Moisture Intrusion

Moisture Intrusion2023-10-23T13:49:23-05:00


A moisture intrusion investigation searches for the source of the moisture problem. We have the necessary tools, including thermal imaging cameras, moisture meters, professional hygrometers, and multiple ladders necessary to access any curious points in your home where moisture may be entering. 

Moisture Intrusion Blogs

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“Tom was great to work with; I called him specifically about a moisture inspection. He took the time to talk to me throughout the process to let me know exactly what he was doing. I’ve never had that type of experience with an inspector & appreciated the time so much. I feel like that is super unique in his business. Would highly recommend using him for your next home inspection!”

Kate S., Blaine

“Tom was very thorough and great at explaining the potential issues/causes of our water damage.”

Emily A., Edina

Standard Moisture Intrusion Investigation

$300 (up to 3,000 sq ft)

This service includes a limited investigation of a specific part of a property. It includes identifying the source of a moisture problem (if possible) using special moisture-detecting equipment such as thermal imaging cameras, moisture meters, and hygrometers. You will receive an email summary of our findings, photos depicting areas of concern, with clear, easy-to-read recommendations within 24 hours. This investigation typically takes about an hour on-site. (If this investigation is added to a home inspection service, the fee is reduced to $200.)

Comprehensive Moisture Intrusion Investigation


This service goes above and beyond our standard moisture intrusion investigation by digging deeper into multiple areas of the property. This may include investigating the attic, exterior, crawl space, basement, bathrooms, and the roof if necessary. We have industry-leading equipment such as thermal imaging cameras, moisture meters, and professional hygrometers, with the ability to access many hard-to-reach points in your property where moisture may be entering. Your report will include a detailed summary of our findings, photos depicting areas of concern, and clear, easy-to-read recommendations. This investigation usually lasts 3-4 hours on-site; you can expect to receive your report within 48 hours.

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What is moisture intrusion?2020-02-16T11:57:58-06:00

The term refers to unintended moisture that enters through the “Building Envelope”.  The building envelope consists of the exterior shell of your home that’s designed to repel the elements. Examples include: the roof, basement, windows & doors, exterior walls and the drainage plane, foundation waterproofing, exterior house wrap, ice and water shield, and roofing felt, that is behind the exterior finishes. Moisture intrusion can be obvious and easily found or very subtle and require instruments and testing to locate the source.

How is moisture entering my home?2020-02-16T12:03:53-06:00

There are three main “moisture transport vehicles” that create avenues and allow water into your home.

1. Bulk Water Movement

The most common moisture intrusion issues I see in Twin Cities’ homes are a result of “bulk moisture movement”, also known as liquid flow (rain, snow, ground water). This type of intrusion is typically immediate, easily discovered and also the most damaging. Three conditions are required to allow bulk moisture flow into a building: 1) a source of water 2) an opening or failure in the drainage plane of the building and 3) a driving force such as gravity or pressure.

2. Capillary Action

Capillary action refers to the ability of water to travel up against the pull of gravity through a porous material. It works because the friction of the moisture against the wall surface (adhesion to the wall) actually exceeds the cohesive forces between the water molecules. Although not as serious as bulk water movement, capillary forces are both destructive and secretive, since they often work and accumulate in commonly unobserved areas. They can potentially cause significant damage over a period of time without a homeowner’s knowledge.

3. Air Transported Moisture and Diffused Air Flow

Air-transported moisture (water vapor hitchhiking on air) can leak into, or out of buildings. Both uncontrolled pressure sources (wind) and controlled sources (fans and air handlers) can move significant amounts of moist air past a home’s exterior through openings and improperly flashed transitions. A similar process known as “diffused air flow” forces small amounts of moisture in the form of water vapor to pass directly through a building’s envelope. The amount of diffused air flow (vapor) that occurs in a home is determined by two things: the driving force that pushes it and the permeability of the building material the vapor is passing through.

I think my home has a moisture issue, what’s next?2020-02-16T12:10:07-06:00

Eliminating moisture intrusion sources as early as possible is critically important in caring for your property. Examine your house regularly to look for any new staining or moisture. Sometimes, your nose can be a good guide. If you smell a musty odor, follow your nose and see if you can find a probable cause.

If you know moisture is coming in, but can’t find it, it’s time to bring in the professionals.  The longer you wait to solve a moisture intrusion source, the more expensive the fix becomes.

To assist our clients, Branch Property Investigations provides specific moisture intrusion testing, inspection and consulting services for property buyers and owners to verify that building envelope systems have been installed correctly. We have nearly 25 years experience solving moisture issues. For more information, contact us at (612) 440-8466 or schedule a “Moisture Intrusion” investigation online.

I’m worried that moisture is leading to mold growth, what should I do?2020-02-16T12:18:06-06:00

Branch Property Investigations performs mold testing in residential homes and commercial buildings. So what makes our company unique? We apply 20+ years experience as a mold remediator and water loss specialist to identify likely locations for mold growth. If desired, we can perform a detailed moisture investigation of the entire home as an added service to mold testing. It is important to not only find the mold problem but also understand why it is growing and to eliminate the moisture source so it won’t reoccur. We don’t perform remediation work so we don’t have any conflicts of interest.

To learn more, visit our Mold Testing page to learn more about our different service offerings and frequently asked questions pertaining to mold.

What cities are included in your service area?2022-08-24T10:08:44-05:00

We service the Twin Cities and surrounding metro area including, but not limited to the following cities: Eden Prairie, Chanhassen, Chaska, Maple Grove, Plymouth, Minnetonka, Wayzata, Minneapolis, St. Paul, Hopkins, Edina, Richfield, Shakopee, Savage, Prior Lake, Bloomington, Burnsville, Eagan, Apple Valley, Lakeville, Rosemount, Woodbury, Oakdale, Maplewood, Roseville, Blaine, Golden Valley, and St. Louis Park.

If you are outside our normal service area (35 miles any direction from our home base in Chanhassen), an additional travel fee may apply and will be visible to you in the online scheduler. Please don’t hesitate to call (612) 440-8466 or email with specific questions!


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