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t.A1111110111& 2025 Single -Family Residential Mandatory Requirements <br />CITY OF SANTA ANA <br />�,Q,pjng and Building Agency <br />Q.. NA;: Cn alnna• <br />Approved <br />Air Leakage. Manufactured fenestration, exterior doors, and exterior pet doors must limit air leakagE <br />to pPf o <br />§ 110.6(a)1: <br />less when tested per NFRC400, ASTM E283, or AAMAIWDMA/CSA 101/I.S.2/A440-2011.' <br />U-factor, Solar heat gain coefficient, Visible transmittance. The fenestration product and exteri <br />r door's U-factor and solar heat <br />§110.6(a)24: <br />gain coefficient (SHGC) shall be rated in accordance with NFRC 100 and NFRC 200, or use the ap <br />liMl�%4fap&� in Table 110.6-A <br />and TABLE 110.6-B. The visible transmittance (VT) shall be rated in accordance with NFRC 200 or <br />bTq E972, for tubular <br />a e: <br />da li htin devices VT shall be rated usingNFRC 203.' <br />§ 110.6(a)5: <br />Labeling. Fenestration products and exterior doors must have a label meeting the requirements of §1 <br />§ 110.6(b): <br />Field -fabricated Exerior Doors and Fenestration products must use U-factors and soar heat gain coefficient <br />values from Table 110.6-B. Must be caulked and/or weather-stripped. ' <br />Air Leakage. All joints, penetrations, and other openings in the building envelope that are potential sources of air leakage must be <br />§ 110.7: <br />caulked, gasketed, or weather-stripped. <br />Insulation Certification by Manufacturers. Insulation must be certified by the Department of Consumer Affairs, Bureau of Household <br />§ 110.8(a): <br />Goods and Services (BHGS). <br />§ 110.8(g): <br />Insulation Requirements for Heated Slab Floors. Heated slab floors must be insulated perthe requirements of §110.8(g). <br />Roofing Products Solar Reflectance and Thermal Emittance. The thermal emittance and aged solar reflectance values of the roofing <br />§ 110.8(i): <br />material must meet the requirements of § 110.8(i) and be labeled per §10-113 when the installation of a cool roof is specified on the CF1 R. <br />§ 110.80): <br />Radiant Barrier. When required, radiant barriers must have an emittance of 0.05 or less and be certified to the Department of Consumer <br />Affairs. <br />Roof Deck, Ceiling, and Rafter Roof Insulation. Roof decks in newly constructed attics above conditioned space in climate zones 4 and <br />8-16 area -weighted average U-factor not exceeding U-0.184. Ceiling and rafter roofs minimum R-22 insulation in wood -frame ceiling; or <br />§ 150.0(a): <br />area -weighted average U-factor must not exceed 0.043. Rafter roof alterations minimum R-19 or area -weighted average U-factor of 0.054 <br />or less. Attic access doors must have permanently attached insulation using adhesive or mechanical fasteners. The attic access must be <br />gasketed to prevent air leakage. Insulation must be installed in direct contact with a roof or ceiling that is sealed to limit infiltration and <br />exfiltration as specified in §110.7, including but not limited to placing insulation either above or below the roof deck or on top of a drywall <br />ceiling. <br />§ 150.0(b): <br />Loose -fill Insulation. Loose fill insulation must meet the manufacturer's required density for the labeled R-value. <br />Wall Insulation. Minimum R-15 insulation in 2x4 inch wood framing wall or have a U-factor of 0.095 or less, or R-21 in 2x6 inch wood <br />§ 150.0(c): <br />framing or have a U-factor of 0.069 or lesstOpaque non -framed assemblies must have an overall assembly U-factor not exceeding 0.102. <br />Masonry walls must meet Tables 150.1-A. <br />§ 150.0(d): <br />Raised -floor Insulation. Minimum R-19 insulation in wood framed raised -floor or 0.037 maximum U-factor. <br />Slab Edge Insulation. Slab edge insulation must meet the following: water absorption rate no greater than 0.3 percentfor insulation material <br />§ 150.0(f): <br />alone without facings; water vapor permeance no greater than 2.0 perm per inch; protected from physical damage and UV light deterioration; <br />and, when installed as part of a heated slab floor, meet the requirements of §110.8(g). <br />Vapor Retarder. In climate zones 1 through 16, the earth floor of unvented crawl space must be covered with a Class I or Class II <br />§ 150.0(g)1: <br />vapor retarder. This requirement also applies to controlled ventilation crawl space for buildings complying with the exception to <br />150.0 d . <br />Vapor Retarder. In climate zones 14 and 16, a Class I or Class II vapor retarder must be installed on the conditioned space side of all <br />§ 150.0(g)2: <br />insulation in all exterior walls, vented attics, and unvented attics with air -permeable insulation. <br />Fenestration Products. Fenestration, including sFyTigHts, separating conditioned space from unconditionea space or outdoors must have <br />§ 150.0(q): <br />a maximum area -weighted average U-factor of 0.40. <br />QAl , P-dinaee- <br />Single-family Residences. Single-family residences located in subdivisions with 10 or more single-family residences and where the <br />§ 110.10(a)1: <br />application for a tentative subdivision map for the residences has been deemed complete and approved by the enforcement agency, <br />which do not have a photovoltaic system installed, must comply with the requirements of §110.10 b e . <br />Minimum Solar Zone Area. The solar zone must comply with access, pathway, smoke ventilation, and spacing requirements per Title <br />24, Part 9, or other parts of Title 24, or any requirements adopted by a local jurisdiction. The solar zone must be located on the roof or <br />§110.10(b)1A: <br />overhang of the building and have a total area no less than 250 square feet. The solar zone total area must be comprised of areas with <br />no dimension less than 5 feet and no less than 80 square feet each for buildings with roof areas up to 10,000 square feet; or no less <br />than 160 square feet each for buildings with roof areas greater than 10,000 square feet. <br />§ 110.10(b)2: <br />Azimuth. All sections of the solar zone located on steep -sloped roofs must have an azimuth between 90-300° of true north. <br />-Sfi-aT5ng_._N­o_obstructions in soar zone, including but noF imi a o: ven s, chimneys, arcnitectural features, and roof <br />i <br />§ 110.10(b)3A: <br />mounted equipment. <br />Shading. Any obstruction located on the roof or any other part of the building that projects above a solar zone must be located at least twice the <br />§ 110.10(b)3B: <br />horizontal distance of the height difference between the highest point of the obstruction and the horizontal projection of the nearest point of the <br />' <br />solar zone, measured in the vertical plane. <br />Structural Design Loads on Construction Documents. For areas of the roof designated as a solar zone, the structural design loads for <br />§ 110.10(b)4: <br />roof dead load and roof live load must be clearly indicated on the construction documents. <br />Interconnection Pathways. The construction documents must indicate: a location reserved for inverters and metering equipment and a <br />§ 110.10(c): <br />pathway reserved for routing of conduit from the solar zone to the point of interconnection with the electrical service; and for single-family <br />residences and central water -heating systems, a pathway reserved for routing plumbing from the solar zone to the water -heating system. <br />