Infinity by Marvin – NJ, PA & DE Fiberglass Window Replacement
Exteriors by Global Home is the Area’s No. 1 Installer of Infinity Fiberglass Windows from Marvin
Exteriors by Global Home is the area’s No. 1 installer of Marvin’s Infinity Fiberglass Windows, serving NJ, PA & DE. Call us at 215-953-5151 or 888-234-2929.
Upgrade to Infinity fiberglass windows for lasting durability, excellent energy performance, slim frame profiles, and the design support of a local installer that backs the work in writing.
Infinity Diamond Partner
Presidents’ Circle Installer
Platinum Plus Workmanship Warranty
Local NJ & PA Offices
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Infinity Diamond Partner
Marvin’s highest installer designation – earned through verified performance
Presidents' Circle Installer
Nationally recognized among Marvin’s highest-performing installation partners
Platinum Plus Workmanship Warranty
Installation quality guaranteed in writing – every project, every window
Local NJ & PA Offices
Springfield, NJ and Feasterville-Trevose, PA – no out-of-state crews
The Region's No. 1 Infinity Fiberglass Installer
Not Every Infinity Window Contractor Is an Infinity Diamond Partner
Infinity by Marvin fiberglass windows are available through multiple contractors in NJ and PA. What separates them is the installation. A misinstalled Infinity window — improperly shimmed, incorrectly flashed, or sealed with the wrong materials — performs no better than a budget vinyl unit and may void your manufacturer warranty entirely.
Exteriors by Global Home holds both the Infinity Diamond Partner designation and Presidents' Circle recognition — Marvin's two highest installer awards. These are not self-assigned marketing claims. Diamond Partner status is awarded by Marvin based on verified installation volume, documented technical training, and customer satisfaction data. It gives our team direct access to Marvin's technical support for any post-installation product issue.
Presidents' Circle recognition places Global Home among the top-performing Infinity installers in the country. For a premium fiberglass window investment, the installer behind the product matters as much as the product itself.
Factory-Trained, W-2 Employed Crews
Every Infinity fiberglass window is installed by our own trained, background-checked employees – never subcontracted. You know who is arriving before they do.
Custom-Manufactured to Your Openings
We measure every window opening to the fraction of an inch. Your Infinity windows are ordered custom – not cut from stock – ensuring the precision fit that fiberglass demands and your warranty requires.
Double Warranty - Product + Workmanship
Infinity by Marvin’s manufacturer lifetime warranty on frames and glass, backed by our Platinum Plus Workmanship Warranty. Both documented in writing before any work begins.
Price-Match Guarantee + 2-Year Financing
Bring a qualifying competitor quote and we will match it. Or spread the investment over 2 years with no interest and no payments – making premium fiberglass accessible on any timeline.
Know Your Product
Infinity by Marvin Fiberglass - Colors, Hardware & Glass Options
Most competitors describe fiberglass windows generically. Here are the specific options available through the Infinity by Marvin lineup — the product details buyers actually research before making a decision.
Exterior Color Options (6 Standard)
Stone White
Pebble Gray
Sandstone
Sierra
Bahama Brown
Black
All exterior colors feature Infinity's proprietary acrylic finish — 3× thicker than competitors — which resists fading, chipping, and chalking over decades without repainting.
Interior Finish Options
Stone White Interior
Canvas Interior
EverWood Stainable
Hardware Finishes (8 Options)
Oil-Rubbed Bronze
Bright Brass
Satin Nickel
Bright Chrome
Antique Brass
Brushed Chrome
White
Tan
Glass Package Options
Standard Double-Pane
Double-pane with Low-E coating and argon gas fill. Meets ENERGY STAR Northern Climate Zone requirements. The baseline for all Infinity fiberglass installations.
High-Efficiency Low-E
Enhanced Low-E coating with argon or krypton fill, achieving U-factors of 0.17–0.19. Optimal for NJ/PA's Northern Climate Zone — maximum winter heat retention and summer solar control.
