Restoration logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Restoration logo
  • NEWS
  • PRODUCTS
    • New Products & Technologies
    • Submit Your Product
    • Interactive Product Spotlights
  • EDUCATION
    • KnowHow.
    • Podcasts
    • Trade Shows & Expos
    • Training & Certification
    • Webinars
    • Whitepapers
  • TOPICS
    • Water Damage
    • Fire & Smoke Damage
    • Mold
    • Contamination
    • Odor
    • Contents
    • Architecture
    • Catastrophe
    • Cleaning
  • BUSINESS
    • Managing Your Business
    • Insurance/Legal Matters
  • BUYER'S GUIDE
  • VIDEOS
    • Ask Annissa
    • Ask the Expert
    • Ironclad Marketing Minute
    • TradeTalks
    • Video Channel
  • INFOCENTER
    • Mold and Mycotoxins
  • THE EXPERIENCE
    • Conference & Exhibition
    • Convention & Trade Show
    • R&R Special Issue
  • EMAG
    • eMagazine
    • Archive Issues
    • Contact
    • Advertise
  • SIGN UP

Do You Measure Up?

By Chuck Boutall
January 5, 2011


So where do you write down all your readings? I mean, you do take readings on every job, right? Besides just being foolish, having poor or no paperwork means you did not perform the task allotted.

You would be unable to prove in mitigation or in the courtroom that a successful drying project was completed. You probably would not get your full payment, and what if a mold claim was to develop soon after? You might find out what your own insurance policy limits are on liability and pollution insurance! For the minimal documentation required on each water damage restoration project, please refer to the IICRC S500 3rd Edition, section 8 and chapter 10. 

The questions “Is it dry?” and “Is it drying?” can only be determined by our IMDs, or “Instruments of Moisture Detection.” They sound powerful, but none of them, including the old “Hand-O-Meter” which many profess to possess, detect moisture directly. All of our instruments use some form of mechanical measurement of weight, density, electrical resistance or temperature of the material in question, and then interpret these readings and present them on a chart, scale or a graphic image. Let’s look at a few of the most popular types available.

Invasive Meters

These units generally use electrical resistance between the two pins to interpret a reading on our percent wood moisture content by weight (a.k.a. Wood Moisture Equivalent) or qualitative (relative) scales (always indicate what scale you are using and stay with it). The more current that is passing between the pins, the higher the reading on the meter’s scale. So keep the pins clean and batteries fresh, or a lower-than-designed current may pass, causing you to have artificially low readings (false dry). This conductance is also why sill plates consisting of pressure treated lumber often read higher than the plywood subfloor or studs, due to their increased level of copper in the treatment process.

These meters are very flexible. They can be used with insulated probes for moisture readings of insulation in walls or wood at various depths in flooring. Some manufacturers provide extension cables, and their probes can be mounted on telescoping and pivoting painters’ poles for reaching high ceilings or reducing back bending along the base in a large commercial project. You can use screws and nails to extend your reach like I and many others do, but make sure they are stainless, and talk to your meter provider about any corrections for continuity. Unless you have a meter with adjustable material temperature capability, you need to use a correction table for low or high temperatures on wood for an accurate reading. WME stands for Wood Moisture Equivalent.

Drywall is usually dry in the range of 0.2-0.5% moisture content by weight, and may be measured on this scale, but it must be noted WME. Meters with adjustable material temperature capabilities, like the Delmhorst Navigator Pro, will have multiple construction materials in their database.

Non-Invasive Meters

These meters leave no holes because they use either radio waves or capacitance for their interpretation. They display readings ranging from 0-100, 1-300, 200-300, etc. depending on meter brand and model. Again, this is why every meter model must have its own dry standard for the construction materials in your area, and why you always need to indicate which meter and scale you are using on your paperwork.

The average non-invasive meters are usually limited to reading depths of 0.75” to 1” and cannot read through air. Items like wood subfloors beneath thicker floors, e.g. hardwood flooring or ceramic tile and cement board, cannot be accurately determined by the average non-invasive meter.

When getting a high reading on wood subfloors below vinyl flooring, let the vinyl floor dry for a day then measure again. Sometimes a thin film of moisture is present even after towel drying, so the meter gives you a high reading which leads you to believe the subfloor is wet. So confirm the subfloor is still wet the next day before removing the vinyl to dry the subfloor. You will save many more floors this way.

IR Cameras

The newest and truly the coolest meters to come in to our industry is the thermal imaging camera. This device allows us to see temperatures like Predator can but, just like we learn in Predator 2, seeing temperature does not by itself win the battle!

When taught to use this camera properly, we can look for and usually find the temperature or heat signature of water. Whether looking for warm spots after sunset in a roof leak, or looking for the signature cooling affect of water evaporating off the surface of a material, a trained eye is required for this tool to reach its full potential.

False positives like the photo of steel studs in an exterior wall are annoying. False negatives, like a wet material that is not seeing evaporation due to vapor retarder on the surface, are potentially disastrous if overlooked. Always double check suspicious readings and never use just an IR camera for drying completion documentation.

The latest time-saving feature today’s cameras are incorporating is capturing moisture content and atmospheric readings and recording them on the digital image. These readings can be recorded via Bluetooth between the camera and a thermo-hygrometer moisture meter; FLIR/Extec is one company whose equipment has this capability. Just make sure you download your images because, as with any digital tracking system, loss of data can occur.

As always, the last and best word here is training; courses on equipment operation are offered by manufacturers, and there are many excellent instructors out in the industry well versed in a number of different technologies. Ask your supplier for their recommendation and begin boosting your moisture measurement I.Q. today!

