SPS 322.20(4)(d)(d) Roof and ceiling, floor and wall cavity batt or board insulation shall be installed in a manner which will permit inspection of the manufacturer’s R-value identification mark. SPS 322.20(5)(a)(a) A thermal resistance identification mark shall be applied by the manufacturer to each piece of dwelling envelope insulation 12-inches or greater in width. SPS 322.20(5)(b)1.1. The thickness of blown-in roof and ceiling insulation shall be identified by thickness markings that are labeled in inches and installed at least one for every 300 square feet through the attic space. SPS 322.20(5)(b)2.2. The markers shall be affixed to trusses or joists marking the minimum initial installed thickness and minimum settled thickness with numbers a minimum of one-inch in height. SPS 322.20(5)(b)4.4. The thickness of installed insulation shall meet or exceed the minimum initial installed thickness shown by the marker. SPS 322.20(6)(a)(a) A permanent certificate shall be posted on or immediately adjacent to the electrical distribution panel. SPS 322.20(6)(b)(b) The certificate shall be completed by the owner, builder or insulation installer. SPS 322.20(6)(c)(c) The certificate shall list at least the following information: SPS 322.20(6)(c)1.1. The predominant R-values of insulation installed in or on ceilings or roofs, walls, foundation walls, slabs and any heating ducts that are outside the thermal envelope. SPS 322.20(6)(d)(d) If using the REScheck or REM/Rate software programs, the certificate shall be printed from that program. SPS 322.20 HistoryHistory: CR 08-043: cr. Register March 2009 No. 639, eff. 4-1-09; correction in (3) (a) made under s. 13.92 (4) (b) 1., Stats., Register March 2009 No. 639; correction in (3) (b) 2., (c) 3. made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672. SPS 322.21(1)(1) Blanket insulation. Insulating blankets or batts shall be held in place with a covering or other means of mechanical or adhesive fastening. SPS 322.21 NoteNote: If the insulation is on a below-grade wall, s. SPS 322.38 (4) may prohibit the use of vapor retarder material used as the covering. SPS 322.21(2)(a)(a) Except as provided under s. SPS 322.39 (4) for cathedral ceilings, all air-permeable insulation materials installed in any position other than horizontal, shall be covered on the cold-in-winter side with a permanently attached material of low air permeability to maintain the R-value of the insulation. SPS 322.21 NoteNote: Suitable materials for this purpose include house wrap permanently attached with batten strips, asphalt-impregnated felt or tar paper, plywood, oriented strand board or OSB, siding material, rigid insulation sheathing, etc.
SPS 322.21(2)(b)(b) If non-rigid sheet material is used, it shall be water vapor permeable. SPS 322.21 NoteNote: Water vapor permeable materials for this purpose include house wrap permanently attached with batten strips and asphalt-impregnated felt or tar paper.
SPS 322.21(3)(a)(a) Exterior foam plastic insulation shall be protected from physical damage and damage from ultraviolet light with a permanent, opaque, weather-resistant covering or coating. SPS 322.21(3)(b)(b) The protective covering shall cover the exposed exterior insulation and extend a minimum of 2 inches below grade, except the covering is not required below a brick ledge. SPS 322.21 NoteNote: For interior applications, a thermal barrier may be required under s. SPS 321.11. SPS 322.21 HistoryHistory: CR 08-043: cr. Register March 2009 No. 639, eff. 4-1-09; correction in (2) (a) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; CR 15-041: am. (3) (b) Register December 2015 No. 720, eff. 1-1-16. SPS 322.30(1)(1) General. Dwelling thermal envelope insulation amounts and details shall be determined using one of the methods described in this subchapter. SPS 322.30(2)(a)(a) Infiltration for heating design loads shall be calculated based on a maximum of 0.5 air change per hour in the heated space. SPS 322.30(2)(b)1.1. If the proposed design takes credit for a reduced air change per hour level, documentation of the measures providing the reduction or the results of a post-construction blower door test conducted in accordance ASTM E 779 shall be provided to the department. SPS 322.30(2)(b)2.2. The minimum air change per hour rate may not be less than 0.2, unless mechanical ventilation is provided. SPS 322.30(3)(3) Basements and crawl spaces. Where basement and crawl space walls are part of the dwelling thermal envelope, their R-values and U-factors shall be based on the wall components. Adjacent soil may not be considered in the determination. SPS 322.30(4)(a)(a) Except as provided under par. (b), a garage may not be provided with any supplemental heat unless all of the following conditions are met: SPS 322.30 NoteNote: Because of the scope of this chapter, the requirements under this subsection apply only to heat generated from non-renewable sources.
