Last updated: October 2026 · Cost figures are national reference ranges from published industry sources, not quotes.

A roof leak does damage in two places: the roof itself (a roofing contractor's job) and the interior — attic insulation, drywall, and framing (a restoration job). Interior drying and repair typically runs $500–$2,500+, while the roof repair is quoted separately. The expensive variable is time: a leak that ran for months rots decking and grows mold long before the ceiling stains.

Cost breakdown

Scope	Typical range	Notes
Interior drying + drywall repair	$500–$2,500+	Depends on how much insulation and drywall the water reached.
Roof repair (shingle section)	typically $300–$1,500	Quoted by a roofer, separate from the interior restoration.
Decking replacement	adds $500–$2,000+	If the leak rotted the roof deck, the shingles above it come off too.
Mold treatment (delayed leaks)	adds $500–$2,000+	Attic mold from long-running leaks; see our sister mold cost guide.

What moves the price

• How long it leaked before discovery — slow leaks do the worst damage
• Whether attic insulation is saturated (it usually must be removed, not dried)
• Roof decking condition — rot means the roofing scope grows
• Roof age and material — repair vs. replace math changes near end of life

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