You can glue down T-molding directly to certain subfloors using heavy-duty construction adhesive, polyurethane adhesive, or specialized flooring glue, provided the installation conditions support it. However, gluing a T-molding directly across a floating floor expansion gap requires careful execution to ensure the molding does not restrict the natural movement of the surrounding flooring, which could cause buckling. When installing over concrete, gluing down the mounting track first is the preferred method, but gluing the molding directly to the subfloor or tracking channel is common in specific remodel scenarios.
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