SPS 322.30(4)(b)(b) The thermal envelope requirements under par. (a) are not required if all of the following conditions are met: SPS 322.30(4)(b)2.2. Heating equipment is either separate from the dwelling unit equipment or installed as a separate zone. SPS 322.30(4)(b)3.3. Separate heating equipment shall be sized to provide a maximum indoor temperature of 50°F. SPS 322.30(5)(5) Masonry veneer. When insulation is placed on the exterior of a foundation supporting a masonry veneer exterior, the horizontal foundation surface supporting the veneer is not required to be insulated to satisfy the foundation insulation requirement. SPS 322.30 HistoryHistory: CR 08-043: cr. Register March 2009 No. 639, eff. 4-1-09; correction in (4) (a) 2., 3. made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672. SPS 322.31SPS 322.31 Prescriptive insulation and fenestration criteria. SPS 322.31(1)(a)(a) Except as specifically provided under this subchapter, dwellings using the prescriptive method shall meet the requirements of Table 322.31-1 or 322.31-2. SPS 322.31(1)(b)(b) In Tables 322.31-1 and 322.31-2, zone 2 consists of the following 15 northern counties: Ashland, Bayfield, Burnett, Douglas, Florence, Forest, Iron, Langlade, Lincoln, Oneida, Price, Sawyer, Taylor, Vilas and Washburn. Zone 1 consists of all other counties not included in zone 2. SPS 322.31(2)(a)(a) General. If the total dwelling thermal envelope UA is less than or equal to the total UA resulting from using the U-factors in Table 322.31-2 multiplied by the same assembly area as in the proposed building, the dwelling is in compliance with this chapter. The UA calculation shall be done using a method consistent with the ASHRAE Handbook of Fundamentals and shall include the thermal bridging effects of framing materials. SPS 322.31 NoteNote: UA is equal to the product of the U-factor times the assembly area.
SPS 322.31 NoteNote: REScheck is an acceptable software program for determining compliance with this section.
SPS 322.31(2)(b)(b) Software version. If a REScheck software program is used to show compliance with this section, a version approved by the department shall be used. SPS 322.31 NoteNote: The IECC 2009 version of REScheck meets the thermal envelope requirements of this code.
SPS 322.31(3)(a)(a) Except as allowed under par. (b) and s. SPS 322.46, oil-fired and gas-fired furnaces and boilers shall meet the minimum efficiency requirements in Table 322.31-3. SPS 322.31(3)(b)(b) In new construction, an oil-fired or gas-fired furnace or boiler meeting the federal efficiency standard but not the requirements of Table 322.31-3 may be installed if the dwelling thermal envelope requirements of Table 322.31-4 are met. TABLE 322.31-1
INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa
TABLE 322.31-2
EQUIVALENT U-FACTORS
TABLE 322.31-4
COMPONENT DWELLING THERMAL ENVELOPE REQUIREMENTS
FOR DWELLINGS USING LOWER EFFICIENCY APPLIANCESa
SPS 322.31 HistoryHistory: CR 08-043: cr. Register March 2009 No. 639, eff. 4-1-09; EmR0917: emerg. am. (2) (b), eff. 9-5-09; CR 09-072: am. (2) (b) Register March 2010 No. 651, eff. 4-1-10; CR 09-104: am. Tables 22.31-1 and 22.31-4 Register December 2010 No. 660, eff. 1-1-11; correction in (1) (a), (b), (2) (a), (b), (3) (a), (b), Table 322.31-1, Table 322.31-4 made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672l; CR 15-041: am. Table 322.31-1, Table 322.31-2, Table 322.31-4 Register December 2015 No. 720, eff. 1-1-16. SPS 322.32SPS 322.32 Specific insulation requirements. SPS 322.32(1)(a)(a) R-38 will satisfy the ceiling R-value requirement for a dwelling where the full height of uncompressed R-38 insulation extends over the wall top plate at the eaves. SPS 322.32(1)(b)(b) An attic-access cover shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces when the attic is an unconditioned space. A wood framed or equivalent baffle or retainer is required to be provided when loose fill insulation is installed, the purpose of which is to prevent loose fill insulation from spilling into the living space when the attic access is opened, and to provide a permanent means of maintaining the installed R-value of the loose fill insulation. SPS 322.32(2)(2) Ceilings without attic spaces. Where the design of the roof or ceiling assembly does not allow sufficient space for the required R-49 insulation, the minimum required insulation for the roof or ceiling assembly shall be R-30. This reduction of insulation shall be limited to 500 square feet of ceiling area. SPS 322.32(3)(3) Mass walls. The requirements of Table 322.31-1 are applicable to mass walls. SPS 322.32(4)(a)(a) Steel-frame ceilings, walls and floors shall meet the insulation requirements of Table 322.32 or shall meet the U-factor requirements in Table 322.31-2. SPS 322.32(4)(b)(b) The calculation of the U-factor for a steel-frame envelope assembly shall use a series-parallel path calculation method. SPS 322.32(5)(5) Floors. Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking. SPS 322.32(6)(a)(a) Walls associated with conditioned basements shall be insulated from the top of the basement wall down to the basement floor. SPS 322.32(6)(b)(b) Walls associated with unconditioned basements shall meet the requirement in par. (a) unless the floor overhead is insulated in accordance with Table 322.31-1. SPS 322.32(6)(c)(c) Where the total basement wall area is less than 50 percent below grade, the entire wall area, including the below-grade portion, is included as part of the area of exterior walls. SPS 322.32(7)(7) Box sill and rim joist spaces. Box sills and joist spaces at outside walls shall be insulated to the required wall R-value with air-impermeable insulation that is sealed on all sides to all framing members and the foundation, or with air-permeable insulation held in place as required under s. SPS 322.21 (1).
