We have a butcher block countertop that shrinks and expands 1/8"to 1/2" each season. Right now (dry winter), the countertop has pulled away from the wall, leaving an ugly gap. The installer used a white grout that is a ragged mess. We want to install a tile backsplash on the wall behind the countertop, but we don't know what to do where the tile and butcher block meet. If we grout the line where the tile ends, the butcher block won't be able to expand and contract. If we leave a gap, crumbs, etc. will get in. We would welcome any suggestions.