Homes built over unpaved dirt crawlspaces face severe radon exposure, as radioactive gases rise freely through exposed soil and porous foundation masonry into living areas. Standard thin plastic sheets cannot contain soil gas pressures. We install commercial-grade 20-mil reinforced crawlspace encapsulation barriers paired with sub-membrane perforated suction piping that captures radon before it enters your home.
We lay industrial-grade 20-mil cross-laminated polyethylene film over the crawlspace floor. Engineered with virgin polyolefin resins and cord reinforcement, this barrier resists punctures from sharp mountain gravel while providing an impermeable seal against radon, moisture, and ground soil odors.
Beneath the sealed membrane, we bury perforated 4-inch corrugated pipe loops embedded in clean crushed stone. This sub-membrane vacuum grid distributes negative pressure uniformly across the entire crawlspace, funneling gas directly to the exterior suction fan.
Loose edges allow radon to bypass barriers. We run the membrane 12 inches up foundation walls, mechanically anchoring it with rust-proof aluminum termination bars and sealing the top edge with structural polyurethane mastic to ensure a gas-tight bond against concrete blocks.
Crawlspace support piers and plumbing drain drops are common leakage pathways. We wrap and tape every vertical pier column and seal all pipe penetrations with custom collar boots and expanding foam to prevent radon bypass into subfloor framing.
Yes. Encapsulating the crawlspace with a 20-mil vapor barrier stops ground moisture evaporation, reducing crawlspace humidity, preventing wood rot, and lowering summer air conditioning costs.
Yes. Our 20-mil multi-layer membranes are heavy-duty and puncture-resistant, allowing homeowners to walk on the surface and store bins safely without damaging the gas seal.
Membrane rolls are overlapped by a minimum of 12 inches and permanently bonded using heavy double-sided butyl tape and reinforced vinyl seam sealing tape.