| Marmoleum swelling!
I have had a thick cardboard protective cover over my sheet Marmoleum for at least the past 6 months while I have tried to wrap up things on the renovation of my Caravel. After I pulled the cardboard out last week I was horrified to see that I have a few long bubbles or swelling spots running front to back in the middle of the floor!
I glued it only at the perimeter. I am not sure if it was moisture that I tracked in over time, or a leak. I have hoped it would go back down, but after a week there are no signs if it changing.
Any suggestions on how to fix? All I can think of is trying to find a small syringe for the adhesive and drilling small periodic holes, but I am worried about gluing across a plywood seam... | 
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