Decorative Glass Options
Rain, Frost, and other textured glass options available for bathrooms, entryways, and privacy areas. Unique to Infinity — not available on comparable vinyl or Fibrex® lines.
Grille & Divided Lite Patterns
Simulated divided lites, colonial grilles, and custom pattern options available to match historic home aesthetics. Grilles are between-the-glass or applied exterior/interior based on style.
All options are reviewed during your in-home consultation. Our consultant will bring color samples, hardware finishes, and glass samples to your home so you can compare against your existing trim, flooring, and fixtures before ordering. Schedule your free consultation →
A Benefit Most Homeowners Miss
Fiberglass Is Stronger, So the Frames Are Slimmer - Which Means More Glass
Because Ultrex fiberglass is significantly stronger per square inch than vinyl, Infinity windows can be engineered with substantially narrower frame profiles. A slimmer frame isn't just aesthetic — it directly increases the glass area in every opening.
- More daylight per opening without enlarging the rough opening — a benefit visible immediately after installation, particularly in living rooms and dining spaces.
- Unobstructed views — thinner sightlines between panes and at corners mean the window disappears into the view rather than framing it.
- Higher glass-to-frame ratio compared to vinyl windows of identical outer dimensions — more of your opening is transparent glass, less is opaque frame.
- No structural compromise — the slimmer profile carries the same load capacity and seal performance as a thicker vinyl frame due to fiberglass's superior tensile strength.
8x
stronger than vinyl per square inch – enabling significantly slimmer frame profiles
>=10%
more glass area in the same opening vs. vinyl windows of identical outer dimensions
87%
less thermal expansion than vinyl – frames stay perfectly aligned with glass year-round
3x
stronger than Andersen’s Fibrex composite – the closest competing fiberglass-adjacent material
Comparing Fiberglass Options
Ultrex® (Infinity by Marvin) vs. Fibrex® (Andersen) — The Fiberglass You're Actually Comparing
When NJ and PA homeowners research fiberglass windows, two names surface most: Infinity by Marvin's Ultrex and Andersen's Fibrex. They are not the same material. Here's an honest breakdown of how they differ.
| Feature | Ultrex Fiberglass Infinity by Marvin | Fibrex Composite Andersen Windows |
|---|---|---|
| Material Composition | 100% pultruded fiberglass | Vinyl + wood fiber composite blend |
| Strength vs. Vinyl | 8x stronger than vinyl | ~2x stronger than vinyl |
| Ultrex vs Fibrex Strength | 3x stronger than Fibrex | Baseline |
| Thermal Expansion | 87% less than vinyl | Better than vinyl, worse than Ultrex |
| Paintable After Installation | Yes – full repaint capability | No – Fibrex cannot be repainted |
| Decorative Glass Options | Yes – Rain, Frost, custom patterns | Limited |
| Hardware Finish Options | 8 hardware finishes | 5 hardware finishes |
| NFRC Certified U-Factor | 0.17-0.22 | 0.20-0.30 (varies by series) |
| Typical Lifespan | 30-50 years | 20-40 years |
Fibrex is a registered trademark of Andersen Corporation. Comparison reflects published manufacturer specifications and industry testing. Specific model performance may vary.
Optional Interior Finish
EverWood® — The Wood Look. None of the Work.
Stainable Oak Grain
Fully Paintable
Scratch Resistant
No Sanding. Ever.
No Rot. No Swelling.
Matches Existing Trim
EverWood is Marvin's proprietary stainable woodgrain finish applied over the Ultrex fiberglass frame. Indistinguishable from real wood at arm's length. No ongoing maintenance whatsoever.
Best of Both Materials
Want the Warmth of Wood? You Don't Have to Sacrifice Performance to Get It.
Many NJ and PA homeowners hesitate on fiberglass because they love the visual warmth of a wood window interior. EverWood resolves that tension entirely without compromise.
