Fire & Smoke Restoration In this walkthrough you’ll see a second-floor space where smoke traveled up an exterior wall system. Sheetrock over older plaster & lath and infiltrated the wall envelope. Because smoke particles penetrate porous materials and building cavities, they can linger long after the fire is out, especially when temperature and humidity swings cause these odors to resurface. That’s why our job at the outset is to identify hidden migration paths, remove all affected materials, an