Drying Time Estimator
Estimate typical water damage drying duration based on IICRC S500 standards. Considers area, damage class, humidity, and dehumidifier capacity. Output is a time range — not personalized advice.
How much area is affected?
Approximate the total affected square footage (drag the slider).
Educational tool only. Information provided is general and based on industry standards (IICRC S500/S520, Health Canada mould guidance, IBC industry data). For your specific situation, consult a licensed Canadian professional. Results are not personalized advice.
How drying time is calculated
Per IICRC S500, drying time depends on four primary factors: (1) the volume of water absorbed by porous materials, (2) the material's permeability and rate of evaporation, (3) the indoor atmospheric conditions (temperature, relative humidity), and (4) the capacity of dehumidification and air movement equipment deployed.
Class 1 damage (minimal saturation) typically dries in 1-3 days with proper equipment. Class 2 (full room) takes 3-5 days. Class 3 (overhead saturation) takes 5-7 days. Class 4 (specialty drying for hardwood, plaster, concrete) can take 10-21 days using desiccant dehumidification.
Why proper drying matters: The EPA recommends drying water-damaged areas within 24-48 hours to prevent mold growth. Surface drying alone is insufficient — moisture trapped in wall cavities, subfloors, and insulation must be verified dry with moisture meters before reconstruction begins.