The Infinity Fiberglass Window Advantage

The benchmark for customer service and satisfaction

Our experienced technicians install windows of all shapes and sizes, including hard-to-fit and unusual models. Our installers will arrive at your home equipped with all of the tools and materials they need to guarantee perfect fit and function. Our Homespire’s Signature Warranty1 covers the installation of your windows for as long as you own your home.

Home window replacement warranty and peace of mind

Ultrex® fiberglass delivers lasting performance

  • Expands 87% less than vinyl – resists expanding and contracting in any climate

  • 8 time stronger than vinyl – protects the integrity of your home

  • Resistant to leaks, seal failures and stress cracks – all things that can affect energy efficiency

  • An average 68-72% return on investment – ranks higher than most interior renovations

Bathroom window replacement

Acclaimed design that withstands the test of time

  • We offer a complete collection of styles, features and options to complement any home

  • All products feature narrow profiles for expanded views and more daylight

  • Fiberglass has a longer useful life expectancy than vinyl

  • Our proprietary acrylic finish is fade-resistant and virtually maintenance-free

Double Hung windows

Double and Single Hung

The double-hung window style is essentially two windows that sit above and below one another. A window can be unlocked and pushed upward or downward behind the second providing plenty of natural light and calls for easy maintenance and cleaning. When opened from the top, double-hung windows can let warmer air escape. Additionally, these windows let you control how much outside air you allow into your home by positioning each piece exactly how you want them.A window classic updated for modern performance

If you struggle to lift open your single or double hung fiberglass windows or have to use a dictionary to keep them propped open, you’ll be amazed at the smooth operation of the Infinity Double and Single Hung. The strength and stability of Ultrex® fiberglass frame means your new windows will open and close effortlessly for years to come.

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Sliding windows let homeowners open both ends of a lite piece as they slide freely along a track. Choosing a two-lite or three-lite sliding window design gives our customers control of the view they want of their yard or surrounding property. Going with a sliding window provides a larger window space when compared to other styles. Air movement in your home is a key benefit from sliding fiberglass windows because you can slide an entire side open. Opening, closing and locking this style is easy as it does not operate by a crank or push outward. Sliding windows come in sizes large and small, are easy to clean and fit almost any wall.

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Casement windows


Casement windows are a beautiful addition to any home. Opening outward like a door on a hinge, these fiberglass windows provide incredible views and function by a crank system. Casement windows provide great flexibility for any homeowner. This window style is ideal for kitchens and dining rooms as they give the homeowner a line of visibility. Controlling airflow becomes easier than ever because our design enables you to open windows as far as you like. Casement windows feature locking technology and are easy to clean.

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Awning window


Awning windows open similarly to an awning made of fabric in that the base of the frame slides out and the top stays attached by a hinge. This window design allows for optimum airflow as heat or steam can escape from kitchens and bathrooms. Awning windows are popular among homeowners looking to add some natural light but in a secure and private manner. This style keeps a steady air flow throughout your home and operates by a crank system. This protects homes from unexpected weather and storms that can pass through at any time. If your home has an unfinished basement, fiberglass awning windows provide excellent airflow to damp conditions.

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Bay windows


Bay windows use three or more windows to create one piece for installation and allow excess natural light and extend out from house walls. Choosing this style of window is ideal for establishing a sense of openness in any home and calls for a number of options based on your preference. These fiberglass windows are a great option for homeowners trying to gain a little more space in rooms. A bay window unit also opens up the view to your yard and surroundings.

Additional light and space provided by Infinity Bay

The Infinity Bay is built to capture light from three angles and can vary in size from big sunlit areas to a small cozy reading nook. Built with Ultrex® fiberglass, our bays are available in double hung and casement configurations.

  • Customize the Infinity Bay for your home by selecting Infinity Double Hung or Casement window configuration
  • Choose from a picture or operating center unit for total ventilation
  • Standard pine or optional oak head and seat boards that are insulated for extra comfort
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Bow window


Bow windows use four or more fiberglass windows in a single unit to open up a room with natural light. They typically protrude from a house wall if you were to stand next to it outside. Homeowners gravitate to this window style as it provides more space and a platform for home decor. On a larger scale, a bow window gives a home and room a more rounded appearance, add panoramic views, and are a focal point of any home.

Additional light and space provided by Infinity Bow

The Infinity Bow is built with a gentle curve to capture light from multiple angles and completely open up a room. They are designed with Ultrex® fiberglass and available with four, five or six-wide assemblies of casement windows. Choose between standard pine or optional oak head and seat boards that are insulated for extra comfort.

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Special Shapes window

Special Shape & Picture

Achieve open views and abundant natural light

Infinity Special Shape & Picture Windows give you total design flexibility; from stand-alone picture windows that span up to an impressively large 10 feet as for sweeping views, to multiple geometric combinations that add architectural interest to your home. Every Infinity Special Shape and Picture Window is made with Ultrex® fiberglass for timeless design and performance, so you can enjoy your windows for years to come.

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Roundtop windows

Round Tops

A strong improvement to your view

Adding an Infinity Round Top above a standard window or door instantly adds light and style to your home. Whether you are looking to add visual interest to a room or are simply replacing an old window, Infinity Round Tops are a stunning addition to any space. Over 20 Round Top shapes are available, so you can find the perfect choice for your home.

All Areas We Serve

We provide quality replacement fiberglass windows throughout Central Pennsylvania and Philadelphia. That means you can count on us for quality window installation, custom design and security options as well as friendly customer service no matter where you’re located in Pennsylvania. Our trained representatives can visit your home today to provide a free window analysis to gauge your needs and expectations.

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front door porch area on residential home

Real Customers, Real Reviews

What Pennsylvania Homeowners Love About Us

“These guys are the best people ever. I had never had these experiences with installers. I will definitely recommend your company to all friends & family members. “

Reading, PA

“It was a pleasure having the crew in my home. They were so clean with their work; you would not have known they were working and working diligently. They were superb.”

Harrisburg, PA

“We were very pleased with our Homespire experience! The sales rep and installation crew were fantastic! Very pleased with our windows and our beautiful basement door.”

Boiling Springs, PA

“Our experience with Homespire from start to finish was excellent. Our Sales Rep, Winston, was friendly and knowledgeable. He didn’t pressure us into any decision. Our installation went so smoothly. Andrew and his crew cleaned up so well, you wouldn’t have even known they were there. We also liked working with a local company. “

Lancaster, PA

“The workers were very professional. They worked very well together. They were very knowledgeable about the job that they were doing. Something didn’t look right they made it right. We love the work they have done for us. We would not have any hesitation to recommend them to anyone.”

Shermans Dale, PA