Water Damage Drying Time Estimator
Drying time after water damage depends on the materials affected, the severity of saturation, ambient conditions, and the equipment deployed. This calculator provides professional-grade estimates based on industry restoration standards (IICRC S500).
Estimate Drying Time
Estimates based on IICRC S500 guidelines. Actual drying time varies with ventilation, temperature, humidity, and number of air movers deployed. Professional moisture monitoring is recommended to confirm materials have reached acceptable moisture content.
Understanding Water Damage Categories
The Institute of Inspection, Cleaning and Restoration Certification (IICRC) classifies water damage by source contamination level, which determines both drying protocol and materials that can be salvaged.
| Category | Source | Action |
|---|---|---|
| Category 1 | Clean water — broken supply lines, rain, melting ice | Dry in place; most materials salvageable within 48 hours |
| Category 2 | Gray water — washing machine, dishwasher, toilet overflow (urine only) | Antimicrobial treatment required; carpet pad typically replaced |
| Category 3 | Black water — sewage, rising flood water, standing water >72 hours | Porous materials (carpet, pad, drywall) must be removed and replaced |
Factors That Affect Drying Time
- Material porosity — carpet dries faster than hardwood; concrete is slowest
- Saturation depth — Class 3/4 damage means water in wall cavities and subfloor, adding days
- Equipment — commercial LGR dehumidifiers can cut drying time by 40–60% compared to natural drying
- Air movement — air movers (centrifugal fans) are essential alongside dehumidification
- Temperature — warmer air holds more moisture; ideal drying range is 70–90°F
- Ambient humidity — high outdoor humidity slows drying, especially in coastal regions
Frequently Asked Questions
How long does it take to dry a house after water damage?
With professional equipment (commercial dehumidifiers and air movers), most residential water damage can be dried in 3–5 days. Without professional equipment, the same area may take 2–4 weeks and risks mold growth after 48–72 hours of sustained moisture.
When does mold become a concern?
Mold can begin colonizing on damp organic materials (drywall, wood, carpet) within 24–72 hours. Any water damage event should prioritize rapid drying to stay below this threshold. If the area has been wet for more than 72 hours, mold testing is recommended before reconstruction.
Should wet drywall be removed or dried in place?
For Category 1 water with less than 24 inches of wicking, drywall can typically be dried in place using commercial equipment. For Category 2/3 water, or if drywall has been wet for more than 48 hours, removal and replacement is standard practice.