CertainTeed vinyl, insulated vinyl, James Hardie fiber cement, and LP SmartSide engineered wood, plus new soffit and fascia. This page covers Mount Airy, plus Walkersville and Thurmont: 12 ZIP codes in Frederick County.
These are the systems on the ExteriorMax siding page. Styles and colors are walked at the estimate, not picked from a city-specific catalog.
The workhorse for Maryland and Virginia seasons. Color that holds, seams that sit.
The same look, with foam-backed panels that quiet rooms and can cut the energy bill.
The painted-wood look without the yearly scrape.
Wood grain without the warp, with trim matched to the house.
Panels that buckle, crack, or pull loose after storms and summer heat.
Color that has washed out, or rubs off on your hand.
Soft trim, swollen boards, or moisture showing behind the wall.
Rooms along the outside wall that never hold their temperature.
ExteriorMax installs roofing, siding, windows, gutters, doors, and decks in Mount Airy, Maryland under MD 142964. Maryland, Virginia, West Virginia, and Pennsylvania are authorized service areas. The business address is 6301 Ivy Ln, Suite 120, Greenbelt, MD 20770.
The ZIP codes below are the zone list that names Mount Airy, along with Walkersville and Thurmont. They are not a city-limit map of Mount Airy alone.
Photos on this page are examples of ExteriorMax work and the products we install. They are not a job at a specific address.
Walkersville, Thurmont, Mount Airy. Frederick County. Zone MD-FRED-NORTH-EAST. ZIP codes: 21727, 21759, 21762, 21770, 21771, 21774, 21775, 21778, 21788, 21792, 21793, 21798.
From 2025-11-11 through 2026-11-11, National Weather Service severe reports for Frederick County include this headline: 58 mph winds recorded in Frederick County. That is a county record. It does not mean every home in these ZIP codes experienced that weather. Storms and summer heat are two reasons panels crack, warp, or pull loose. We check the wall in person. The county headline is not that check.
$0 down financing for qualified homeowners. Plans are walked at the inspection. A small deposit holds the schedule. Financing details.
Yes. This page covers Mount Airy, plus Walkersville and Thurmont: 12 ZIP codes in Frederick County under MD 142964.
Vinyl siding, Insulated vinyl, Fiber cement, Engineered wood. These are the systems on the ExteriorMax siding page. Styles and colors are walked at the estimate, not picked from a city-specific catalog.
Colors walked in person, Old siding off, wall checked, Hung and flashed, Soffit, fascia, and walkthrough.
Permit rules differ by county. ExteriorMax handles the permit and HOA packet for the job. We do not publish a separate permit fee for Mount Airy.
$0 down financing for qualified homeowners. Plans are walked at the inspection. A small deposit holds the schedule.
Also in Mount Airy: Roofing in Mount Airy · Windows in Mount Airy · Gutters in Mount Airy · Doors in Mount Airy · Decks in Mount Airy.
Company-wide siding page · Vinyl, insulated vinyl, fiber cement, and engineered wood · Mount Airy overview
Thurmont siding · Walkersville siding · Brunswick siding · Frederick siding · Middletown siding · Urbana siding
Mount Airy, plus Walkersville and Thurmont. ExteriorMax installs roofing, siding, windows, gutters, doors, and decks in Mount Airy, Maryland under MD 142964. Maryland, Virginia, West Virginia, and Pennsylvania are authorized service areas. The business address is 6301 Ivy Ln, Suite 120, Greenbelt, MD 20770.