GET YOUR $100 REBATE ON EVERY NEW WINDOW*(Min. 4 windows)
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    Serving Lebanon, NH & Surrounding Grafton County

    Energy Efficient Windows & Siding in Lebanon, NH

    Upper Valley factory direct window replacement & insulated siding in Lebanon, NH.

    ZIP Codes: 03766•Factory Direct Pricing•Lifetime Material & Labor Warranty

    Premium Replacement Windows & Insulated Siding for Lebanon Homeowners

    Lebanon and the Upper Valley experience some of the coldest winter temperatures in New Hampshire. Keeping your heating oil or heat pump bill under control requires high performance triple-glazed window technology.

    CWS proudly services Lebanon homeowners near Dartmouth Health, downtown Lebanon, and West Lebanon. Cut your fuel costs by up to 50% with our factory-direct windows and insulated composite siding systems.

    Why Lebanon Residents Choose Custom Window Solutions

    65%-70% Lower vs National Brands
    Custom Manufactured Triple & Double Pane
    3/8" Fanfold Insulated Composite Siding
    No High Pressure Sales Representatives
    Senior Local Installation Crew
    Lifetime Material & Labor Warranty

    “We replaced 18 windows on a freezing December day in Lebanon. The crew was clean, fast, and professional. Furnace runs way less now!”

    — Local Lebanon, NH Client
    Factory Direct Savings

    Get Estimate in Lebanon

    Lock in your $100 rebate per window & free consultation.

    No pressure policy. We respect your privacy & never share your info.
    Energy Efficient Windows

    Custom Triple & Double Pane Windows in Lebanon

    Factory direct energy efficient windows save Lebanon homeowners 65%-70% versus national brands. Choose from triple pane or double pane glass, custom interior woodgrains, exterior polyurethane colors, and grid patterns including Colonial, Prairie, Craftsman, Diamond, and Simulated Divided Lites. Every installation is backed by a lifetime material & labor warranty and a $100 rebate per window (min. 4).

    • Triple & Double Pane High-Efficiency Glass
    • Low-E Coating for Year-Round Comfort
    • Custom Woodgrain & Color Finishes
    • Sliding Vinyl Patio Doors Available

    Window Options at a Glance

    Triple Pane Glass
    Double Pane Glass
    Low-E Coating
    Colonial Grids
    Prairie Grids
    Craftsman Grids
    Diamond Grids
    Simulated Divided Lites
    Casement Windows
    Double Hung Windows
    Bay & Bow Windows
    Sliding Patio Doors
    See all window options & colors →

    Siding Profiles at a Glance

    ASCEND Composite Plank
    Charter Oak D4.5 Clapboard
    D4.5 Dutch Lap
    Cedar Shakes & Scallops
    Board & Batten
    Hidden Vent Soffit
    Standard Colors (13)
    Architectural Colors (16)
    3/8" Fanfold Insulation
    TriBeam Reinforcement
    Heat-Reflective Pigments
    Lifetime Warranty
    See all siding profiles & colors →
    Insulated Composite & Vinyl Siding

    Premium Siding Installation in Lebanon

    Protect and beautify your Lebanon home with factory direct insulated composite and vinyl siding. Choose from ASCEND composite plank, Charter Oak D4.5 clapboard and Dutch Lap, cedar shakes, scallops, and modern Board & Batten — all paired with high-efficiency 3/8" fanfold insulation. The Charter Oak Hidden Vent Soffit system delivers superior attic airflow without visible holes or sagging, perfect for New England porches and overhangs.

    • 29 Standard & Architectural Colors
    • TriBeam Hurricane-Force Wind Rating
    • Hidden Vent Soffit — No Sagging
    • Lifetime Transferable Warranty