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"Excellent service and was able to diagnose our problems would recommend "

Rosemary K on June 2025

I have retired from doing home inspections but I am still doing mold testing as a certified tester and foundation inspections.

"Excellent service and was able to diagnose our problems would recommend "

Rosemary K on June 2025


Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018


Avatar for Moldlab

Moldlab

4.74(
352
)

Moldlab

4.74(
352
)
Customers say: True professional
25 years of experience

Mold identification, mold test kits and testing supplies. If you suspect you have a mold problem give us a call toll free and we can walk you through your testing options.

"The self-test product was as expected. The reports require additional research to interpret and understand, so seemed more targeted at professionals."

Jessica H on February 2018

Mold identification, mold test kits and testing supplies. If you suspect you have a mold problem give us a call toll free and we can walk you through your testing options.

"The self-test product was as expected. The reports require additional research to interpret and understand, so seemed more targeted at professionals."

Jessica H on February 2018


Avatar for ARC Contracting of Wisconsin Inc

ARC Contracting of Wisconsin Inc

4.14(
51
)

ARC Contracting of Wisconsin Inc

4.14(
51
)
Customers say: Quality work
19 years of experience

At ARC Contracting, we want to redefine the experience you have with your sales person, your contractor, and the support you get along the way. ARC Contracting specializes in residential and commercial full-service exterior contracting, including roofing, gutters, soffit, facia, windows, siding, insulation, and solar.

"Typically I don’t write reviews. However, the process of our project was very poorly managed by ARC despite the reassurance that we would have a project manager. We never saw a project manager through the whole process. We had to manage through many issues and rework, from the wrong color siding being put on, to water coming in my kitchen from the roof not being wrapped correctly and nails sticking out of the roof. From the edging not being finished and siding that covered our cable to siding that was cut in corners for some reason to poor calking and beyond. We had to manage and call or email the issues at every step of the way because no one was here managing the project. The final straw was when they were here to finally fix the issues they were nailing siding into a wall and broke the tile in our bathroom. I asked for ½ of the $5K that I had paid to have my shower tiled since the tile was discontinued and it would be roughly $8K to have it redone today. I thought I was being fair, but this is what I got back: “Again, I apologize. It is not an excuse, but with the transition of some key employees things weren't managed correctly. I would be upset if I was in your position. I would have a hard time recommending ARC also. I did talk with management and we will discount $1,000 for the shower with the understanding there won't be a negative review left online. I don't expect a 5 star review online since you didn't' have a 5 star experience. Does that sound fair?” This is not a company that stands behind their work or their word. I would not recommend them as in a previous email I was told: “I am having a hard time to justify a $2,500 discount to my management for a few tiles that may have broken from siding installation.” They MAY have broken? I’m lying? They also asked me to put in an “accent” color where it broke, where there is no other accent tiles and would look horrible. Thank you, but I loved my shower and now it looks horrible and will need to redo the entire shower. But you can’t buy a good review from me as the $1K is not worth it to me (and yes I was told that they have insurance, so they should have it covered). I have attached pictures that show only a portion of the crappy work that we had to have them redo. Shame on you ARC, I went with you despite you being more expensive than another company because of what you promised. Stand behind your word and your work. Very unhappy customer. Wanitta Charnon"

Wanitta C on April 2025

At ARC Contracting, we want to redefine the experience you have with your sales person, your contractor, and the support you get along the way. ARC Contracting specializes in residential and commercial full-service exterior contracting, including roofing, gutters, soffit, facia, windows, siding, insulation, and solar.