  Author’s Note: I hoped you liked, but did not record, the temperatures we talked about in the last article! Although one has to agree that a building would dry very fast at 400F and even faster as it burned at 950F, that article would make a whole lot more sense if those temperatures had read 40F and 95F, respectively. Funny what can happen when innocent superscripts – °, as in 40°F – are accidentally reformatted as “0” in the editing process, isn’t it? Thanks for reading!  
KEYWORDS: restoration services

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

Charles A. Boutall II, (Chuck) joined the Restoration Industry in 1988 and took his first IICUC courses from Claude Blackburn, Jeff Bishop, Ruth Travis and Jim Caulfield. He has been an IICUC-RC member since 1988 except for two years. He is a native of New Orleans and has an Associates in Electrical Engineering. 

He is co-owner of Air Quality Specialists which provides
Courses and Consulting in Commercial losses with a specialty in Timber and Concrete Drying as well as Climate Control for Surface Preparation and Coating Projects. AQS focuses on IICR’s WRT & CDS courses and several Specialty Restoration courses approved for IICRC’s Continuing Education Credits.

Presently Chuck is Director of Education at The Restoration Technical Institute in Reading, PA. Here he trains with some of the best instructors in the industry and enjoys the ability to have a Three story 1890’s Fabric mill as a lab and hands on training facility.

He began his career as a Product support Representative at Xerox in New Orleans then to San Jose, CA as a Sr. Field Engineer for National Semiconductor Corporation providing Installation and Repair of Mainframe computers and Laser Barcode Scanning systems for the US military all the way to Grocery stores.

At Munters Cargocaire Corporation he was a District Manager for the Moisture Control Services division then moved on to Sr. Application Engineer for Consultation, design and build of dehumidification projects throughout the US and Central America. Here Chuck provided dehumidification services ranging from dog food drying to climate control on Nuclear submarines and the Space Shuttle.

Moving on to Sponge-Jet Inc. Where he planned and implemented the start-up of a new low – dust blasting technology in the Southern United States.

Afterwards, Chuck was National Sales Manager at Eagle Industries – Containment & Abatement Products, where he directed Product Development and new product launches.

He was also owner of Air Quest Systems, a Manufacturer of Custom Desiccant Dehumidifiers, Large Refrigerant Dehumidifiers and Custom Portable Air Conditioning and Heating systems.

Chuck is probably best known for his no nonsense style of Speaking at the Water Strategies Cruises, Dri-Eaz’s Restorative Drying Symposiums, the Water Loss Institute, ASCR National, Connections East and West, DRC Canada, Experience East & West and moderator of Specialty Drying Roundtable on the Water Strategies Cruise. 

He has also written a series of articles about Commercial Drying for Restoration and Remediation Magazines.

I have dried millions of square feet of structure, hundreds of thousands of books and documents and designed permanent systems for various manufacturing and storage projects over my 31 year career as an Application Engineer.

Recommended Content

JOIN TODAY
To unlock your recommendations.

Already have an account? Sign In

  • mold remediation

    Fighting Mold and Bacteria Damage

    Successful mold remediation can be multidisciplinary,...
    Mold Remediation
    By: Josh Woolen
  • certifications and licenses for restoration professionals

    Certifications and Licenses Every Restoration Company Needs

    Restoration companies need to make sure they have the...
    Restoration Training/Education
    By: Sharon Elzarat
  • a wall covered in moss and fungus

    Zero Tolerance for Toxic Molds: Essential Steps for Successful Remediation

    Understanding the importance of zero tolerance for toxic...
    Mold Remediation
    By: Michael A. Pinto CSP, SMS, CMP, RTPE, FLS, ERS and Kendra Seymour
You must login or register in order to post a comment.

Report Abusive Comment

Subscribe For Free!
  • eNewsletter
  • Online Registration
  • Subscription Customer Service
  • Manage My Preferences

More Videos

Popular Stories

wall cavity drying

Dry or Demolish? Navigating the Complexities of Wall Cavity Restoration

Ask the Expert: Unlocking Efficiency in Water Damage Restoration

Unlocking Efficiency in Water Damage Restoration

Ask the Expert: Catastrophe Panel - Back to the Basics Part 1

Catastrophe Panel – Back to the Basics Part 1

R&R Ladder Award - Submit Your Nomination

Events

September 3, 2025

The Experience Convention and Trade Show

The Experience Convention & Trade Show logoJoin us in Las Vegas for The Experience Convention & Trade Show, the leading event for cleaning, restoration, and remediation pros, packed with hands-on demos, expert speakers, and high-impact networking. Happening September 3–5, 2025 at Caesars Forum—this is where the industry comes to learn, connect, and grow!

View All Submit An Event

Poll

Restoration Services

What restoration/remediation service do you prioritize most?
View Results Poll Archive

Products

The Cleaning, Restoration, Inspection, and Safety Glossary

The Cleaning, Restoration, Inspection, and Safety Glossary

The Cleaning, Restoration, Inspection, and Safety Glossary.

See More Products
Webinar - Top Legal Tools Every Restoration Contractor Should Understand

Related Articles

  • What Keeps You Awake at Night?

    See More
  • Know Before You Coat!

    See More
  • Boutall_FT

    A Look at the Benefits and Types of Automatic Moisture Tracking

    See More

Related Products

See More Products
  • More-Answers---Part-1.gif

    More Answers Than You Have Questions About Carpet Cleaning Vol. 1

  • More-Answers---Part-2.gif

    More Answers Than You Have Questions About Carpet Cleaning Vol. 2

See More Products
×

Stay ahead of the curve with our eNewsletters.

Get the latest industry updates tailored your way.

JOIN TODAY!
  • RESOURCES
    • Advertise
    • Contact Us
    • Directories
    • Store
    • Want More
    • Submit a Press Release
  • SIGN UP TODAY
    • Create Account
    • eNewsletters
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Reprints
    • Marketing Services
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2025. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing