Entry doors, sliding patio doors, hinged patio doors, and storm doors, fitted to the opening. This page covers Cobb Island, plus La Plata, Hughesville, and Indian Head: 19 ZIP codes in Charles County.
The slab, glass, and hardware are specced to the elevation at the estimate.
Composite slabs and glass options, with hardware and sidelights specced to the elevation.
Wide glass that stays out of the room, on a track that does not grind.
French and single-leaf doors, in-swing or out-swing.
The extra layer that lets you open the entry without inviting the weather in.
Light or air at the edges means the weatherstrip and frame no longer seal.
Doors that rub, stick, or need a shoulder to close.
Condensation between the panes of a door lite or sidelight.
Locks that do not line up, or latches that will not catch.
ExteriorMax installs roofing, siding, windows, gutters, doors, and decks in Cobb Island, 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 Cobb Island, along with La Plata, Hughesville, and Indian Head. They are not a city-limit map of Cobb Island alone.
Photos on this page are examples of ExteriorMax work and the products we install. They are not a job at a specific address.
La Plata, Hughesville, Indian Head, Cobb Island. Charles County. Zone MD-CHARLES-SOUTH. ZIP codes: 20610, 20611, 20612, 20617, 20625, 20632, 20637, 20640, 20645, 20646, 20658, 20661, 20662, 20664, 20675, 20677, 20682, 20693, 20695.
From 2025-11-11 through 2026-11-11, National Weather Service severe reports for Charles County include this headline: 1.25" hail recorded in Charles County. That is a county record. It does not mean every home in these ZIP codes experienced that weather. A county hail report is not a door inspection. Drafts, fogged glass, and locks that miss are.
$0 down financing for qualified homeowners. Plans are walked at the inspection. A small deposit holds the schedule. Financing details.
Yes. This page covers Cobb Island, plus La Plata, Hughesville, and Indian Head: 19 ZIP codes in Charles County under MD 142964.
Entry doors, Sliding patio, Hinged patio, Storm doors. The slab, glass, and hardware are specced to the elevation at the estimate.
Specced to the house, Old unit out, opening checked, Pan-flashed, foamed, and sealed, Adjusted and walked through.
Permit rules differ by county. ExteriorMax handles the permit and HOA packet for the job. We do not publish a separate permit fee for Cobb Island.
$0 down financing for qualified homeowners. Plans are walked at the inspection. A small deposit holds the schedule.
Also in Cobb Island: Roofing in Cobb Island · Siding in Cobb Island · Windows in Cobb Island · Gutters in Cobb Island · Decks in Cobb Island.
Company-wide doors page · Entry, patio, and storm doors · Cobb Island overview
Hughesville doors · Indian Head doors · La Plata doors · Bryans Road doors · Waldorf doors
Cobb Island, plus La Plata, Hughesville, and Indian Head. ExteriorMax installs roofing, siding, windows, gutters, doors, and decks in Cobb Island, 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.