- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. (MDA #30263) has delivered professional termite treatment across Frederick County since 2011, with Jeffrey Allwine — a credentialed entomologist — performing termite protection treatments directly. Troy Yowell, Pest Shield‘s owner, brings approximately 35 years of pest management experience to every inspection, including high-stakes work protecting U.S. military personnel overseas from disease-carrying insects. Pest Shield holds Maryland certified pesticide applicator credentials (MD Cert #19058) in all applicable categories and has earned 338+ five-star reviews across Google and HomeAdvisor.
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.
Subterranean termites — specifically Reticulitermes flavipes, the Eastern subterranean termite and the dominant species throughout Central Maryland — work from the soil upward, inside walls and structural members, long before a homeowner notices anything wrong. By the time visible signs appear, a colony has typically been active for months or years. In Emmitsburg, the combination of older housing stock, stone and masonry foundations, and Frederick County’s clay-heavy soils creates conditions where that timeline is compressed and the damage can be substantial.
What to look for:
Emmitsburg’s older farmhouses and historic structures present a particular challenge: stone and masonry foundations often have irregular mortar joints, settled footings, and direct soil-to-wood contact at sill plates — exactly the entry geometry that subterranean termites exploit. Frederick County’s clay-heavy soils retain moisture through dry periods, sustaining termite colony activity year-round rather than only during wet seasons. A single treatment applied to the wrong product or at insufficient depth leaves the colony intact and the structure at continued risk. Professional assessment before any treatment decision is not a formality — it is the difference between resolving the problem and masking it.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
Troy came out immediately to look at our house and did find termites, he was very professional, friendly and made us feel very comfortable; he explained everything to us; we had did some comparsion shopping with other companies and didn’t get the comfortable feeling with the other companies, Pest Shield was by far the best, I would recommend Pest Shield to anyone, they are a company that you can trust to have your best interest at heart. Troy was the best.
Linda Allen · July 2014 Read on HomeAdvisor →
Troy seems to genuinely like what he does and to educate his customers. He came to appointment ahead of time, explained things thoroughly, even taking me to crawl space under house to show where termites were entering house. Price was very competitive: price per linear foot was lower than other company and estimator from other company had included perimeter of a shed which, from my understanding, should not have been included because shed has no foundation, so not subject to invasion by termites. Work performed on time and as advertised. As indicated by others, a knowledgeable, competent and honest gentleman.
Otto Louis-Jacques · December 2015 Read on HomeAdvisor →
Troy is a true professional. He accommodated my schedule by coming after hours to do an inspection. I had gotten a “free inspection” from another BIG, WELL-KNOWN company and they had me believing I had live termites. I was suspicious when they didn’t show up for the initial treatment, and more so when I got conflicting information from people at their company. Turns out I didn’t have termites, and Troy was straight up, didn’t try to rip me off with a service I didn’t need. He SAVED me $1400 and I will surely use him in the future if I ever have a pest problem of any kind! Go Pest Shield!
Marion Entwisle · June 2014 Read on HomeAdvisor →
General pest & rodent control
Pest Shield’s termite treatment begins with a free property inspection — interior, exterior, crawl space, and any accessible attic or basement framing. Jeffrey Allwine, Pest Shield’s on-staff entomologist, performs termite protection treatments directly. This is not a general technician following a checklist; it is a credentialed specialist who can distinguish active infestation from old damage, identify the colony’s likely entry geometry, and determine the precise application scope the property requires. Troy Yowell documented taking homeowners directly into crawl spaces to show where termites were entering — that level of diagnostic transparency is standard here, not exceptional. Findings are explained in detail before any treatment recommendation is made, and pricing is quoted by linear foot of foundation perimeter so the cost is tied to the actual scope of work, not a flat package.
The treatment itself uses Termidor® HE — the professional-grade termiticide that is the documented industry standard for subterranean termite eradication. Two properties of Termidor HE make it effective where other products fail:
Termidor HE is applied as a continuous soil treatment around the foundation perimeter, into porch slabs and garage slabs where applicable, and with additional treatment at any areas of confirmed or suspected activity. The treatment is delivered under Pest Shield’s Termite Warranty Plan, which includes:
| Plan Feature | Detail |
|---|---|
| Application | One-time Termidor HE treatment |
| Colony eradication window | 90 days |
| Residual protection | 15+ years |
| Effectiveness guarantee | 100% |
| Warranty | Lifetime renewable |
After treatment, Pest Shield provides written documentation of what was found, what was applied, and what to expect over the 90-day eradication window. The lifetime renewable warranty means the property’s protection does not expire with a single treatment cycle — it can be maintained indefinitely. Pest Shield has documented experience treating historic homes with difficult crawl space access, including properties where standard equipment access requires adaptation; Emmitsburg’s older farmhouse stock is not unfamiliar territory. Termidor HE is EPA-registered and applied as a soil treatment around the foundation perimeter; once the treated soil has settled, there is no meaningful exposure pathway for occupants, children, or pets inside the home.
