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Insulating materials utilized in radiant floor heating systems shall be installed such that the manufacturer's R-value mark is readily observable upon inspection.

Related Code Sections

1209.5.2 Hydronic Piping, Insulation Material Marking
Insulating materials utilized in radiant floor heating systems shall be installed such that the manufacturer's R-value mark is readily observable ...
R303.1.2 [RE] General Requirements, Insulation Mark Installation
Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable at inspection. For insulation materials ...
C303.1.2 [CE] General Requirements, Insulation Mark Installation
Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable upon inspection.  For insulation ...
N1101.10.2 [RE] Energy Efficiency, (R303.1.2) Insulation Mark Installation
Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable at inspection. For insulation materials ...
E3802.3.3 Wiring Methods, Locations Exposed to Direct Sunlight
," or shall be covered with insulating material, such as tape or sleeving, that is listed or listed and marked as being "sunlight resistant." [310.10(D)] ...