Photo Album: Multi-Family Sub-slab/Sub-membrane depressurization System

This photoshoot shows a job our team completed on a multi-unit building. We completed a combination sub-slab and sub-membrane depressurization. We installed a sub-membrane (Vapor Barrier) in the crawlspace and completely sealed it to all the foundation walls. We then installed a sub-slab depressurization system and connected it to the vapor barrier. This system created negative pressure under the sub-membrane and the concrete slab of the building. The radon gas followed the path of least resistance and was safely vented above the building.