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The 250 Sale · America turns 250 — you save $250 on 10+ windows

The Window Source of New Hampshire

Replacement Doors in New Hampshire & Massachusetts

4.8 · 51 Google & Facebook reviews · Family owned · Lifetime warranty

Therma-Tru Smooth-Star entry doors and Harvey & Gentek sliding patio doors — measured, custom-ordered, and installed by our own crew.

  • Front entry doors — Therma-Tru Smooth-Star fiberglass
  • Sliding patio doors — Harvey & Gentek vinyl gliders
  • Free in-home measure and a written quote
  • Backed by a Lifetime Warranty

Prefer to talk? (603) 764-7212

Free In-Home Door Quote

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    Therma-TruSmooth-Star entry doors
    Harvey& Gentek patio doors
    4.8★51 verified reviews
    Lifetimewarranty coverage
    Therma-Tru Smooth-Star Craftsman fiberglass entry door

    Front Entry Doors

    Therma-Tru Smooth-Star fiberglass — a smooth, paintable door that won’t warp, rot, dent or rust, hung in a PVC no-rot frame with an adjustable sill. Craftsman, Shaker and classic panel styles, with sidelites and transoms to fit your entry.

    Front Entry Doors »

    Harvey vinyl sliding patio door opening onto a deck

    Sliding Patio Doors

    Harvey and Gentek vinyl gliding doors with tempered safety glass and reinforced panels. Nearly every one we install goes out with the sturdier 5-inch rail and a foot lock — and a Transferable Lifetime Warranty.

    Sliding Patio Doors »

    Full-glass Smooth-Star entry door painted blue, seen from the kitchen

    Why Homeowners Replace a Door

    Security — a new fiberglass door in a sound frame is far harder to force than a worn door in a worn jamb. Energy — a draft at the door is money out the gap. Curb appeal — the front door is the first thing anyone sees. Function — doors that stick, drag, or won’t latch get worse, not better. Not sure which door fits? That’s what the free in-home estimate is for.

    “I was very happy with the installer, Leroy, he was professional, polite and cleaned up. … no mess at all. I need a new front door and will certainly call Window Source.”

    — Maggie P. · Google review

    Man pressing face against glass to stare at unbelievable window deal

    The 250 Sale

    Replacing Windows Too?

    Exceptional Value. American-Made. Lifetime Warranty.

    Bundle your new door with new windows — our best-selling Harvey Classic Double Hung runs $617 installed, and orders of 10+ windows save $250.

    Windows from $617 installed · $250 off 10+ windows.

    Get My Door Quote

    Financing available · Free in-home consultations

    Easy Financing Through Synchrony

    0% Financing for 18 Months*

    A house full of new windows for payments as low as $87/month* — invest now, and start saving on your utility bills this winter.

    Ask About Financing In Your Free Quote

    *Rates and terms dependent on qualifying credit.

    Skip Longacre, Owner of Window Source NH

    "To all of our customers; thank you. Our success relies on you and your experience. Your satisfaction has always been, and will always continue to be, our highest priority."

    - Skip Longacre
    Owner The Window Source NH, MA, & ME

    Flag Of The United States of America wiki commons

    Owner Skip Longacre, former US military, understands what it means to be of service to our nation. We proudly offer a 5% discount off of all goods and services to all military, first responders, police, fire department personnel, veterans, emergency medical technicians, as well as senior citizens.

    America turns 250 — you save $250 on 10+ windows

    Ready for a door that seals, locks, and looks right?

    Free in-home consultation — we measure, show you the options, and quote it in writing.

    Get My Door Quote (603) 764-7212

    Our Windows

    Double Hung Windows in New Hampshire, Massachusetts, & Maine Double Hung Windows » Siding Windows in New Hampshire, Massachusetts, & Maine Sliding Windows » Bow & Bay Windows in New Hampshire, Massachusetts, & Maine Bow & Bay Windows » Casement & Awning Windows in New Hampshire, Massachusetts, & Maine Casement & Awning » Basement Windows in New Hampshire, Massachusetts, & Maine Basement Windows » Garden Windows in New Hampshire, Massachusetts, & Maine Garden Windows » Colonial Grid Windows in New Hampshire, Massachusetts, & Maine Colonial Grid » Architetural Windows in New Hampshire, Massachusetts, & Maine Architectural Windows »

    Our Service Areas

    Here at Window Source NH we proudly service communities throughout New Hampshire, Massachusetts, and Maine. If you are looking for a window installation company to service your New England home, you found us! Some specific areas we serve are listed below.

    For a more complete list, please visit our service areas page. If you don't see your city on the list, don't worry! We work all over New Hampshire, Massachusetts, and Maine and would love to take your phone call.

    • Rockingham County, NH
    • Hillsborough County, NH
    • Merrimack County, NH
    • Strafford County, NH
    • Essex County, MA
    • York County, ME
    • Cumberland County, ME
    Get My Door Quote Call Now
    Double Hung Windows in New Hampshire, Massachusetts, and Southern Maine

    Double Hung Windows

    Series 3000 starting @ $587 installed. We offer the industry's highest quality and value replacement windows available. Whether you need one or three dozen, our professional crew will often offer same day installation.

    Double Hung Windows »

    Double Hung Windows in New Hampshire, Massachusetts, and Maine

    Sliding Patio Doors

    At The Window Source we offer replacement doors for your home. Whether you need front or a sliding patio doors for your home, then call the window and door installation professionals at The Window Source.

    Front Doors »
    Sliding Patio Doors »

    Professional Replacement Installation in New Hampshire, Massachusetts, and Maine

    5 Star Professional Installation

    Our customers consistently give us five star ratings because we are professional, care about your time & space, and ensure that your home gets the best product installation available in the industry.

    Contact Us Now »

    The 250 Sale — save $250 on 10+ windows · windows from $617 installed

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    What Our Customers Say

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