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⭐ 4.9 · 48 reviews · Serving Severn, Gambrills, Millersville, Odenton +13 areasENERGY STAR® · LOW-E GLASS · FREE ESTIMATE
Professional replacement window installation for Maryland homes — vinyl, composite, and bay/bow windows with ENERGY STAR® Low-E glass. Proper full-frame installation, weather-tight flashing, and a written workmanship warranty. 4.9★ · 48 Google reviews · Free estimate · 410-508-6141.
ENERGY STAR® · VINYL · COMPOSITE · BAY & BOW WINDOWS
We offer full-frame and pocket window installations in vinyl, composite, and fiberglass frames with ENERGY STAR® Low-E glass — engineered for Anne Arundel County's winters and humid summers. Every installation is sealed, flashed, and backed by our written workmanship warranty. Call 410-508-6141.
Replacing old single-pane or failed double-pane windows with ENERGY STAR® rated Low-E glass reduces heating and cooling costs, eliminates drafts, and boosts curb appeal. We assess each opening and recommend full-frame or pocket installation based on the condition of the surrounding framing — then flash and seal to prevent future water damage. 410-508-6141.
Our certified window installers perform full-frame or pocket installations based on a technical assessment of your home's opening condition. We integrate advanced flashing and sill pans, and seal every unit with a weather-tight foam and caulk system — ensuring no air infiltration, no water penetration, and maximum ENERGY STAR® rated performance. MHIC #05-146983 · 4.9★ · 48 Google reviews · Call 410-508-6141 for a free estimate.
We install vinyl double-hung, casement, sliding, bay/bow, and picture windows — primarily ENERGY STAR® certified with Low-E glass. All of our standard residential replacement windows are full-frame installations — not insert-only — for a proper weather seal and maximum glass size.
Most homeowners have all windows replaced in 1–2 days. A typical home with 15–20 windows usually completes in one day. We remove and dispose of all old windows, install the new units, and seal and trim each opening in a single visit.
ENERGY STAR® certified double-pane Low-E windows typically reduce heating and cooling energy use by 10–20% in Maryland homes. The exact savings depend on your existing windows, insulation, and HVAC system. BGE Home Energy rebates may also apply. We note the ENERGY STAR rating and U-factor for each window model we quote.
Full-frame replacement removes the entire existing window down to the rough framing — including the old frame, sill, and interior and exterior trim. This allows us to inspect and repair any rot or water damage before installing the new window. Insert or pocket replacement leaves the old frame in place, which can hide moisture damage and results in a slightly smaller glass area.
Yes. Our replacement windows include a lifetime warranty on the glass seal (against seal failure and fogging) and a manufacturer structural warranty of 20–30 years depending on the brand. Our 25-year workmanship warranty covers the installation — flashing, caulking, trim, and interior finishing. Both warranties are transferable to new homeowners.
A standard vinyl double-hung replacement window installed in Anne Arundel or Howard County typically runs $400–$700 per window including labor. Bay and bow windows or premium glass packages run higher. We provide free, written line-item estimates so you know the cost per window before any work begins. Call 410-508-6141 for a free home assessment.
Want proof? See what Maryland homeowners say about Apper Construction →