Thank you very much for the detailed explanation. I was encouraged and wished to do the SPC floor by myself following your instruction). After I remove the carpet of my living room, I found out there is gap between the skirting board and the floor (cement currently). the gap has both horizontal and vertical dimension. I am concerned that even I would use spacer to fix the floor when I do the installation, the floor will not be stable after I remove the spacer and use beaning (because of the depth (i.e. horizontal dimension into the wall)). I am wondering whether you even experienced such case and what solution I would use to deal with this?