Mold Remediation in Philadelphia, Pennsylvania

Philadelphia summers bring dew points into the 70s from June through September, and rowhomes with below-grade cellars along the Schuylkill and Delaware corridors hold that humidity against stone and brick foundation walls for weeks at a time.

Cellars in older housing stock often have dirt floors or unsealed concrete, and groundwater seepage combined with poor ventilation keeps relative humidity above the threshold where mold colonizes framing and stored contents year round.

Rowhome party walls trap moisture between units, so a leak or humidity problem in one home can develop mold that spreads through shared framing into the adjoining structure before either owner notices.

Cellars in Kensington, Fishtown, and South Philadelphia rowhomes are the most common source, particularly where a prior sewer backup or plumbing leak was dried with fans instead of professional equipment.

Bathroom exhaust fans vented into rowhome attics rather than outside are common in older construction and produce growth on roof decking as well as around tub and shower surrounds.

Older stone foundation homes in Chestnut Hill and Mount Airy see seepage-driven mold on framing near grade, especially after wet spring seasons.

HVAC systems retrofitted into older housing stock in University City and Center City spread spores through ductwork when condensate pans and coils are not maintained.