Window Installation & Replacement in NJ, NY & NEPA

Energy-Efficient Window Installation

DEC Construction installs ENERGY STAR®-rated vinyl, fiberglass, and composite windows designed to reduce heat transfer and lower your monthly energy bills. Our expert team ensures each unit is correctly flashed and sealed to eliminate air infiltration and drafts.

We use advanced installation techniques—including foam insulation and multi-point locking systems—that maximize performance and comfort in any season. Proper installation prevents condensation, minimizes noise, and extends the lifespan of your windows.

Every window is custom-measured to fit your openings precisely, guaranteeing smooth operation and a perfect fit that enhances both aesthetics and efficiency.

Professional Window Replacement Services

Whether your existing windows are drafty, damaged, or outdated, our full-frame and pocket-style replacement options restore beauty and functionality. We remove old sashes and frames, inspect the rough opening for damage, and address any rot or water intrusion before installing your new windows.

Our installers then fit and secure the units, apply high-performance sealants, and install exterior trim to ensure a weather-tight seal. We clean up all debris and leave your home immaculate—and your new windows ready to perform.

From historic wood-look replacements to sleek modern frames, we match your home’s style and preserve its character.

Custom Configurations & Design Options

Choose from a wide range of styles—double-hung, casement, awning, bay, bow, and picture windows—all available in custom colors, grid patterns, and hardware finishes.

Our design consults help you select the perfect combination of style and performance for each room, whether you’re maximizing natural light in a kitchen or creating a cozy reading nook with a bay window.

We also offer specialty glass options—low-E coatings, tinted and obscure glass—to meet your privacy and UV-protection needs.

Comprehensive Warranty & Maintenance

All our window installations come with the manufacturer’s warranty plus DEC Construction’s one-year workmanship guarantee, covering parts and labor for complete peace of mind.

We provide seasonal tune-ups—lubricating hardware, re-sealing frames, and inspecting caulking—to maintain optimal performance and extend the life of your windows.

Should any issues arise, our responsive service team is just a call away, ensuring your investment remains protected long after the project wraps up.