Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter CHAPTER 51 - MASSACHUSETTS RESIDENTIAL CODE
Appendix AF - RADON CONTROL METHODS - ADOPT AS REVISED
Section AF103.5

Current through Register 1543, March 14, 2025

Revise and replace section AF103.5.2 Soil-gas-retarder as follows:

AF103.5.2Soil-gas-retarder.A soil-gas-retarder shall be placed on top of the gas-permeable layer prior to casting the slab or placing the floor assembly. The soil-gas retarder shall cover the entire floor area with separate sections lapped not less than 12 inches (305 mm) and shall extend upward six inches and be sealed to the wall with an ASTM C290 class 25 or higher sealant or equal. The soil-gas-retarder shall fit closely around any pipe, wire, or other penetrations of the material. Punctures or tears in the material shall be sealed or covered. Under-slab insulation, if used, shall be placed on top of the sheeting

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