- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield has handled mouse problems for Mt. Airy homeowners since 2011, working out of our office at 4075 Lomar Drive. Our team carries over 75 years of combined pest management experience, including owner Troy Yowell’s 35 years in the industry. We’re licensed by the Maryland Department of Agriculture (MDA #30263) with Troy individually certified as a pesticide applicator (MD Cert #19058). Pest Shield has earned 338+ five-star reviews and was named Best of Nextdoor for four consecutive years (2021–2024).
How it works
Four steps. No surprises. Same answer whether it's your first call or your tenth.
You reach Troy or someone on his team directly. No call center, no dispatcher, no routing.
Same-day or next-day for most calls. Emergency stinging-insect situations and real-estate WDI deadlines get priority.
We identify the species, locate entry points, and find the source — not just the symptom.
Written recommendation, straightforward pricing, no obligation. If you don't need treatment, we'll tell you.
If you’ve spotted one mouse, there are almost certainly more. House mice (Mus musculus) are cryptic by nature — they stay hidden, move along walls at night, and rarely show themselves unless the population is already established. By the time you see one, droppings, or hear scratching in the walls, mice have likely been there for weeks.
Mt. Airy’s position on the edge of Carroll and Frederick counties — surrounded by farmland, hayfields, and wooded lots — creates steady rodent pressure, particularly in fall. As field temperatures drop and crops are harvested, mice push toward warm structures with accessible food. Older homes with stone foundations, crawl spaces, or aging siding give them more ways in.
Common signs homeowners notice first:
One-time treatment can knock down what’s currently inside the home, but it doesn’t address how the mice got in or the ongoing pressure from the surrounding landscape. That’s why mouse control in Mt. Airy works better as a combination of targeted treatment, entry point sealing, and ongoing pest protection in Mt. Airy — not a single visit and done.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
I called Pest Shield when my current pest company wanted us to pay 5-6 thousand for a supposed mice invasion in my attic. They wanted to rip out the insulation, treat for mice and install new insulation. Troy came out that day, inspected my attic and home and reported minimal evidence of mice, treated the attic and we have not seen a mouse in ages. Pest Shield treats your house primarily from the outside to prevent pests from ever getting into your house and keeps the chemicals out of your home, protecting your family. Pest Shield now protects our home regularly and I recommend them highly.
John Moore · June 2014 Read on HomeAdvisor →
Troy helped me understand that it is acceptable to have a few mice in the attic. My current pest control company (not Pest Shield) scared me into believing that I needed to remove all my newly installed insulation to decontaminate and remove any mice and their droppings, perform enzyme treatment, and then re-insulate the attic. The price quoted was > $3K. This is why I wanted a second opinion and with Troy I saved a lot of money when he checked my attic and told me that I don’t have the mice activity that requires such drastic measures. He was honest and told me what I truly needed.
Sudammi Ranasinghe · August 2013 Read on HomeAdvisor →
Troy was very knowledgeable, professional, courteous, and prompt. They eliminated my mice problem and came out for follow up visit to seal off any entry points from outside. Very reasonably priced for the service provided. Used top notch products, instead of just sitting out glue traps. Highly recommend them.
Kevin Smith · February 2016 Read on HomeAdvisor →
General pest & rodent control
Every mouse job at Pest Shield starts with a free inspection — not a treatment recommendation, not a service plan pitch. Troy or one of our technicians walks the property, identifies how mice are entering, and looks at the actual evidence inside the home. We’ve inspected attics in Mt. Airy where another company quoted thousands of dollars to rip out insulation, and found minimal evidence of mice. We tell homeowners what we actually see — even when the answer is “you don’t need what they told you you need.”
Our approach to mouse control follows a clear sequence:
Where mouse control becomes long-term protection is our Standard Care Plan — a 60-day bi-monthly treatment cycle focused on the exterior of the home. It’s a more frequent cadence than the industry-standard quarterly, calibrated to Maryland’s seasonal pest cycles. The plan carries a 100% effective guarantee: if mice or other covered pests reappear between scheduled visits, we come back and re-treat at no charge. You don’t need to be home for treatment, and most of the work happens outside, keeping chemicals out of your living space.
