The flatness of the base wall should be within 4mm.

2. The surface of the base must be firmly bonded, free from hollow spots, weathering, dirt, coatings, and other substances or quality defects that affect bonding strength.
 

3. If the base wall is leveled with 1:3 cement mortar, a special test should be conducted on the bonding strength between the adhesive mortar and the base wall.
 

4. Ensure that the bonding adhesive does not contain sand, accelerators, antifreeze agents, polymers, or other additives.
 

5. The cutting of integrated insulation and decoration boards should use standard sizes as much as possible.
 

6. Upon arrival of the finished insulation and decoration boards, acceptance should be conducted before construction to ensure compliance with requirements.
 

7. The adhesion of the finished insulation boards should use the dot frame method, and the area of the adhesive applied should not be less than 30% of the total area of the insulation board.