Thermal insulation

Claim 1

AN IMPROVED THERMAL INSULATION WHICH COMPRISES AT LEAST TWO INSULATING SHEETS OF INDEFINITE LENGTH AND FORMED OF THIN FLEXIBLE MATERIAL INCLUDING ALUMINUM FOIL, TWO SUPPORTING EDGE STRIPS OF SHEET MATERIAL WHICH ARE RELATIVLEY NARROW WITH RESPECT TO THEIR LENGTH AND WITH RESPECT TO THE INSULATING SHEETS, SAID EDGE STRIPS BEING RELATIVELY STIFF COMPARED TO THE INSULATING SHEETS, SAID INSULATING SHEETS HAVING THIN EDGE PROTIONS BENT AT RIGHT ANGLES FORMING LATERAL EDGE PANELS WHICH ARE ATTACHED TO THE EDGE STRIPS, SAID EDGE STRIPS FORMING MEANS FOR HOLDING THE INSULATING SHEETS IN SPACED APART RELATION WHEN THE INSULATION IS INSTALLED BETWEEN FRAMING STRUCRURES, AND ONE ATTACHING PANEL FORMED LENGTHWISE ALONG THE LONGITUDINAL EDGE OF EACH EDGE STRIP PROVIDING MEANS FOR ATTACHING INSULATION TO A FRAMING STRUCTURE WITH THE REMAINING MAJOR PORTION OF THE EDGE STRIPS UNATTACHED, SAID INSULATING SHEETS COMPRISING A FRONT SHEET AND A BACK SHEET, THE SPANNING WIDTH OF THE FRONT SHEET BETWEEN THE EDGE STRIPS BEING WIDER THAN THE SPANNING WIDTH OF THE BACK SHEET BETWEEN THE EDGE STRIPS, WHEREBY WHEN THE EDGE STRIPS ARE PLACED IN CONTACT WITH THE INNER OPPOSITE PARALLEL FACES OF TWO FRAMING STRUCTURES AND THE ATTACHING PANEL OF EACH EDGE STRIP IS ATTACHED TO A FRAMING STRUCTURE THE EDGE STRIPS HOLD THE INSULATING SHEETS IN STRETCHED TAUT POSITIONS, THE EDGE STRIPS BEING SUFFICIENTLY STIFF THAT ALTHOUGH THEY BEND INWARDLY AWAY FROM THE FRAMING STRUCTURES AT THEIR UNATTACHED PORTIONS THEY HOLD BOTH INSULATING SHEETS TAUT.