Crawlspace encapsulation & radon
What we encapsulate
Across older and newer homes in Central Illinois, crawlspaces that touch soil need a continuous liner, thoughtful drainage, and a plan for radon whether you mitigate now or later. We see these conditions most often in Peoria, Mattoon, and Decatur, plus surrounding communities in Peoria, Coles, and Macon counties.
We assess moisture, access, and prior work, then install a durable membrane system with sealed piers, penetrations, and transitions so conditioned air and soil-gas control stay predictable.
How we approach each crawlspace
Six pillars—from assessment to handoff—that keep moisture, air quality, and radon pathways aligned.
-
Assessment & drying plan
Grading, groundwater signs, existing insulation, and how air moves through the floor system—so the encapsulation layer is not fighting active water or hidden bypasses.
-
Drainage & sump strategy
Where perimeter or spot drainage belongs, how it ties to an existing sump, and when dehumidification or conditioning is part of keeping the space dry long term.
-
Liner, seams & penetrations
Heavy-duty vapor barrier on floor and walls, sealed overlaps, wrapped piers, and clean transitions at HVAC, utilities, and access hatches so the envelope reads as one system.
-
Radon & soil gas coordination
Communication with mitigation layout—suction points, liner penetrations, and sealed edges—so soil gas is routed intentionally instead of short-circuiting at the rim.
-
Insulation & conditioning
Rim band, wall insulation where it fits your goals, and a path to conditioned crawlspace practice that matches code and how you use the home.
-
Walkthrough & care
What to monitor after closeout, how seasonal humidity may behave, and when system checks or retesting make sense alongside encapsulation.
Ready when you are
Share your foundation type, timeline, and any test result you already have. No radon reading yet? That is okay—we can still walk you through options, including how to get a reliable reading before mitigation. Prefer reading first? See the radon FAQ.