Crawl space remediation in Pittsburgh, PA

Crawl space encapsulation is sealing the crawl space against moisture from the ground and outside air, so the space stays dry year-round. A real encapsulation is not a plastic sheet tossed over dirt. Ours includes drainage matting, sealed cracks and air gaps, and insulated walls. Then a 90+ mil liner goes down, extended at least 12 inches up the perimeter walls, with a commercial-grade dehumidifier holding the space at 55% relative humidity or less. If mold is present, removal happens first. Sealing mold into a crawl space is not a fix.

Want it inspected this week? Call (412) 226-9468.

You don't have to crawl under the house to know something is wrong down there. The signals show up in the living space:

• A musty smell that cleaning never fixes
• Visible mold on floor joists
• Condensation on ductwork
• Sagging or bouncy floors
• Allergy symptoms that flare at home

Any one of these is worth a look. Two or more, and the stack effect is already moving that crawl space air through your bedrooms.

Dampness under a house does not stay put. The problems we find all trace back to the same moisture:

• Mold growth on framing
• Termites and other wood-destroying organisms
• High heating and cooling costs
• Condensation on windows, ductwork, and the structure itself

Dark staining on joists is often mold. If it is the greenish-black kind, that is a job for black mold removal before any encapsulation begins.

Step one is never the liner. If the crawl space has mold, removal comes first, and we recommend a third-party mold test and assessment. Un-Flood-It does not perform testing, so the numbers that clear the space come from someone who does not work for us. Pennsylvania has no state license for mold work, so that unbiased check is the strongest proof there is. This page connects directly to our mold remediation services. Same crew, same containment discipline, same rule about not grading our own homework.

1. Comprehensive inspection — measured, not eyeballed, so the estimate is accurate.
2. Mold removal first, with a third-party test and assessment highly recommended.
3. Drainage matting (dimple mat) on the floor. It protects the liner from punctures and leaves an airflow path if radon mitigation is ever added.
4. Seal cracks and air infiltration with green caulk and foam, with special attention for occupants with CIRS or chemical sensitivities.
5. Insulation upgrade to R10. Carbon-infused board or blanket on the walls, rock wool around the sill plate perimeter, adjusted to code.
6. Encapsulation liner, 90+ mil thick, across the floor and at least 12 inches up the perimeter walls.
7. Commercial-grade AprilAire dehumidifier, sized to the space, holding 55% relative humidity or less all year.

The spec sheet, in numbers:

Why 55%? The EPA says to keep indoor humidity below 60 percent, and ideally between 30 and 50. The key to mold control is moisture control — the EPA's words. Their brief guide to mold and moisture is worth ten minutes if you want the reasoning behind the spec.

Honesty about edges keeps projects clean. If your crawl space needs a french drain and sump pump, we recommend a plumbing company to install those properly. That is their trade, not ours. Radon systems are the same story. Our drainage matting is laid radon-ready, and the mitigation fan itself belongs to a radon professional. We handle the moisture, the mold, and the seal. We do not do rebuilds, and we will not sell you work that belongs to another trade.