Start with conditions, not a product
The staining you can see on rafters or sheathing is the easy part to spot. The harder, more important work is tracing the moisture back to its source, keeping tabs on attic humidity, judging how far it has spread into insulation and framing, sealing off the work area from the rest of the house, and confirming the fix afterward.
Build a complete scope
- What is feeding the growth, identified ahead of any cleaning quote
- Whether it traces to the roof, a plumbing failure, or humidity alone
- Containment and air handling while the area is open
- What is removed versus cleaned, and the reasoning behind that line
- Post-work verification and the correction that stops it recurring
Cary context
Cary's building boom ran through hot, humid Piedmont summers, and a lot of that era's roof framing used ventilation baffles and soffit vents sized for builder-grade code minimums rather than the region's actual attic heat load. Complex rooflines on premium subdivision homes add valleys and dormers that are common points for slow leaks to reach attic sheathing unnoticed.