Section SPS 322.21 - Protection of insulation(1) BLANKET INSULATION. Insulating blankets or batts shall be held in place with a covering or other means of mechanical or adhesive fastening. Note: 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.
(2) WIND WASH PROTECTION. (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. Note: 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.
(b) If non-rigid sheet material is used, it shall be water vapor permeable. Note: Water vapor permeable materials for this purpose include house wrap permanently attached with batten strips and asphalt-impregnated felt or tar paper.
(3) FOAM PLASTIC INSULATION. (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.(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.Wis. Admin. Code Department of Safety and Professional Services SPS 322.21
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.Amended by, CR 15-041: am. (3) (b) Register December 2015 No. 720, eff.1/1/2016Note: For interior applications, a thermal barrier may be required under s. SPS 321.11.