Ventilation barrier

A multi-layer barrier for use in insulation blocking an opening or passage of a building and for providing ventilation to or within a building, the improvement comprising:

• a plurality of inflatable hollow membrane cube-like structures formed adjacent to one another which traverse a longitudinal width of the opening or passage of a building;
• the hollow membrane cube-like structures formed from generally rectangular sheets of resilient, flexible material having two generally parallel long edges and two generally short edges at generally right angles to the long edges wherein the multi-layer barrier includes a generally bottom sealing sheet and a plurality of one or more structure sheets, each long edge of a non-bottom structure sheet being longitudinally sealed to an intermediate longitudinal axes of an immediately subsequent non-bottom sheet to form a hollow membrane cube-like structure, and the longitudinal seals on the bottom sheet being generally along the edges of the bottom sheet;
• the longitudinal sealing axes forming the hollow membrane cube-like structures having an outside surface and an inside surface and a floor, the floor of each membrane structure except for the generally most bottom cube like membrane having one or more orifices for air connection between membrane structures to allow the membrane cube-like structures to be transformable between an inflated and a deflated state;
• each of the cube-like membranes having sealed ends and the barrier is adapted to be positioned in a frame comprising horizontal upper and lower supports, two vertical ends and a plurality of vertical supports, the vertical supports are sufficiently spaced and transversely mounted to the upper and lower supports for guiding the barrier during the inflation and deflation process.