"Typically I don’t write reviews. However, the process of our project was very poorly managed by ARC despite the reassurance that we would have a project manager. We never saw a project manager through the whole process. We had to manage through many issues and rework, from the wrong color siding being put on, to water coming in my kitchen from the roof not being wrapped correctly and nails sticking out of the roof. From the edging not being finished and siding that covered our cable to siding that was cut in corners for some reason to poor calking and beyond. We had to manage and call or email the issues at every step of the way because no one was here managing the project. The final straw was when they were here to finally fix the issues they were nailing siding into a wall and broke the tile in our bathroom. I asked for ½ of the $5K that I had paid to have my shower tiled since the tile was discontinued and it would be roughly $8K to have it redone today. I thought I was being fair, but this is what I got back: “Again, I apologize. It is not an excuse, but with the transition of some key employees things weren't managed correctly. I would be upset if I was in your position. I would have a hard time recommending ARC also. I did talk with management and we will discount $1,000 for the shower with the understanding there won't be a negative review left online. I don't expect a 5 star review online since you didn't' have a 5 star experience. Does that sound fair?” This is not a company that stands behind their work or their word. I would not recommend them as in a previous email I was told: “I am having a hard time to justify a $2,500 discount to my management for a few tiles that may have broken from siding installation.” They MAY have broken? I’m lying? They also asked me to put in an “accent” color where it broke, where there is no other accent tiles and would look horrible. Thank you, but I loved my shower and now it looks horrible and will need to redo the entire shower. But you can’t buy a good review from me as the $1K is not worth it to me (and yes I was told that they have insurance, so they should have it covered). I have attached pictures that show only a portion of the crappy work that we had to have them redo. Shame on you ARC, I went with you despite you being more expensive than another company because of what you promised. Stand behind your word and your work. Very unhappy customer. Wanitta Charnon"

Wanitta C on April 2025


Avatar for A+ Environmental Inc

A+ Environmental Inc

5.00(
7
)

A+ Environmental Inc

5.00(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

A+ Environmental is a family run business with over 25 years of professional waterproofing experience. We offer quality guaranteed work at affordable prices. Our estimates are free and our work is backed by a Lifetime Transferable Warranty. We offer exceptional basement waterproofing and foundation repair services to all of our satisfied customers. We look forward to helping you with all of your basement waterproofing and foundation repair needs. Remember: If you want to stay dry, give us a try!!

"The project went very well! Mike is terrific. The crew came as scheduled. Explained what they would be doing and did a nice job.The first part of the project involved trenching the basement floor along the three walls. This was the dusty and loudest part of the work since they use electric jack hammers. Make sure you cover everything. They did a great job cleaning up the area they worked in but you will still have dust. We had a minor problem and came to a mutual agreement for solution. Nice people to work with, great job!"

Joe W on March 2020

A+ Environmental is a family run business with over 25 years of professional waterproofing experience. We offer quality guaranteed work at affordable prices. Our estimates are free and our work is backed by a Lifetime Transferable Warranty. We offer exceptional basement waterproofing and foundation repair services to all of our satisfied customers. We look forward to helping you with all of your basement waterproofing and foundation repair needs. Remember: If you want to stay dry, give us a try!!

"The project went very well! Mike is terrific. The crew came as scheduled. Explained what they would be doing and did a nice job.The first part of the project involved trenching the basement floor along the three walls. This was the dusty and loudest part of the work since they use electric jack hammers. Make sure you cover everything. They did a great job cleaning up the area they worked in but you will still have dust. We had a minor problem and came to a mutual agreement for solution. Nice people to work with, great job!"

Joe W on March 2020


Avatar for Emergency Restoration Specialists Inc

Emergency Restoration Specialists Inc

4.59(
17
)

Emergency Restoration Specialists Inc

4.59(
17
)
Customers say: Super punctual
34 years of experience

Receive immediate contact with a company representative 24/7/365 days, no voicemail or answering service. We provide 2 hour or less emergency on-site response. After an inspection you will receive a detailed, unit price estimate along with insurance claim assistance. All employees' background checked through third-party service. Contact our Emergency Response Team Hotline at (414) 571-9977 or Toll-Free (877) 422-6379.

Receive immediate contact with a company representative 24/7/365 days, no voicemail or answering service. We provide 2 hour or less emergency on-site response. After an inspection you will receive a detailed, unit price estimate along with insurance claim assistance. All employees' background checked through third-party service. Contact our Emergency Response Team Hotline at (414) 571-9977 or Toll-Free (877) 422-6379.



Northstar Environmental Testing LLC

5.00(
4
)

Northstar Environmental Testing LLC

5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We at NorthStar pride ourselves on providing practical and economical environmental consulting services. NorthStar focuses on indoor environmental concerns including, but not limited to: Asbestos, Lead Paint, Mold, Industrial Hygiene and Personal Exposure Monitoring. Our goal is to provide the perfect service our client requires at a cost they can afford.

