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Frederick County Window Replacement Services


Commercial and residential properties have been calling the window installation specialists at WeatherMaster Window for over 20 years. We specialize in replacement windows and custom window services in Frederick County, offering a wide variety of window styles, including:

  • Architectural windows
  • Customized windows
  • Double hung windows
  • Horizontal sliders
  • Bay and box windows
  • Casement windows
  • Eyebrow windows
  • Half-round windows
  • Glass block windows
  • Three section slider windows
  • Hopper and awning windows
  • And more

In addition, the WeatherMaster Insulator Series are known as the most energy-efficient windows in Frederick County and beyond. Made from the highest quality components, our Insulator Series feature a fiberglass and polyfoam filled frame, galvanized steel or rigid fiberglass reinforcement, double-strength glass, the Insulator glass package and ENERGY STAR certification.

WeatherMaster also provides window framing services provided by our factory-trained professionals who will help pick out the best framing option for your needs:

  • Wooden window frames for classic renovations
  • Aluminum frames or aluminum reinforced vinyl frames for commercial properties
  • Low-maintenance, superior-insulated fiberglass and vinyl frames for the tightest of seals

All of our window replacement services and professional window installations are backed by our 110% lowest price guarantee. And with our transparent pricing policy guarantees, you can rest assured that you will only be charged for the work that was done.

Towns Served: Frederick, Ijamsville, Thurmont, Walkersville, Emmitsburg

Top Rated from Only $238 INSTALLED
Rated A+ by the BBB, Weathermaster offers highly energy-efficient, quality windows, at prices usually available only to builders and contractors.  Prices start as low as $238, including professional installation.  Don’t pay your utility company anymore than you have to– some of our models are 3X more energy saving than ENERGY STAR requirements!


No-Hassle Shopping
WeatherMaster’s unique, no-hassle shopping experience demands pricing that is simple and transparent, displayed right in our ads and online.  We know your time is valuable, so we’ll keep it simple– no long sales presentations, and no phony trade-ins or other gimmicks.


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Why Choose WeatherMaster?

Built For a Lifetime

whychoose_01cMost vinyl windows are hollow– not ours! All WeatherMaster models are built with either fiberglass or high strength alloy reinforcement. This provides solid support for our hardware, and helps prevent the bowing and warping that can reduce the window’s energy efficiency as it ages.

Extreme Energy Savings

R5_GlassCornerWeatherMaster windows are cutting edge products with the latest energy saving technologies. Built with argon & krypton gases, Heat Mirror films, Super Spacers, and multilayered low-e coatings some of our of our window perform over 290%** better than ENERGY STAR criteria!

A Simple, Hassle-Free Shopping Experience

Your time is valuable, so why spend it watching hours long sales presentations and haggling with home improvement salesmen? WeatherMaster pricing is simple and transparent, displayed right in our ads, online or quoted over the phone.

Three Decades of Trust

whychoose_04We’ve installed over 182,000 windows in Maryland, Washington DC and Virginia since we opened our doors in 1986. Our mechanics are window and door professionals. They do not install kitchens, baths or decks; they are not roofers… They install only windows and doors. Everyday. PERIOD. A window will only perform as well as it is installed and WeatherMaster customers get the best in the business!


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When you schedule a free onsite estimate with us, we will: 1. Bring actual working models to your home so you can see how they're built; and 2. Inspect your existing windows and answer all of your questions in 60 minutes or less.