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Find Mold & toxic material testers in Jefferson

Avatar for Criterion Home Inspectors LLC
Criterion Home Inspectors LLC
4.9(
23
)

Serving Jefferson, WI and surrounding areas

In business since 2006

Free estimates

Credit card accepted

"When I started working real-estate for family and friends in the Eastern part of Wisconsin, a dear friend and referral partner realtor, of mine, recommended Criterion Home Inspectors. I met Scott and was immediately impressed. I had outstanding inspectors back in South Central Wisconsin that had set the bar for HIGH expectations. Scott hit that bar and I've never looked back. Anytime my other inspectors are on vacation, I always give Scott for the opportunity to come over to do the inspection because I know he is going to have integrity, be straightforward, doesn't the report to cover his butt, not an alarmist, and definitely NOT a 'dollar' store inspector. He explains things in layman's terms to the buyers,(and sellers for pre sale inspections) answers all their questions. And if he doesn't know something, he says so and that he will find out, and DOES. Just a great guy and resource for new buyers and seasoned realtors. We highly recommend Scott!!"
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+10

Recommended by95%of homeowners
Avatar for Ganser Co Inc
Ganser Co Inc
4.4(
129
)

Serving Jefferson, WI and surrounding areas

In business since 1939

Free estimates

"We were very pleased with the work done wrapping our old rotted windows and installing new gutters. Effort was taken to match existing trim and siding. Our only complaint was that we had to wait quite a while for the work to be done, but we are very happy with the finished product."
Infinity Fiberglass Window from Marvin
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+16

Recommended by82%of homeowners
Avatar for A+ Environmental Inc
A+ Environmental Inc
5.0(
7
)

Serving Jefferson, WI and surrounding areas

In business since 1985

Free estimates

Warranties offered

"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!"
Diagram of Drainage System
Recommended by100%of homeowners
Seagull Enterprises
4.0(
7
)

Serving Jefferson, WI and surrounding areas

In business since 1999

Free estimates

Emergency services offered

Seagull Enterprises has been in business for 11 years. We are licensed and insured. Providing professional services at affordable prices. We strive to make every customer happy, repeat customers are common, references are available. Providing roofing, Siding, Masonry, Foundation and basement repair and waterproofing. \nAll remodeling and restoration specialist. Free Estimates. \nNo sub-contractors. Licensed and insured. Call today.

Recommended by71%of homeowners
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FAQs for mold & toxic material test projects in Jefferson, WI

Some companies offer a no‑cost phone or video consultation that screens for red flags. If the discussion points to a real issue, the pro will recommend a paid on‑site inspection. The complimentary call clarifies whether you need full testing, but it isn’t a substitute for samples, lab work, or a written report. Always confirm what the free service covers before you schedule.

A standard inspection, which includes basic air and surface samples, takes an average of two hours. If the pro needs to probe hidden spaces, such as wall cavities or ductwork, plan on up to six hours. Extra time allows the inspector to reach tight areas, collect additional samples, and document findings. Lab analysis is a separate process and often adds several business days to the overall timeframe before you receive the full report.

Mold thrives where moisture lingers and air flow is poor. Common hotspots include bathroom walls, kitchen backsplashes, window sills, HVAC vents, fireplaces, crawl spaces, and enclosed attics. Check these areas regularly—especially after leaks or high‑humidity weather—to catch growth early and avoid costly repairs.

Unchecked mold can knock 20% to 37% off a home’s market value because buyers worry about hidden damage and health risks. Even after remediation, visible staining or a history of major moisture issues can still lower offers and prolong the time on the market. Addressing mold quickly protects both your property’s structural integrity and its resale appeal.

The Jefferson, WI homeowners’ guide to mold & toxic material tests

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