Hello there! Thank you for sharing your thoughts! Please know our vinyl transition pieces should be glued directly to the subfloor using a polyurethane construction grade adhesive such as Titebond FastSet. Please make sure you do not glue the transition directly to the flooring planks so it has the freedom to expand and contract under the Reducer.
You can find more information about installing our transitions here: https://www.calibamboo.com/how-to-install-trim/
If you have any questions, please reach out to us at homedepot@calibamboo.com
Thank you!