Water Damage Drying Log & Mitigation Report Template

A drying log is the dated record of conditions, moisture readings and equipment that shows a structure was dried rather than left to dry. It carries four things: the psychrometric conditions inside and outside the drying chamber, the moisture content of the affected materials measured at fixed points, the equipment installed with the dates it went in and came out, and the reasoning behind anything that changed mid-job. Documenting the inspection, monitoring and drying process is part of the standard order of work; the ANSI/IICRC S500 is the document that sets out what the industry expects a restorer to record.

The reading set that carries the most weight is the four-location one: outside, an unaffected area inside the building, the affected area, and the dehumidifier intake and exhaust. Outside gives context for what the weather was doing. Unaffected gives you the target the affected space is being pulled toward. Affected shows the trend. Intake and exhaust prove the machine is condensing water rather than humming in the corner — the grain depression between them is the single fastest check on whether a dehumidifier is working, and this template calculates it whenever both rows exist for the same day.

The dry standard is a measured value; the drying goal is the target you set from it. Take the dry standard from unaffected material of the same type in the same building — the drywall in the next room, the subfloor two rooms over — because species, thickness and the building's own history all move the number. A hardwood floor in a coastal building in July does not read the same as an identical floor in a dry climate in January, so an assumed number from a training slide is not a standard for this job.

The drying goal is then written per material and recorded in the file before the equipment goes in. That way completion is a comparison rather than an argument: point 4 sits at or below its goal on two consecutive readings, so point 4 is done. The moisture points table below carries the dry standard alongside the daily readings for exactly that reason, and flags each point once the latest reading reaches it.

Dates that line up. The equipment lines say four air movers and one dehumidifier were on site from the fourth to the seventh; the readings say a technician was in the building on the fourth, fifth, sixth and seventh. When one of those days is missing, the unit-days for that day get questioned, and rightly so. The mitigation report view below is built around that reconciliation: dates, days logged, unit-days by type, and points at goal on one page.

The second thing is justification for scope. A file that records Category 3 and the removal that followed, with the evidence for the Category written down, survives review. A file that shows removed drywall with no Category reasoning and no cavity readings invites a request to explain why it came out. Numbers cost nothing to record on the day and are impossible to reconstruct afterwards.

Every day the equipment is running, at roughly the same time, at the same numbered points, with the same meter. Two readings from the same point taken with two different meters are not comparable, and a point read at the doorway on Monday and mid-wall on Tuesday produces a trend that does not exist. Number the points on a moisture map so the next technician on the job reads the same spots.

Two flat days in a row is the signal to change something rather than wait. The usual causes are a chamber that is not closed, a dehumidifier that is undersized or iced, surfaces too cold to evaporate, or trapped water behind a material nobody has opened. Record what you changed and why in the notes, because an unexplained jump in readings on day four looks like an error and an explained one looks like control.

The report is the summary an adjuster reads first: who and where, date of loss and mitigation start, the Category and Class with the basis for each, what was removed and why, the drying conditions maintained, the moisture points and whether they reached their goals, equipment by type with unit-days, and the completion date with a signature. The report print view here assembles those from what you entered without retyping any of it.

Keep the full drying log attached behind it. The report is the argument; the log is the evidence. A report with no log behind it is a claim, and a log with no report in front of it makes a reviewer do the work themselves — which usually ends with fewer approved days.

• No dry standard. Readings with nothing to compare them to cannot show a material is dry and cannot justify a completion date.
• Reading different points each day. Unnumbered points make the trend meaningless even when the drying went perfectly.
• No intake and exhaust readings. Without grain depression, a dead dehumidifier bills for the same unit-days as a working one.
• Equipment dates that do not match visit dates. The most common reason unit-days get cut in review.
• A log written at the end of the job. Identical handwriting, identical spacing and suspiciously even numbers across four days are noticed.
• No note when something changed. Windows opened by the occupant, a unit unplugged, a cavity opened on day three — each explains a reading that otherwise looks wrong.

GPP in the table is calculated from your temperature and relative humidity with the same psychrometric math used by the free GPP and psychrometric calculators, at sea-level pressure. At elevation the same temperature and humidity carry different grains, so use the elevation input on the calculator pages when the job is well above sea level and enter that value here.

For the reasoning behind chamber control, grain depression and why the affected-to-unaffected gap is the number that tells you whether the drying is progressing, the structural drying guide walks through it in full.

Running more than one job at a time? Restoration software can keep the readings, photos and report on one job record — check any app against what it needs to hold before it replaces this log.