We at NorthStar pride ourselves on providing practical and economical environmental consulting services. NorthStar focuses on indoor environmental concerns including, but not limited to: Asbestos, Lead Paint, Mold, Industrial Hygiene and Personal Exposure Monitoring. Our goal is to provide the perfect service our client requires at a cost they can afford.


E & J Builders

5.00(
2
)

E & J Builders

5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

E & J Builders has been in business for 9 years that is certified, licensed and insured. We also are licensed in lead, asbestos, and mold removal. Winter months we also plow and offer snow removal. Free estimates and Work all year round.

E & J Builders has been in business for 9 years that is certified, licensed and insured. We also are licensed in lead, asbestos, and mold removal. Winter months we also plow and offer snow removal. Free estimates and Work all year round.


Airtite Environmental Services, LLC

5.00(
3
)

Airtite Environmental Services, LLC

5.00(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Airtite Environmental Services LLC is a family owned environmental company. We pride ouselves in offering quality service, excellent customer service, affordable prices & timely completion of jobs.

"Jo is a 100% top notch professional. PROMPT, FAIR, and most of all HONEST. The VAT in my 1,000 sq. ft. basement is gone. The black mastic is gone. He did an INCREDIBLE job. I couldn't have asked for a better experience. If you are considering Asbestos abatement, LOOK NO FURTHER. THIS IS WHO YOU NEED TO CALL. Jo and his company (Airtite Environmental Services LLC) will provide you with an honest quote, do honest work, and follow-through on his commitments with no bs, and no sale-sy crap. If I could rate this business higher than 5 stars, I would. I am grateful I found Airtite, and grateful to have hired them."

Alex P on February 2021

Airtite Environmental Services LLC is a family owned environmental company. We pride ouselves in offering quality service, excellent customer service, affordable prices & timely completion of jobs.

"Jo is a 100% top notch professional. PROMPT, FAIR, and most of all HONEST. The VAT in my 1,000 sq. ft. basement is gone. The black mastic is gone. He did an INCREDIBLE job. I couldn't have asked for a better experience. If you are considering Asbestos abatement, LOOK NO FURTHER. THIS IS WHO YOU NEED TO CALL. Jo and his company (Airtite Environmental Services LLC) will provide you with an honest quote, do honest work, and follow-through on his commitments with no bs, and no sale-sy crap. If I could rate this business higher than 5 stars, I would. I am grateful I found Airtite, and grateful to have hired them."

Alex P on February 2021

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FAQs for mold testing and remediation projects in Markesan, WI

Some states require mold removal specialists to be licensed, while others require licensed mold testing companies to create remediation protocols that any contractor can carry out. You can use our state licensing tool to find requirements in your area. In either case, it’s imperative that you hire an experienced professional for mold removal to ensure the safety of your home and your family.

It’s possible to scrub mold off of visible surfaces yourself, but it’s not usually a good idea. Mold is not only a potential health risk, but it’s also difficult to treat in its entirety, especially because it can grow behind walls and in other hidden areas a DIYer might miss. Since mold is a serious and often pervasive issue, you should hire a professional that will remove all of the mold—including any that might be hidden—run industrial air scrubbers to remove airborne particles, and complete mold testing to ensure the underlying problem is solved.

The most effective way to remove mold includes testing affected surfaces and the air for spores, creating a protocol for removal, carrying out the steps within the protocol, running air scrubbers for the recommended amount of time, and then completing a post-remediation round of testing to confirm the issue is solved. Since this work is very involved and there are health risks if done incorrectly, you should always hire an experienced professional to handle mold removal.

The average cost for mold remediation is around $2,200, and most projects fall somewhere between $1,100 and $3,300. Your total will depend on many factors, including the surface area that is affected by mold, the extent of the issue, how much building material your professional needs to replace, whether or not testing is necessary for safety reasons, and existing indoor air quality.

Mold removal will take between one and five days in most cases, but severe mold issues can take several weeks to correct. Your timeline will depend on how much mold there is in your home, where the mold is located, and how much testing and aftercare is required. If you have mold behind your walls or you have an excessive amount of mold that requires removal and running air scrubbers for several days, you could be looking at over a week for the process to be completed.

The Markesan, WI homeowners’ guide to mold testing and remediation services

From average costs to expert advice, get all the answers you need to get your job done.