Reflective-fibrous type insulation

Claim 1

A RESILIENTLY COMPRESSIBLE INSULATING UNIT FOR PROVIDING INSULATION TO A BUILDING STRUCTURE SURFACE CONSISTING OF A COMPRESSIBLE BATT OF INSULATING MATERIAL; AND AN ENVELOPE FOR ENCLOSING THE NORMALLY-OUTER-FACING AND NORMALLY-INNER-FACING SURFACES AND TWO LATERALLY OPPOSED SIDES OF SAID COMPRESSIBLE BATT, SAID ENVELOPE CONSISTING OF A PAPER SHEET SUBSTANTIALLY COMPLETELY COVERING SAID NORMALLY-OUTER-FACING AND TWO LATERALLY OPPOSED SIDES OF SAID BATT AND EXTENDING FROM SAID SIDES ADJACENT THE NORMALLY-INNER-FACING SURFACE OF SAID BATT TO FORM A PAIR OF FLANGES, AN IMPERFORATE METAL FOIL SHEET AFFIXED TO AND SUBSTANTIALLY COMPLETELY COVERING THE NORMALLYINNER-FACING SURFACE OF SAID BATT, THE LATERAL EDGE PORTIONS OF SAID IMPERFORATE METAL FOIL SHEET BEING AFFIXED TO SAID FLANGES OF SAID PAPER SHEET, A STRIP OF PERFORATE METAL FOIL AFFIXED TO AND SUBSTANTIALLY CONTERMINOUS WITH THE PORTION OF SAID PAPER SHEET COVERING SAID NORMALLY-OUTER-FACING SURFACE, SAID PERFORATE METAL FOIL PROVIDING A HEAT-REFLECTIVE SURFACE AND PERMEABLE MEMBRANE FOR THE ESCAPE OF MOISTURE VAPOR ENTRAPPED IN SAID BATT, AND THE PORTIONS OF SAID PAPER SHEET COVERING THE LATERALLY OPPOSED SIDES OF SAID BATT BEING SUBSTANTIALLY FREE AND UNCOVERED BY SAID METAL FOIL SHEETS, WHEREBY THERE IS NO CONTACT BETWEEN SAID PERFORATE AND IMPERFORATE FOIL SHEETS.