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Top-Rated Mold testing and remediation specialists in Marshall - Updated Nov 2026

Avatar for Advanced Foundation Repair & Replacement
Advanced Foundation Repair & Replacement
5.0(
30
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Marshall, MO and surrounding areas

Emergency services offered

"Foundation Repair - our house had to be raised about 3 inches. Frank and his crew were very professional, kept to their schedule. Frank spent extra time with my parents to explain the scope of work and minimize the disruption to their lives. His bid was very thorough and he was upfront with the fact that there could be additional cost based upon what the crew found once they exposed the foundation wall. Would definitely use him again."
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+2

Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Marshall, MO and surrounding areas

In business since 1971

Credit card accepted

"AHS is ok. They cover repairs of most everything under the roof of your house. The companies that contract with them are not always the best. You call AHS with the issue, they send a fax to the repair company and give you the contact info. If they don't contact you within 24 hours, you call them. Sometimes they answer, sometimes they don't. When they arrive (usually three days or so later), they service the item. if it has issues within the 90 days, you call AHS again, they are sent out with no charge. If the serviceman decides the unit is unrepairable, AHS will allow you to choose a replacement from their listing (usually not as good as what you have) they will install and remove your old item, or give you wholesale amount to buy and install your own. Prices vary on what you want covered and what you want the copay to be, plus where you live. For me it is 49.99 per month with a 75.00 time of service order. You can have more than one item serviced at the same time under the same fee. If you have a SEAR product the repair guys are great. Not that wild about the other ones they send out. But it is a big savings compared to calling someone on your own. The cost of service is only the 75.00 copay."
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+2

Recommended by65%of homeowners
Avatar for AllState Procontracting
AllState Procontracting
4.8(
4
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Marshall, MO and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"We were looking to replace an old, uneven patio made from railroad ties and red paver bricks.   We have been so happy with their service and the final product.  Dennis was so kind to create an estimate for us before hand.  He even came out on a Sunday to help refine our plans and estimates.  The crew was always friendly and professional.  They even tolerated our 3 dogs coming over to say "hi" everytime they were outside.  Our only complaint is that mother nature never seemed to cooperate and just wanted to rain (obviously they had little control over the weather).  There were a couple times the crew even worked through the rain and came out on the weekends to finish our project.  We have a lovely deck and porch that we are proud of and have already had a few parties to show it off.  Everyone has commented on how it has transformed our backyard and shows off the pool much better.  We already have a few project ideas that we hope to have the guys back for!"
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Pergola
Two story

+7

Recommended by100%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

Symptoms of sewer gas poisoning include nausea, dizziness, extreme drowsiness, and headaches, according to the Wisconsin Department of Health Services. Exposure to higher concentrations for long periods of time could also lead to unconsciousness due to a lack of oxygen, aka suffocation. If you think you’ve been exposed to sewer gas for a dangerous amount of time, seek medical care immediately. Do not return to the site of exposure, after you’ve received medical care, call a pro for help.

You can do a basic home water test, but we recommend having a pro conduct a more in-depth test. This method is accurate, and you’ll have a pro who knows your house helping you determine a plan of attack for anything out of the ordinary.

Mold can begin to grow in as little as 12 to 24 hours, especially if the room is warm, so drying the area is the first thing you should do after water damage. Because mold and mildew can cause a range of health issues, make sure you clean up any water damage as soon as possible and run blower fans and dehumidifiers for 24 to 72 hours to dry out the room and reduce the risk of mold growth.

Mold on window sills is common, especially in damp or poorly ventilated areas. Windows are prone to condensation, which creates the moisture mold needs to grow. Dust, dirt, and other debris on the sills can further feed mold spores. While it’s not unusual, it should be addressed quickly to prevent further growth and potential health risks.

Mold doesn’t take long to form, especially in dark, isolated areas like under the floorboards, where you’re less likely to know it’s wet in the first place. Mold can take root and proliferate in just 24 to 48 hours, but it can be up to a week before you start to notice funky smells. 

The Marshall, MO homeowners’ guide to mold testing and remediation services

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