An adaptive coupling and method for joining a conduit to a barrier sheet through which the conduit passes are disclosed. The barrier sheet is movable axially relative to the conduit. A tubular member and an extensible boot are configured to allow passage of a portion of the conduit through an entirety of each. The tubular member is sealably joinable to the sheet and is sealedly joined to the extensible boot such that the first end of the extensible boot is movable in unison with the tubular member. The second end of the extensible boot is sealably and fixably joinable to the conduit such that the first end of the extensible boot is movable axially relative to the second end of the extensible boot when the tubular member moves axially. A substantially leakless seal is formed between the barrier sheet and the conduit.