One of the main reasons why the PVC floor welding rod falls off is the improper installation.

The standard installation of PVC floor welding rod is :make the 2 pieces PVC flooring  fully contacted

Secondly,the temperature of welding machine and movement speed should be proper.

Another reason is damping of ground floor or dissolution of glue,that makes PVC flooring to be pulled and displaced,and the welding rod is all pulled off.

Anyway,Sinocourts would provide you high quality PVC sports flooring and professional service.