If you’ve been noticing that damp, musty smell that just won’t go away — or you’re worried about old water damage or air quality — it might be time for a professional mold inspection.
I handle mold inspections and testing in North York, PA, and throughout the surrounding areas like West Manchester Township, York, Emigsville, and Shiloh.
You’ll get clear answers backed by real data — no scare tactics, no pressure, just straightforward information about what’s happening inside your home.
Every inspection starts with a detailed visual walkthrough of your property — not just the obvious spots. I check basements, attics, crawl spaces, HVAC systems, and around plumbing — anywhere moisture likes to hide.
Using thermal imaging and moisture mapping, I can find leaks or hidden dampness without opening walls.
If testing is needed, I’ll collect air or surface samples and send them to an independent, accredited lab for analysis.
Once the results come back, you’ll get a simple, clear report that breaks down:
What kind of mold (if any) is present
How elevated the levels are
What’s likely causing it
What next steps make sense for your situation
Everything’s written in plain language — no lab jargon or guesswork — so you’ll understand exactly what’s happening and what to do next.
Mold doesn’t always look like a big, black patch on the wall. Sometimes it’s hiding inside drywall, growing in the HVAC, or just floating invisibly in the air.
A professional mold inspection and testing service in North York, PA gives you data — not opinions.
I work with:
Homeowners concerned about air quality or musty odors
Buyers and sellers during home inspections and closings
Property managers needing documentation for tenants
A proper inspection helps you understand what’s really going on, so you can handle it the right way — calmly and confidently.
If mold shows up in your lab results, don’t stress — the goal of testing is clarity, not panic. Your report will explain what kind of mold it is, how serious it looks, and what’s likely causing it.
Because I don’t perform remediation, I have no incentive to exaggerate the problem or push you toward unnecessary cleanup. If it’s small, I’ll tell you.
If it’s something that needs professional help, I’ll point you in the right direction — without a sales pitch.
I’m Tom Duff, the owner and lead mold inspector here in York County. I’ve been doing this work for more than 17 years and have personally completed over 8,000 mold inspections across homes, offices, and commercial spaces.
My background started in restoration and environmental cleanup, back when mold inspections weren’t yet common. That early hands-on experience taught me how moisture really behaves in buildings — and how easily small leaks can become big headaches if they’re ignored.
My work’s been featured on HGTV and DIY Network, including Rescue My Renovation, where my team and I handled real-world mold inspections and cleanup projects on camera. It gave me the chance to show homeowners how professional mold testing works — and why doing it right the first time always pays off.
These days, not much has changed. I take my time, walk you through what I find, and make sure you understand the lab results before we wrap up. No pressure. No scare tactics. Just clarity and confidence.
One thing that makes me a little different from most companies in North York and throughout York County — I don’t offer mold remediation.
That means there’s no hidden motive to make things sound worse than they are, no pressure to “find” a problem, and no sales pitch waiting at the end.
My job is simple: to inspect, test, and explain what’s going on in your property. You’ll get honest results backed by real data so you can make informed choices — without the stress or upselling.
If it’s a small issue, I’ll tell you that. If cleanup isn’t needed, I’ll make that clear too. The goal isn’t to sell you something — it’s to help you understand what’s happening so you can fix it the right way, if it even needs fixing at all.
Whether you’re in North York, Manchester, or the greater York area, you’ll get the same straightforward approach: no gimmicks, no scare tactics — just reliable mold testing and real information you can trust.
I called Tom after noticing a musty smell in our basement. He showed up on time, explained everything in plain English, and actually found moisture behind a wall we never would’ve thought to check. What we appreciated most was that he didn’t try to sell us on cleanup — just told us exactly what was going on and what to do next. Definitely recommend if you want an honest inspection.
Judith - Dallastown, PA
We had some ongoing allergy issues and wanted to rule out mold before spending money on air purifiers or duct cleaning. Tom came out within a few days, ran air samples, and walked me through the results the same week. Turns out our levels were fine — he didn’t exaggerate or scare us, just gave us the facts. Really refreshing to deal with someone who’s not pushing services.
Diane - West Manchester Twp., PA
Great experience start to finish. Easy scheduling, quick turnaround on lab results, and very professional. Tom found a small leak behind our shower wall that explained the smell we’d been dealing with for months. The report helped our plumber fix it right away. You can tell he actually cares about helping people, not just making a sale. I’d absolutely use him again if we ever need testing in the future.
Robert - West Manchester Twp., PA
Homes in North York, PA deal with a mix of older construction, tight insulation, and Pennsylvania humidity — the perfect setup for hidden moisture problems.
Damp Basements & Crawl Spaces
Roof Leaks & Attic Condensation
Plumbing Leaks & Hidden Moisture
I provide mold inspection and testing throughout York County, including: North York • York City • Shiloh • West Manchester Township • Weigelstown • Emigsville • Dover • Dallastown • Red Lion • Hanover • Glen Rock • Stewartstown • Wrightsville • Hallam
If you’re nearby and don’t see your town listed, reach out — I probably cover your area too.
I’m Tom Duff, the owner and lead mold inspector here in York County. Before starting Mastertech, I spent nearly ten years in the Fire Department, where I learned a lot about how buildings are built — and what happens when things like water or humidity get inside where they shouldn’t.
After that, I worked for about six years in pest control and environmental cleaning. Those jobs gave me a good understanding of how moisture problems start and how they affect a home over time.
I eventually started Mastertech because I wanted to help people dealing with mold the right way. I grew up with mold-related illness myself, so I know how stressful it can be when your home starts affecting your health.
When I do an inspection, my goal is simple — to help you understand what’s going on in your property, what’s causing it, and what makes sense to do next.
A residential mold inspection in North York, PA typically costs $450, and includes visual inspection, moisture mapping, thermal imaging, and four mold samples (air or surface). Additional samples are $65 each, and lab turnaround is usually 1-2 business days.
For commercial properties, the cost of a commercial mold inspection is $650 and includes additional reporting and building coverage. Additional samples are $65 each, and lab turnaround is usually 1-2 business days.
Mastertech Environmental of York, PA. I'm your local expert in professional mold testing and inspection. With 17+ years of experience and trusted by thousands of homeowners, I can help you protect what matters most — your health and your home.