lay a moisture-proof course. However, in some special cases, such as basements or humid environments, it is recommended to lay a special moisture barrier again. When paving the floor, keep the ground dry and level, and splice the floor according to the laying direction.
