Howdy all, wondering if anyone has some ideas here... We installed VCT in a small commercial space. The floor is OSB over wood joists so we stiffened it up with backer board since the area is used for storage and they'll be moving materials around on pallet jacks. There's a slight hump at the backer board seams where we taped them and the VCT is either cracking or popping up there - cracking if the tile goes across the seam and popping up if the tile edge aligns with the seam. How would you adhere the VCT over the seams or prevent cracking? We heated the tile at install so it would mould to the subfloor and we ran a roller over it.