Vapor barrier ceiling seal apparatus

1. A device for an opening in a vapor barrier membrane interior to a ceiling of a building structure, the device comprising:

a flexible enclosure configured to seal an opening in the vapor barrier membrane, wherein the enclosure comprises:

an integrally walled cavity configured to encompass a ceiling mounted electrical device, and

a planar member having an aperture in a planar surface thereof sized to surround the membrane opening, the planar member projecting outwardly from the walled cavity;

a flange fixed substantially parallel to the planar member and extending in an inward direction from the planar member's outer perimeter; and

a fastener joined to an outer surface of the flange for bonding with an interior surface of the membrane.

2. A device for an opening in a vapor barrier membrane interior to a ceiling of a building structure, the device comprising:

a flexible enclosure configured to seal an opening in the vapor barrier membrane, wherein the enclosure comprises:

an integrally walled cavity configured to encompass a ceiling mounted electrical device, and

a planar member having an aperture in a planar surface thereof sized to surround the membrane opening, the planar member projecting outwardly from the walled cavity;

a flange fixed to the planar member and extending in an inward direction from the planar member; and

a fastener joined to a surface of the flange for bonding with an interior surface of the membrane;

wherein the flange comprises a portion spaced from and parallel to the planar member to form a channel configured to engage an electrical device mounting structure.

3. A device as recited in claim 2 , wherein the fastener comprises a removable release liner covering an adhesive.

4. A device as recited in claim 2 , wherein the enclosure comprises at least one access site for introducing an electrical wire from outside the enclosure to the electrical device within the cavity.

5. A device as recited in claim 2 , wherein the planar member comprises an extending portion configured for attachment to a ceiling joist.

6. A device as recited in claim 5 , wherein the wall cavity is generally rectangular in cross-section, the enclosure configured to fit between adjoining ceiling joists.

7. A device as recited in claim 6 , wherein a first side of the rectangular enclosure corresponds to a first standard joist spacing and a second side of the rectangular enclosure corresponds to a second standard joist spacing.

8. A device as recited in claim 2 , wherein the flange extends beyond an inner perimeter of the planar member.

9. A device as recited in claim 8 , further comprising a bracket in engaging relationship with the flange portion, the bracket configured to support electrical device mounting structure.

10. A device as recited in claim 9 , further comprising a retainer coupled to the bracket for retaining the electrical device mounting structure to the flange portion.

11. A device as recited in claim 10 , wherein the fastener comprises a removable release liner covering an adhesive.

12. A device as recited in claim 2 , further comprising:

a bracket in engaging relationship with the flange portion within an inner perimeter of the planar member, the bracket comprising a portion generally orthogonal to the planar member; and

a collapsible superstructure coupled to the orthogonal portion of the bracket; wherein the superstructure is configured to support the enclosure.

13. A device as recited in claim 12 , the collapsible superstructure comprises:

a plurality of u-shaped support arms having ends thereof rotationally connectable with the orthogonal portion of the bracket; and

at least one cross bar having ends configured to engage respective support arms.

14. A device as recited in claim 13 , wherein the support arms comprise grooved portions configured to receive the cross bar.

15. A device as recited in claim 14 , wherein the cross bar ends comprise detent portions configured to limit rotation of the support arms for locking the support arms to positions generally orthogonal to the membrane opening.

16. A device as recited in claim 12 , wherein the fastener comprises a removable release liner covering an adhesive.

17. A device as recited in claim 12 , wherein the enclosure comprises at least one access site for introducing an electrical wire from outside the enclosure to the electrical device within the cavity.

18. A device as recited in claim 12 , wherein the planar member comprises an extending portion configured for attachment to a ceiling joist.