Thanks Dan for your comment. Glad to hear that your cork flooring is working out after 9 years.
Update on progress - my husband decided to first see if he could bump all the flooring back together (I thought he was going to remove it first to just double-check all is well with sub-floor - husband/wife miscommunication
) He was successful so we are now thinking of just top screwing it in place with flush screws of similar color at the lengthwise joints and leave the ends under baseboard, treads and sofa to expand/contract. It's an experiment - not sure it will work - but if not he's not put a lot of time into it. With the area rugs I use, the screws will hopefully not be that noticeable.
He's convinced it was the cold temperatures and drastic changes in temperatures exhibited this winter. It's the first time we've had the trailer parked all winter long in Vermont. It is high-quality vinyl/cork click lock and was sold to us by a flooring place that recommended it for our climate saying it would not expand/contract much when stored. We brought two extra pieces that are stored in our garage indoors to see how much they expanded and they immediately starting expanding, ultimately to the degree we are experiencing contraction in the trailer. So, we can definitively attest to the fact that this stuff does move around with temperature extremes.
If the "screwing in place" experiment does not work, we will move to replacement. Cork is our next consideration. Did you glue it down? Or is it floating?
Thanks for your input. Much appreciated. Lynn