Patent ID: 7818941

Claim:
A method for creating at least a partially enclosed space and controlled environment for abatement of physical material within a preexisting structure, the enclosed space being based at least in part on structural elements of the preexisting structure comprising: attaching at least first and second barrier sheet lengths comprising separate lengths of flexible polymeric film in a sealed overlapping relationship to one another to a first surface of a first structural element of the preexisting space and attaching the overlapping barrier sheet lengths to a second surface of a second structural element of the preexisting space while at least partially covering an opening between the first and second surfaces for creating a barrier as part of an enclosure of a desired space with a controlled environment, said step of attaching at least the first and second barrier sheet lengths including using a holding system of each of the first and second barrier sheet lengths that extends over major surfaces thereof, wherein the holding system comprises an adhesive layer that substantially covers a major surface of each of the first and second barrier sheet lengths including an edge zone and an intermediate zone of the same major surface, so that the first barrier sheet length with the holding system is secured to the first surface of the first structural element at both the edge and intermediate zones and the second barrier sheet length with the holding system is adhesively sealed to an overlapping portion of the first barrier sheet length and the first surface of the first structural element.