All of our products are EPA-approved, and we offer non-toxic options for homes with children, pets, or family members with sensitivities. Bait stations are placed inaccessibly to pets, and our technicians advise on any precautions to take around treated areas. Our exterior-first methodology — confirmed across years of customer reviews — keeps treatment outside the home wherever possible, so the inside of your house stays clear of pesticide application.
Owner
Founded Pest Shield in 2011 after years as a pest management contractor on U.S. military bases in Iraq and Afghanistan. Around 35 years in pest management. Personally handles or leads the majority of service calls.
Pest Management Specialist
Field technician handling residential and commercial service calls across Frederick, Carroll, and Montgomery counties.
Pest Management Specialist
Field technician handling residential and commercial service calls across the service area.
Our Entomologist
Consulting entomologist on species identification, conducive conditions, and treatment strategy for difficult cases.
Pest Shield is based in Mt. Airy at 4075 Lomar Drive — we’re not a regional chain dispatching from somewhere else. Mt. Airy sits along the Carroll–Frederick county line, where Interstate 70 cuts through farmland, hayfields, and wooded ridgelines. Older homes here often have stone foundations, crawl spaces, and aging siding, and the surrounding agricultural and forested terrain wraps the town on most sides.
That landscape is what drives mouse pressure in Mt. Airy. As fall temperatures drop and fields are harvested, mice push out of the surrounding terrain looking for warm structures with food. Older foundations and siding gaps give them more entry routes than newer construction, and mild winters can keep activity going year-round rather than shutting it down. Mice aren’t the only pest that benefits from this terrain — rat activity in Mt. Airy follows similar seasonal patterns and can occur alongside mouse pressure in the same structures.
It depends on what we find. For a single, isolated entry — a mouse that came in through a known gap that we can seal — one treatment is often enough, and Troy will tell you that directly. For homes near fields, woods, or with multiple entry points typical of older Mt. Airy construction, ongoing pressure from outside means mice will keep trying to get back in. That’s where our Standard Care Plan comes in: 60-day bi-monthly exterior treatment with a 100% effective guarantee and free retreatment between visits if anything reappears. We recommend it when it actually helps you and not when it doesn’t.
Yes, when placed correctly. We use EPA-approved professional-grade bait inside tamper-resistant stations placed where pets and children can’t access the contents — typically in attics, basements, or along exterior perimeter areas. Our exterior-first approach keeps most treatment outside the home entirely. For families with sensitivities or very young children, we have non-toxic options available, and Troy will walk through any precautions specific to your home before treatment begins.
After our initial treatment confirms the mouse activity is resolved — usually at the 30-day follow-up — we return to seal the entry points from outside. Mice can squeeze through gaps as small as a quarter-inch, so the sealing focuses on foundation cracks, utility line penetrations, siding gaps, soffit openings, and garage door seals. Sealing methods vary by the type and location of the entry point. It’s a separate follow-up step, not part of the initial treatment, and it’s the piece that keeps the problem from recurring.
Usually same day or next day. We’re based in Mt. Airy, so response times here are short. For active infestations or situations involving allergic family members, same-day scheduling is standard, and we’ve done Sunday calls at no extra charge. Call us at (301) 829-0060 and Troy will assess the situation over the phone and give you a real scheduling window.
Almost never, and we’ve documented this pattern repeatedly. We’ve inspected Mt. Airy-area attics where competitors quoted $3,000 to $5,000 for insulation removal, decontamination, and replacement — and found minimal evidence of mice that didn’t warrant any of it. A few mice in the attic is common, especially in fall, and is almost always solvable with targeted baiting, follow-up, and entry point sealing. Before you authorize that kind of expense, call us for a free second-opinion inspection at (301) 829-0060.