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.
Emmitsburg sits at the northern edge of Frederick County along US-15, roughly ten miles from the Pennsylvania border and adjacent to Catoctin Mountain Park. The town and surrounding rural areas are served by Pest Shield from its Mt. Airy base, with the same-day and next-day scheduling that Frederick County customers have documented across dozens of reviews. Nearby communities including Thurmont, Woodsboro, and the City of Frederick fall within the same service corridor.
The housing stock around Emmitsburg skews older — farmhouses and historic structures with stone or rubble-masonry foundations are common, and many sit on wooded lots where root systems and organic debris maintain the soil moisture that Eastern subterranean termites require. Frederick County’s clay-dominant soils retain that moisture through dry summers, sustaining colony activity year-round. Irregular mortar joints and settled sill plates on older foundations create direct soil-to-wood contact — the entry condition that our pest control in Emmitsburg is specifically designed to interrupt.
Yes — colony elimination is the mechanism, not just surface suppression. Termidor HE’s active ingredient (fipronil) is non-repellent, meaning Eastern subterranean termites cannot detect it in the soil and move through the treatment zone normally. When they do, they pick up the active ingredient on their bodies and carry it back to the colony, where it spreads through grooming and physical contact between nestmates. Because the transfer effect reaches workers, soldiers, and reproductives that never contact the treatment zone directly, the entire colony is eliminated — not just the foragers at the perimeter. Pest Shield’s Termite Warranty Plan is built on this mechanism: one-time Termidor HE application, 90-day colony eradication window, 100% effective guarantee.
The lifetime renewable warranty under Pest Shield’s Termite Warranty Plan means the protection established by a single Termidor HE application can be maintained indefinitely through renewal — the warranty does not expire after the initial treatment cycle. Termidor HE’s residual in the soil lasts 15+ years, so the warranty reflects the actual duration of the product’s protection rather than an arbitrary service interval. For specific renewal terms and what renewal involves for your property, Pest Shield will walk through that during the inspection and treatment consultation — it is part of the written documentation provided after treatment.
Treatment begins with the inspection findings already in hand — Jeffrey Allwine or Troy will have identified the foundation perimeter, any slab areas (porch, garage), and locations of confirmed or suspected activity. On treatment day, Termidor HE is applied as a continuous soil treatment around the foundation perimeter, injected or trenched into the soil at the appropriate depth to establish an unbroken treatment zone. Porch slabs and garage slabs receive treatment through drilled ports where applicable. Areas of concentrated activity receive additional treatment. Tapan Suthar’s review documents this protocol directly: perimeter application plus porch slab, garage, and high-activity areas. The work is exterior-focused; interior disruption is minimal. Pest Shield provides written documentation of what was applied and where before leaving.
Termidor HE is EPA-registered and applied as a soil treatment around the foundation perimeter — it is not sprayed into living spaces or onto surfaces where contact is likely. Once the treated soil has settled, there is no meaningful exposure pathway for occupants, children, or pets inside the home. Troy has documented proactively addressing safety concerns for homes with young children and immunocompromised family members, and Pest Shield uses EPA-approved methods throughout. For garden beds or plantings adjacent to the foundation, the application is targeted to the soil treatment zone; Pest Shield documented careful attention to a customer’s newly planted grass and garden during a termite treatment (Julia review). If you have specific concerns about proximity to vegetable gardens or water features, raise them during the inspection — the application scope can be discussed directly.
Yes. Pest Shield has documented experience treating historic homes with difficult crawl space access and non-standard foundation construction — Julia’s review specifically describes Troy working with a historic home where access required adaptation, with careful attention to the surrounding property. Stone and rubble-masonry foundations common in Emmitsburg’s older farmhouses present specific application geometry (irregular mortar joints, variable footing depth, limited crawl space clearance), and Pest Shield’s inspection process accounts for that before any treatment recommendation is made. The free inspection covers interior framing, crawl space, and exterior foundation — including documentation of access constraints — so the treatment plan reflects the actual structure rather than a standard template.
