WAC 51-11R-30311. Table R303.1.3(1) — Default glazed fenestration U -factor

TABLE R303.1.3(1) DEFAULT GLAZED WINDOW, GLASS DOOR AND SKYLIGHT U -FACTOR FRAME TYPE SINGLE PANE DOUBLE PANE Metal 1.20 0.80 SKYLIGHT Metal with Thermal Break a 1.10 0.65 See Table R303.1.3(4) Nonmetal or Metal Clad 0.95 0.55 Glazed Block 0.60 FRAME TYPE SINGLE PANE DOUBLE PANE Metal 1.20 0.80 SKYLIGHT Metal with Thermal Break a 1.10 0.65 See Table R303.1.3(4) Nonmetal or Metal Clad 0.95 0.55 Glazed Block 0.60 a Metal Thermal Break = A metal thermal break framed window shall incorporate the following minimum design characteristics: 1) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft 2 /°F; 2) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and 3) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in 1) and 2) above. a Metal Thermal Break = A metal thermal break framed window shall incorporate the following minimum design characteristics: 1) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft 2 /°F; 2) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and 3) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in 1) and 2) above.