Remediation Service
Long Island's #1 mold problem. Sheathing mold from blocked bath-fan venting and under-vented roofs. We treat the wood AND fix the ventilation.
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Overview
Attic mold is the most common mold problem in Long Island homes. The usual mechanism: a bathroom exhaust fan dumping moist air into the attic instead of through the roof. After a winter or two of this, the plywood sheathing on the cold side of the attic (usually north-facing) starts growing mold. Most contractors will just treat the wood. We do that, but we also fix the ventilation — because if you don't, the mold comes back.
Walk the attic, confirm colony pattern, locate moisture source(s). Verify bath-fan discharge routing, soffit vent blockage, ridge vent condition, ice dam history.
Poly barriers at the attic hatch, negative-air machines vented outside, PPE setup.
HEPA-vacuum the sheathing, sand visible growth, apply EPA-registered antimicrobial, encapsulate with mold-barrier coating on heavily-affected areas.
Re-route the bath fan through the roof with an insulated duct. Clear soffit vents. Add ridge vent or soffit baffles if missing. Install a whole-house dehumidifier if humidity readings demand it.
Final visual inspection, air sample if requested, photographic record. We leave you with a file the next buyer's inspector will respect.
The single most common cause on Long Island. A bath-fan duct that terminates in the attic (instead of through a roof cap) drives humidity onto cold sheathing all winter.
Older homes with minimal or blocked soffit/ridge venting trap humidity year-round. Adding baffles and ridge vent is usually a $500–$1,500 add-on that pays for itself by preventing re-growth.
Repeated ice-dam cycles push water up under shingles. The attic insulation stays wet; the sheathing above it grows mold.
Most attic jobs run $2,000–$5,500 depending on square footage of sheathing and the scope of ventilation remediation. Severe cases with full deck replacement can reach $8,000+.
Every quote is fixed after inspection — no hourly billing, no change orders unless the substrate reveals hidden contamination.See full pricing guide →
Field Log
Real jobs. Real towns. Actual scope and scale from our last 90 days of field work.
Attic Mold RemediationCape Cod attic — 600 sqft of Stachybotrys on plywood sheathing traced to blocked bath-fan venting. Full containment, HEPA filtration, antimicrobial treatment, ridge vent retrofit, PRV clearance passed.
Attic Mold RemediationColonial attic — white surface mold + dark spots on north-slope sheathing. Poor soffit ventilation. Treated wood, installed baffles, added roof vents.
Attic Mold RemediationPre-war colonial, knob-and-tube-era attic. Lath sheathing treated carefully, added cross-flow ventilation, PRV passed.
FAQ
More services
Full IICRC S520 remediation — containment, HEPA filtration, removal, and clearance. Our core service.
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Emergency Stachybotrys removal with negative-air containment, respirator-grade crew, and PRV clearance testing.
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From crawl-space dampness to finished-basement flood damage. South Shore specialty — Sandy legacy and nor'easter water events.
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Vapor barriers, joist treatment, dehumidification — the three-step fix for chronic crawl-space mold in older LI homes.
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Hidden behind tile, under vanities, and inside wall cavities — most bathroom mold comes from pinhole leaks that have been wet for years.
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Category 3 water protocol — Sandy legacy cleanup, storm floods, basement nor'easter events. Insurance-documented from day one.
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Ready to breathe easier?
Free visual inspection, same-day estimate. Licensed assessor handles the test separately from remediation — NY Article 32 compliant from the first call.
Mon–Sun 7am–8pm · 24/7 emergency line
