Moisture Readings Log for Warehouse Drying Projects

What the log is for

A drying building changes slowly, and not always in one direction. A slab can read better one morning and worse the next after a humid night or an open door. The log records what you measured, where and under what conditions, so decisions about equipment, materials and finish dates rest on something solid.

Even when a professional takes the formal readings, a simple parallel log kept by the facility team pays off. It confirms readings are happening, captures the operational events that change conditions, and gives the team its own view of progress.

Review the log once a day with the person running the drying. A short meeting to look at trends, ask what changed and decide whether equipment should move works far better than letting numbers pile up unread. Write the decisions beside the numbers: moved two fans, opened a wall section, kept a dock door shut through a humid afternoon. Months later, when someone asks why drying took as long as it did, readings plus decisions answer the question better than memory can.

Log layout

Copy into a spreadsheet and add rows as you go.
Date and time	Point ID	Material
Day 1, morning	S-01	Concrete
Day 1, morning	W-03	Drywall
Day 1, morning	A-01	Air
Day 2, morning	S-01	Concrete
Day 2, morning	W-03	Drywall
Day 2, morning	A-01	Air

Setting it up

Sketch the floor plan and mark the point IDs on it.
Pick points in both wet and dry areas, so you have a baseline.
Take wall readings at several heights.
Use the same instrument on the same point every time you can.
Read at about the same time each day.
Note anything unusual: open doors, equipment changes, weather.

Point ID system

S-points: Slab points on the floor, spread across wet and dry zones.
W-points: Wall points on drywall or other wall surfaces, at marked heights.
A-points: Air readings for temperature and relative humidity.
B-points: Baseline points in an unaffected area, used for comparison.

Questions for the daily review

Take these to whoever is running the drying.

Which points are heading toward the baseline, and which have stalled?
What changed between readings at the stalled points?
Are there areas where materials should come out instead of being dried?
Which reading range will count as finished?

Common questions

How many points do I need?

It depends on the area. Start with enough to represent each zone and material, plus the baselines.

Should I share the log?

Share it with the contractor, the insurer and the repair professionals as needed, so everyone works from the same record.

General information for Commerce City, not a quote or professional advice. In an emergency, call 911.