WAC 51-11R-40211. Table R402.1.2 — Insulation and fenestration requirements by component

TABLE R402.1.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT a CLIMATE ZONE 5 AND MARINE 4 Fenestration U -factor b 0.30 Skylight U -factor 0.50 Ceiling U -factor 0.024 Above-Grade Wall U -factor 0.056 Floor U -factor 0.029 Slab on Grade F -factor 0.54 Below Grade 2' Depth Wall U -factor 0.042 Slab F -factor 0.59 Below Grade 3.5' Depth Wall U -factor 0.040 Slab F -factor 0.56 Below Grade 7' Depth Wall U -factor 0.035 Slab F -factor 0.50 CLIMATE ZONE 5 AND MARINE 4 Fenestration U -factor b 0.30 Skylight U -factor 0.50 Ceiling U -factor 0.024 Above-Grade Wall U -factor 0.056 Floor U -factor 0.029 Slab on Grade F -factor 0.54 Below Grade 2' Depth Wall U -factor 0.042 Slab F -factor 0.59 Below Grade 3.5' Depth Wall U -factor 0.040 Slab F -factor 0.56 Below Grade 7' Depth Wall U -factor 0.035 Slab F -factor 0.50 a U -factors or F -factors shall be obtained from measurement, calculation, or an approved source or as specified in Section R402.1.5. b A maximum U -factor of 0.32 shall apply to vertical fenestration products installed in buildings located above 4000 feet in elevation above sea level, or in windborne debris regions where protection of openings is required under Section R301.2.1.2 of the International Residential Code . a U -factors or F -factors shall be obtained from measurement, calculation, or an approved source or as specified in Section R402.1.5. b A maximum U -factor of 0.32 shall apply to vertical fenestration products installed in buildings located above 4000 feet in elevation above sea level, or in windborne debris regions where protection of openings is required under Section R301.2.1.2 of the International Residential Code .