2021 IRC CODE : UNDER-SLAB VAPOR CONTROL

UNDERSTANDING VAPOR RETARDER COMPLIANCE

2021 IRC Guide

ISI explains 2021 IRC requirement upgrades for under-slab vapor retarders in homes.

Samples & Product Data

Viper II 10 mil, 15 mil, 20 mil & Viper Venom all meet the 2021 IRC requirements for vapor retarders under-slab.