Windows

Peak Windows & Doors, LLC 302-500-9511

Why Choose Replacement Windows?

Replacing old or inefficient windows is one of the most valuable home improvements you can make. Whether your goal is to lower energy bills, reduce maintenance, or refresh your home aesthetic, modern replacement windows deliver lasting results.

Aging windows often allow air leaks, condensation, and even water intrusion. Over time, this not only affects your comfort but can also lead to costly structural damage. New windows eliminate these issues through advanced sealing systems, insulated frames, and durable materials that resist weathering.

At Peak Windows & Doors, we don’t believe in a one-size-fits-all approach. We customize every replacement project based on your home’s architecture, climate, and lifestyle. From classic double-hung windows to contemporary casement, awning, and bow designs, we offer versatile solutions tailored to your home.

Partnering with Paradigm

Exclusive Aperture Series Windows

One of the biggest advantages of working with Peak Windows & Doors is our exclusive partnership with the Paradigm company, makers of the cutting-edge Aperture Series windows. These products represent the next generation of energy-efficient and structurally advanced window design.

As a Dealer of Excellence, we have been recognized by Paradigm for meeting stringent standards of craftsmanship, customer service, and technical knowledge. This status allows us to provide Delaware homeowners with access to a window collection that isn’t available anywhere else in the state.

Aperture Series windows are engineered with premium materials and innovative features, including:

•Foam-filled frames for superior insulation and reduced heat transfer.

•Interlock sealing systems enhance security while minimizing air infiltration.

•AnchorTite weather stripping, offering one of the lowest air leakage rates in the industry.

•Proprietary sill dam designs that improve drainage and protect against water intrusion.

•TrueSight balanced sashes that create a symmetrical, traditional look while maximizing natural light.

Every Aperture product undergoes AAMA Gold Label Certification, meaning it passes rigorous third-party testing for structural strength, air leakage, and water resistance. When installed by our certified technicians, these replacement windows deliver the performance and longevity your home deserves.

Professional Window Installation Services

The performance of your new windows depends as much on the quality of installation as on the product itself. Our windows installation process is detailed, precise, and designed to ensure long-term durability and efficiency.

At Peak Windows & Doors, we follow a meticulous approach that includes:

1. Initial Consultation and Measurement – We assess your current window conditions, discuss your energy and design goals, and take precise measurements.

2. Product Recommendation and Customization – Our experts help you select the right style, material, and glass package for your home.

3. Professional Installation – We prepare the opening, inspect framing, and install each window with factory-recommended flashing, insulation, and sealants to ensure a watertight and airtight fit.

4. Final Quality Inspection – Every project concludes with a full inspection to verify flawless operation, finish, and alignment.

This ensures that your new windows not only look perfect but also perform according to energy and security standards.

Benefits of Replacing Your Windows

Benefits of Replacing Your Windows

When you invest in replacement windows with Peak Windows & Doors, you’re doing more than upgrading a piece of your home — you’re improving how you live.

Enhanced Energy Efficiency

New windows help regulate indoor temperatures by reducing heat transfer. With double or triple glazing, argon gas fills, and Low-E coatings, your home remains warmer in winter and cooler in summer. This not only improves comfort but also reduces energy bills throughout the year.

Better Noise Reduction

Modern replacement windows are designed to minimize outside noise. Whether you live near traffic, schools, or busy neighborhoods, these windows provide a quieter, more peaceful indoor environment.

Improved Home Security

Aging locks and frames can compromise security. Our windows come with advanced multi-point locking systems and durable materials, ensuring your home remains safe from intrusions.

Increased Curb Appeal

Replacement windows can dramatically enhance the look of your home. From classic styles that preserve architectural integrity to modern, sleek designs that add sophistication, the right windows elevate exterior aesthetics instantly.

Low Maintenance

Thanks to durable finishes and materials such as vinyl, fiberglass, and composite, modern windows require minimal maintenance. You can enjoy beauty and performance without constant upkeep.

Added Home Value

Replacement windows are one of the best return-on-investment upgrades for homeowners. They not only improve comfort and energy performance but also add to your property’s resale value.

Replacement Window Caulking - finishing touches.

Custom Window Styles to Match Every Home

We offer a wide range of new windows designed to complement any architectural style. Some of our most popular styles include:

• Double-Hung Windows – Versatile and easy to clean, with sashes that tilt for ventilation and maintenance.

• Casement Windows – Hinged on the side, offering wide, unobstructed views and excellent airflow.

• Awning Windows – Perfect for adding ventilation even during rain, as they open outward from the top.

• Bow and Bay Windows – Add depth and character to your home’s façade while increasing natural light inside.

• Sliding Windows – Ideal for modern spaces; these windows offer smooth operation and panoramic views.

Each style is customizable in frame color, finish, and glass package, ensuring your replacement windows perfectly align with your home’s personality and your preferences.

Why Delaware Homeowners Trust Peak Windows & Doors

The Importance of Choosing the Right Installer

Our reputation as one of Delaware’s most trusted window specialists comes from years of dedicated service, top-tier craftsmanship, and partnerships with leading manufacturers like Paradigm. We handle every stage of your project in-house, from consultation to installation and aftercare.

We’re more than installers — we’re problem solvers. We understand Delaware’s unique climate and building codes, allowing us to recommend the best solutions for long-term performance. Whether you need to replace aging wooden windows in a historic property or install energy-efficient vinyl models in a new build, we ensure precision at every step.

Our goal is to give every homeowner a smooth, transparent, and satisfying experience — and that commitment is why Paradigm recognized us as a Dealer of Excellence.

Even the most advanced replacement windows won’t perform well if they’re not installed correctly. Poor installation can lead to drafts, leaks, and reduced energy performance.

Choosing Peak Windows & Doors means choosing a team that’s not only experienced but also certified and backed by a nationally recognized manufacturer. Our installations meet AAMA and ENERGY STAR performance requirements, and we always ensure every window is properly flashed, sealed, and insulated.