Replacement windows affect the look of your home. They also have a major impact on energy usage and comfort. When you’re considering replacement windows, consider the materials, shape, and functionality. You want to make sure each window makes your home inviting, increases efficiency, and keeps it secure. Take a closer look at our vinyl replacement window options!

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old wooden window in kitchen in need of replacement replacement window in kitchen

Signature Series

Replace your windows ONE time with Signature’s durable, long lasting windows. Your choice in new replacement windows not only affects the architectural look of your home but has a major impact on your energy usage and comfort.

You don’t need to sacrifice strength at these critical barriers to your home. Zephyr Thomas offers the most technologically advanced materials for maximized strength against harsh weather, intrusion, and health hazards.

If you are looking for vinyl replacement windows in Lancaster, you should know that all of our windows are Energy Star® and National Fenestration Rating Council (NFRC) certified. Zephyr Thomas also carries the finest fiberglass entry doors Lancaster PA has to offer, so check out our door selection as well!

Why should I consider Signature windows?

Simply put, Signature will work hard for you and perform beyond your expectations. So when searching for replacement windows in Lancaster, PA, you will find it is the most sensible window solution for your Lancaster area home.

You may be looking for a window equipped with advanced engineering that offers exceptional energy performance, safety and security, virtually maintenance-free enjoyment, ease of operation, or elegant refinement. Signature incorporates ALL of these important elements into one window.

Zephyr Thomas is your authorized Lancaster windows dealer for Signature. Signature is the superior window choice for your family, home, lifestyle, and budget.

Window Performance Evaluation

  • Step 1
  • Step 2
  • Step 3

STEP 1: Examine the thermal performance of the ENTIRE window

Signature Windows

U Factor: Thermal Insulation The U Factor indicates how easily heat will flow through the window, whereas R Factor indicates the opposite, how well the window will resist heat flow. The lower the U Factor, the better a window insulates.

Solar Heat Gain Coefficient (SHGC): The amount of solar radiation admitted through a window. The lower a window’s SHGC, the less solar heat is transmitted into the house and the easier it is to keep your house cool in summer. On the other hand, in northern climates, a higher SHGC can provide beneficial passive solar heating in the winter. Signature offers a variety of high performance Low E glass packages with varying SHGC ratings to suit your needs, based on your climate.

Visible Transmittance (VT): Measures the percentage of visible light that is admitted through the window. High performance glass packages have been designed to enhance a window’s thermal performance by blocking ultraviolet and infrared light, while maximizing visible light transmission. Clear glass itself blocks about 20% of visible light.


STEP 2: Check the structural performance of the ENTIRE window

Air Infiltration
Signature Windows
Signature windows are tested to standards set forth by the American Architectural Manufacturer’s Association (AAMA) for structural performance. Air infiltration, water penetration, and structural wind loads are three commonly referenced tests.

What Is Air Infiltration? The amount of air that passes through the seals of a window’s operating sashes per minute, per square foot of window. Using a typical vinyl window would be like having a hole in the wall of your home, leaking 9.68 balloons worth of air per minute!

Signature windows are over 10 times more air tight than typical vinyl windows.

STEP 3: Verify the thermal performance of the glass

Healthy Smart Windows

Super Spacer® Signature Windows:
Use advanced Super Spacer® as a standard to create insulated glass with a warm edge around the perimeter. The edge of the glass is typically the coldest spot on the window and can be prone to condensation. Other windows utilize glass panes with rectangular aluminum that conducts the heat away from the inner pane of glass, resulting in a cold edge. Super Spacer is a non-metallic, structural foam spacer. Super Spacer® blocks heat escape, dramatically reduces condensation, and offsets the effects of temperature changes that prevent stress cracks. This “Health Smart® Spacer” significantly reduces the opportunity for mold and mildew to form on the window.

Healthy Smart Windows Microshield: Signature’s MicroShield triple antimicrobial weather– stripping maintains a weather tight fit between the sashes and frame. It keeps mold and mildew at bay, and is especially helpful for people with allergies and asthma. This completes the package for a truly “Health Smart®” window.

Signature’s Custom Design

Choose the glass, grid, and color options that are perfect for you and your home…the possibilities are nearly endless. The flexibility of our window designs and the ability to integrate any design and size into your home allows for optimum cost effectiveness and energy efficiency when needing windows in Lancaster. The choice is truly yours– style, size, color, and an assortment of specialty window shapes, grid styles, and glass options will provide a look designed exclusively for your home.

Insulated Glass Packages:

Window Glass Options

Colors & Coatings:

Window Color Options

Window Styles:

Window Style OptionsDownload the Signature brochure for more information and features. We have other window series and options available, so visit our showroom or call for more information.

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