Whether SPC floor paving must be self-levelled depends on the specific situation of the ground and the installation requirements of SPC floor. Here's a closer look at the problem:

First, SPC floor pavement before the ground requirements

1. Floor type: SPC floor can be installed on a variety of ground types, including cement concrete base, tile base, wood floor base, etc. Different ground types require different treatments.

2. Ground strength: The ground should be solid and firm, not sand, not empty, not cracking.

3. Ground humidity: The ground humidity should be less than 4.5%.

4. Ground smoothness: Ground smoothness is one of the key factors of SPC floor paving. In general, the ground flatness is required to be less than 2mm in the range of 2 meters (it is also said that it is less than 3mm).

5. Ground cleanliness: The ground must be clean and free of oil, dust and other residues.

Second, the role and necessity of self-leveling

Self-leveling is a ground treatment technology that can flow and fill the bumps and voids on the ground surface to make the ground surface even and flat. For the paving of SPC floor, self-leveling treatment has the following functions:

1. Fill the uneven defects of the ground: self-leveling can fill the defects of the ground, such as bumps and holes, ensure the flatness of the ground, and make the floor laying more smooth.

2. Strengthen the ground strength: self-leveling can improve the strength of the ground and reduce the problems such as cracking and deformation when the ground is stressed.

3. Improve the impermeability and wear resistance of the ground: self-leveling treatment can improve the flatness of the ground surface, and then improve the impermeability and wear resistance of the ground.

Third, SPC floor paving must be self-leveling

1. For ordinary cement concrete base, if the ground flatness meets the requirements (the height difference within 2 meters is less than 2mm or 3mm), and there are no serious bumps and holes, you can directly pave the SPC floor without self-leveling treatment.

2. For the ceramic tile base and wood floor base, if the ground flatness does not meet the requirements, or there are problems such as damage and arch, you need to carry out leveling treatment. Leveling can choose self-leveling or other suitable leveling materials.

3. If the ground conditions are poor, the flatness can not meet the installation requirements of the SPC floor, or the ground strength, impermeability, wear resistance have high requirements, then the self-leveling treatment is necessary.

In summary, whether SPC floor paving must be self-leveling depends on the specific situation and installation requirements of the ground. If the ground flatness meets the requirements and there are no other serious problems, it is not necessary to carry out self-leveling treatment; If the ground conditions are poor or there are special needs, self-leveling treatment is needed to ensure the quality and service life of the floor.