I'm tearing out some floors in a building that was a daycare, and in the
there was the commercial grade vinyl tile installed on a plywood subfloor
what appears to be ordinary 15# roofing felt as underlayment. I couldn't
what adhesives were used. Considering the abuse this floor no doubt went
the plywood (and the vinyl flooring, for that matter) is in remarkably good
condition. Anybody ever heard of
glueing tile onto felt?