SPS 322.32 (9) (b) The vertical and flared walls in a skylight shall meet the insulation requirements for walls. Tube skylights shall be insulated per the manufacturer’s recommendations.
SECTION 107.
SPS 322.33 (1) is renumbered SPS 322.33 (1) (a) and amended to read: SPS 322.33 (1) (a) Any heated or unheated slab floor, the bottom of which is less than 12 inches below adjacent grade, shall be provided with perimeter insulation in accordance with Table 322.31-1 or Table 322.31-4, except as provided in par. (b).
SECTION 108.
SPS 322.33 (1) (b) and (3) (c) are created to read: SPS 322.33 (1) (b) At the threshold or the base of any door opening that leads directly to the exterior of the structure, the vertical perimeter insulation shall be at least R-5, excluding all garage doors.
(3) (c) Insulation on a foundation wall for a basement may be interrupted at the junction with a foundation wall.
SECTION 109.
SPS 322.34 (2) (d) is amended to read: SPS 322.34 (2) (d) The edges of the vapor retarder shall extend at least 6 inches up the foundation wall and shall be attached and sealed to the foundation wall or insulation.
SECTION 110.
SPS 322.37 (6) (intro), (a) 1. to 7. and (b) are created to read: SPS 322.37 (6) Compliance Demonstration. Building envelope air
tightness and insulation installation shall be demonstrated to comply with one of the following options:
(a) Testing option. Building envelope tightness and insulation installation shall be considered acceptable when tested air leakage is less than seven air changes per hour (ACH) when tested with a blower door at a pressure of 33.5 psf (50 Pa). Testing shall occur after rough in and after installation of penetrations of the building envelope,
including penetrations for utilities, plumbing, electrical, ventilation and combustion appliances. During testing all of the following shall be done:
1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed;
2. Dampers shall be closed, but not sealed, including exhaust, intake, makeup air, backdraft and flue dampers;
3. Interior doors shall be open;
4. Exterior openings for continuous ventilation systems and heat recovery ventilators shall be closed and sealed;
5. Heating and cooling system(s) shall be turned off;
6. HVAC ducts shall not be sealed; and
7. Supply and return registers shall not be sealed.
(b) Visual inspection option. Building envelope tightness and insulation installation shall be considered acceptable when the items listed in Table 332.37, applicable to the method of construction, are field verified. Where required by the code official, an approved party independent from the installer of the insulation shall
inspect the air barrier and insulation.
SECTION 111.
SPS 322.37 (6) Table 322.37 is created to read:TABLE 332.37
AIR BARRIER AND INSULATION INSPECTION COMPONENT CRITERIA
Air barrier and thermal barrier | Exterior thermal envelope insulation for framed walls is installed in substantial contact and continuous alignment with building envelope air barrier. Breaks or joints in the air barrier are filled or repaired. Air-permeable insulation is not used as a sealing material. Air-permeable insulation is inside of an air barrier. |
Ceiling/attic | Air barrier in any dropped ceiling/soffit is substantially aligned with insulation and any gaps are sealed. Attic access (except unvented attic), knee wall door, or drop down stair is sealed. |
Walls | Corners and headers are insulated. Junction of foundation and sill plate is sealed. |
Windows and doors | Space between window/door jambs and framing is sealed. |
Rim joists | Rim joists are insulated and include an air barrier. |
Floors (including above-garage and cantilevered floors) | Insulation is installed to maintain permanent contact with underside of subfloor decking. Air barrier is installed at any exposed edge of insulation. |
Crawl space walls | Insulation is permanently attached to walls. Exposed earth in unvented crawl spaces is covered with Class I vapor retarder with overlapping joints taped. |
Shafts, penetrations | Duct shafts, utility penetrations, knee walls and flue shafts opening to exterior or unconditioned space are sealed. |
Narrow cavities | Batts in narrow cavities are cut to fit, or narrow cavities are filled by sprayed/blown insulation. |
Garage separation | Air sealing is provided between the garage and conditioned spaces. |
Recessed lighting | Recessed light fixtures are air tight, IC rated, and sealed to drywall. Exception-fixtures in conditioned space. |
Plumbing and wiring | Insulation is placed between outside and pipes. Batt insulation is cut to fit around wiring and plumbing, or sprayed/blown insulation extends behind piping and wiring. |
Shower/tub on exterior wall | Showers and tubs on exterior walls have insulation and an air barrier separating them from the exterior wall. |
Electrical/phone box on exterior walls | Air barrier extends behind boxes or air sealed-type boxes are installed. |
Common wall | Air barrier is installed in common wall between dwelling units. |
HVAC register boots | HVAC register boots that penetrate building envelope are sealed to subfloor or drywall. |
Fireplace | Fireplace walls include an air barrier. |
SECTION 112.
SPS 322.38 (1) (b) is renumbered SPS 322.38 (1) (b) (title) and 1. and amended to read: SPS 322.38 (1) (b) Continuity 1. The vapor retarder shall be continuous. All joints in a vapor retarder consisting of sheet material shall be overlapped 6 inches and taped or sealed, except as provided in subd. 2. Rips, punctures, and voids in the vapor retarder shall be patched with vapor retarder materials and taped or sealed. Seams that are not over a framing member shall be taped or sealed.
SECTION 113.
SPS 322.38 (1) (b) 2. is created to read: SPS 322.38 (1) (b) 2. Taping or sealing a vapor retarder is not required around doors and windows, behind bathtub enclosures, and at top and bottom wall plates, if the retarder is held to those materials in an airtight manner by other building components, such as gypsum wallboard.
SECTION 114.
SPS 322.38 (2) (c) 4. is amended to read: SPS 322.38 (2) (c) 4. No vapor retarder is required over cavities that are insulated solely with have at least 50% of the required R-value provided by spray-applied foam having a perm rating of 1.0 or less, unless required by the foam manufacturer.
SECTION 115.
SPS 322.38 (2) (c) 4. (Note) is repealed.SECTION 116.
SPS 322.38 (2) (c) 5. is created to read: SPS 322.38 (2) (c) 5. A vapor retarder for a floor over an open, unheated area may consist of 5/8-inch tongue-and-groove oriented-strand board, or 3/4-inch tongue-and-groove CDX plywood, which is exposure-rated plywood.
SECTION 117.
SPS 322.42 (1m) is created to read. SPS 322.42 (2) Cooling supply ducts that pass through unconditioned spaces conducive to condensation, such as attics, shall be provided with insulation having a thermal resistance of at least R–8. The exterior of that insulation shall be covered with a vapor retarder that meets the requirements in s. SPS 322.38 (1) SECTION 118.
SPS 322.43 (7) (intro) and 1. and 2. and (8) are created to read: SPS 322.43 (7) Except where exempted as indicated in par. (8), duct tightness shall be verified by either of the following:
1. Postconstruction test: Leakage to outdoors shall be less than or equal to 8 cfm per 100 ft2 of conditioned floor area or a total leakage less than or equal to 12 cfm per 100 ft2 of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including the manufacturer's air handler enclosure. All register boots shall be taped or otherwise sealed during the test.
2. Rough-in test: Total leakage shall be less than or equal to 6 cfm per 100 ft2 of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the roughed in system, including the manufacturer's air handler enclosure. All register boots shall be taped or otherwise sealed during the test. If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 4 cfm per 100 ft2 of conditioned floor area.
(8) A duct tightness test is not required if the air handler and all ducts are located within conditioned space.
