- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield has handled bed bug calls across Mt. Airy and the surrounding Carroll and Frederick County area since 2011, working under Maryland Department of Agriculture business license MDA #30263. Owner Troy Yowell, a certified pesticide applicator (MD #19058) with roughly 35 years in pest management — including years protecting U.S. military bases overseas from disease-carrying pests — leads every bed bug job personally. The team brings over 75 years of combined experience, and the company has earned Best of Frederick (2021) and Best of Nextdoor recognition four years running (2021–2024). Free inspections start every new bed bug case before any treatment is recommended.
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.
Most Mt. Airy homeowners discover bed bugs (Cimex lectularius) not by seeing the insects themselves, but by noticing the signs they leave behind. Bed bugs hide during the day in mattress seams, box spring folds, behind headboards, and in the cracks of nightstands and baseboards — then feed at night. By the time you suspect them, there’s usually physical evidence already present.
Bed bugs are not a sign of an unclean home. They travel on luggage, used furniture, clothing, and shared laundry, and they show up in every type of housing across Central Maryland — from new construction subdivisions to historic homes. Because they reproduce quickly and their eggs survive most single applications, professional treatment delivered as a defined cycle is what actually resolves the problem. A single over-the-counter spray rarely reaches the harborage points where eggs are laid, and surviving eggs hatch days later to restart the infestation.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
It was a horrible discovery when we realized we had brought bed bugs to our home from a hotel we had stayed in. I called Troy in an absolute panic and he was so kind, patient and helpful. He spent over an hour on the phone with me, educating me all about bed bugs and how to get rid of them. I called back twice more before he came to service our home because I was so upset and he truly helped ease my fears. When he came he was prompt, thorough, and professional. I also greatly appreciated how he scheduled a follow up to make sure the problem was taken care of. We were SO grateful with the new technology and spray Troy uses that was safe for our children and dog, left no smell, and completely eradicated the problem. Troy is honest, extremely kind, unbelievably knowledgeable, priced very fair, and more than capable of handling bug problems. We couldn’t recommend him more!
Alexandra Edwards · January 2023 Read on Google →
We hired Pest Shield despite the fact that their price was more than double some of the other companies I interviewed. The reason we did is because unlike the other companies, Pest Shield uses heat as a treatment. After doing my online research, I decided it was worth the extra money to do so. The first round of heat didn’t completely work – the next day, Troy from Pest Shield and I found live bed bugs in some of the blankets. Troy was true to his word, and reheated the upstairs for free and did additional treatments. It appears this second heat treatment was completely effective.
Marc Shiman · April 2014 Read on HomeAdvisor →
I had bed begs. Troy and his team got rid of them (so far). It has only been a few days but I was very impressed with the professionalism, honesty and expertise he provided to me. His pricing compared to his competitors was great as well! I was so impressed I referred him to my parents for termite treatment before he even did the treatment in my home. I would definitely recommend Troy and Pest Shield to others, and would hire Troy again in a second!
Alison Harris · November 2013 Read on HomeAdvisor →
General pest & rodent control
Every bed bug case Pest Shield handles begins with a free, no-cost inspection. Troy or a member of the team walks the affected rooms, identifies harborage points, confirms the species, and assesses how far the infestation has spread before recommending a treatment method. Troy is documented spending over an hour on the phone with homeowners before service is even scheduled, walking through bed bug biology and what eradication actually requires. That patient up-front education is the part most homeowners remember.
Pest Shield uses two treatment methods, selected based on the specific infestation:
Bed bug elimination is a defined cycle, not a single visit. Pest Shield’s protocol typically runs 2 to 3 visits spaced approximately 2 weeks apart. The spacing is biological — bed bug eggs that survive the first treatment hatch within roughly 6 to 10 days, and the follow-up visits catch newly emerged nymphs before they can reproduce. Each visit is documented, and a follow-up is scheduled to confirm the infestation is fully resolved.
If the initial treatment doesn’t fully resolve the issue, Pest Shield re-treats at no additional charge. The bio-pesticide option is specifically documented as safe for homes with children and pets, and Troy proactively discusses safety precautions before treatment begins — including which areas to avoid during the brief drying period and what to expect afterward. All products used are EPA-approved. Once bed bugs are eliminated, no ongoing service is needed for that pest; if you want year-round pest control in Mt. Airy unrelated to bed bugs, Pest Shield’s Standard Care Plan is available, but it’s never required as part of bed bug work.
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.
Mt. Airy sits along the Carroll–Frederick County line, with Pest Shield’s office on Lomar Drive serving the immediate area along with Woodbine, New Market, Damascus, Westminster, Sykesville, and the surrounding Route 27 and I-70 corridors. The town’s mix of newer subdivisions, historic homes along Main Street, and rural properties on wooded lots all see bed bug calls — the pest doesn’t discriminate by neighborhood or housing age.
Unlike termites or stinging insects, bed bugs aren’t tied to Maryland’s seasons or local geography — they travel on luggage, used furniture, and clothing, which means Mt. Airy homeowners face the same year-round risk whether they live downtown or off Watersville Road. What matters locally is having a Mt. Airy–based, owner-operated company that answers the phone directly rather than a national chain routing calls through a regional dispatcher.
Most bed bug cases Pest Shield handles resolve in 2 to 3 visits spaced approximately 2 weeks apart. The cycle is driven by biology — bed bug eggs that survive the first treatment hatch within 6 to 10 days, so the follow-up visit catches newly emerged insects before they can reproduce. Troy assesses the infestation during the free initial inspection and gives you a realistic visit count up front. If the first treatment doesn’t fully resolve the problem, re-treatment is at no additional charge.
Yes. Pest Shield uses EPA-approved methods, and the bio-pesticide spray option is specifically documented as safe for children and pets and leaves no residual odor. Heat treatment uses no chemicals at all. Troy discusses safety precautions before any treatment begins, including the brief drying period for treated areas and which rooms to avoid during that window. If you have a child with health concerns or a pet with sensitivities, mention it during the inspection — Troy adjusts the approach accordingly.
For bio-pesticide treatment, you typically don’t need to leave for long — usually just during application and the short drying period in treated rooms. Heat treatment requires more preparation and you’ll need to be out of the treated area while temperatures are elevated. Troy walks you through exactly what to expect and what to prepare before the first visit, including any items that need to be bagged, washed, or removed. There’s no guesswork — you’ll know what’s required before the appointment.
Almost always from travel or secondhand items — luggage from hotels, used furniture, clothing from shared laundry, or visits to places where bed bugs were already present. Bed bugs are not a sign of an unclean home, and Mt. Airy homeowners across every type of housing call Pest Shield with this problem. They’re small, flat, and excellent hitchhikers, which is why the most spotless homes still get them. Knowing the source isn’t required to treat the infestation, but it can help prevent a repeat.
Same-day or next-day in most cases. Pest Shield is based in Mt. Airy, so there’s no dispatch delay from a regional call center — you call (301) 829-0060 and speak directly with Troy, office staff, or a technician. The initial inspection is free, and Troy is documented spending substantial time on the phone walking bed bug customers through what to expect before the visit. If your situation is urgent, say so when you call.
