THE BEST SIDE OF ALUMINIUM FOIL INSULATION

Joints of duct programs shall be manufactured considerably airtight by way of tapes, mastics, liquid sealants, gasketing or other authorised closure techniques. Closure methods utilised with rigid fibrous glass ducts shall comply with UL181A and shall be marked181A-P for strain-sensitive tape, 181A-M for mastic or 181 A-H for heat-sensitive tape. C