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Find Mold & toxic material testers in Philadelphia

Avatar for PuroClean of Newtown Square
PuroClean of Newtown Square
5.00(
6
)

Angi Approved

In business since 2023

Free estimates

Emergency services offered

"Tyler came over to assess basement moisture and he thoroughly inspected the area and shared his professional opinion. It didn't involve him doing anything at first--the step is to call a plumber. He didn't charge for his time and insight, and I was really impressed by that."
Recommended by83%of homeowners
Avatar for SIS Mold & Home Inspections
SIS Mold & Home Inspections
5.00(
2
)

Angi Approved

In business since 2015

Free estimates

Customers say: Quick response

"Bob from SIS is a straight shooter, provides options, clear explanations and associated costs on the necessary steps to remediate the problem. Good communication, timely and professional. Pleasantly surprised with my experience with SIS and the contractor they recommended to do the work. Easy 5-star rating, not too common these days."
Recommended by100%of homeowners
Avatar for The Radon Bros LLC
The Radon Bros LLC
4.73(
13
)

Angi Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"We had our radon fan replaced by Radon Bros in January 2025. From the beginning, the new fan was noticeably louder than the previous one. At that time, the technician advised us that the increased noise was due to the fan being stronger than our prior unit. Over time, the fan became increasingly louder and ultimately stopped working in early December 2025. When a technician returned to replace the fan, we were informed that the fan originally installed was defective and that Radon Bros had stopped using that manufacturer due to known issues. Despite this, we were charged a $99 labor fee for the replacement. We do not understand why we were responsible for this charge when the failure was due to a defective fan that your company was already aware of and no longer installs. We felt we had no choice but to pay the $99 in order to have our radon mitigation system restored and functioning properly. "
181 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for Aerotek Environmental, LLC
Aerotek Environmental, LLC
4.81(
196
)

Angi Approved

In business since 2003

Free estimates

Emergency services offered

"Straight forward and efficient, great communication, costs transparent. When presented with challenges of temporary electricity outage was resourceful and creative to get the job done even more than predicted. Cleaned up after work done. Respectful and honest. Would highly recommend! I should have had them do this work years ago, glad I worked with Luis & Steve!"
25 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Bioclean
Bioclean
4.97(
19
)

Angi Approved

In business since 2003

Free estimates

Customers say: Quick response

"BioClean has gone above and beyond in their service to our home. Tim is a great guy, and he is extremely knowledgeable. Tim caught the actual extent of our mold and asbestos problems when others in the industry did not. I would give BioClean more than 5 stars if I could!"
8 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for mold & toxic material test projects in Philadelphia, PA

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 Philadelphia, PA homeowners’ guide to mold & toxic material tests

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