Available on select Infinity by Marvin fiberglass windows, EverWood is a stainable woodgrain interior surface applied directly over the Ultrex frame. It replicates the visual character of natural wood — and unlike Andersen's Fibrex, it can be stained or painted at any time to match updated interior finishes without any special products or professional refinishing.
- Ideal for colonial, craftsman, and Victorian homes where painted white interiors feel wrong and full wood windows create maintenance headaches.
- Retains full Ultrex exterior performance — the outside remains fiberglass, resisting moisture, swelling, and rot while the inside delivers wood aesthetics.
- Eliminates the main argument for wood windows — you get authentic interior aesthetics without sanding, painting, or moisture damage over the window's 30–50 year lifespan.
- Available in two pre-finished interior options (Stone White or Canvas) or the stainable EverWood surface — choose during your in-home consultation with physical samples.
Every Style, Every Opening
Infinity Fiberglass Available in Every Window Style - Each With a Reason
Fiberglass strength means slimmer profiles and more glass in every style. Below is why fiberglass specifically excels in each window type — not just what the style is.
Double-Hung
Both sashes open for ventilation and tilt in for easy interior cleaning. The most common style for NJ & PA homes.
Fiberglass advantage: tighter sash compression seals that vinyl's sag cannot maintain long-term
Casement
Hinged on the side, opens outward via crank – creates a compression seal unmatched by double-hung efficiency.
Fiberglass advantage: slim fiberglass rail allows larger glass area in casement configurations vs. vinyl
Picture / Fixed
Non-opening fixed glass for maximum uninterrupted views — ideal for living rooms, great rooms, and water-facing exposures.
Fiberglass advantage: slimmer corner profiles create near-frameless views that vinyl cannot achieve structurally
Awning
Hinged at the top, opens outward — allows ventilation even during rain. Ideal for kitchens, bathrooms, and basements.
Fiberglass advantage: dimensional stability means the awning hinge maintains perfect alignment season after season
Sliding / Gliding
Sashes glide horizontally — excellent for wide openings where vertical space is limited, such as egress windows.
Fiberglass advantage: frame rigidity eliminates the sash binding that vinyl's thermal expansion causes in NJ summers
Bay & Bow
Multi-angle projecting windows that create interior floor space, flood rooms with light, and transform curb appeal dramatically.
Fiberglass advantage: superior structural strength supports larger bay spans without the sag risk of vinyl units
Round Top / Arch
Custom specialty shapes — arched, elliptical, hexagonal, triangular. Common in Bucks County and Morris County historic homes.
Fiberglass advantage: precision pultruded material holds curved shapes without distortion over decades
Single-Hung
Lower sash opens while upper remains fixed. A practical, cost-efficient choice for secondary rooms and upper floors.
Fiberglass advantage: same Ultrex performance at a slightly lower investment than double-hung configurations
Not sure which style fits each opening? Our consultant assesses every window during the free in-home visit and recommends styles based on ventilation needs, architecture, and your preferences.
What to Expect to Invest
Fiberglass Window Costs in NJ & PA - Honest Numbers
Fiberglass windows cost more upfront than vinyl — and the reason is straightforward: Ultrex fiberglass is a fundamentally superior material. It is stronger, more dimensionally stable, longer-lasting, and virtually maintenance-free over a 30–50 year lifespan. For NJ and PA homeowners planning to stay in their home for a decade or more, fiberglass is consistently the more cost-effective choice when evaluated over the window's full working life.
Here are realistic installed cost ranges for Infinity by Marvin fiberglass windows in NJ and PA in 2025–2026, based on current market conditions across our service areas.
$900-$1,600
Standard Double-Hung or Casement
Installed, per window – Infinity by Marvin fiberglass
$1,600-$2,500+
Premium Styles - Bay, Bow, Arch, Large Picture
Installed, per window or unit
$12,000-$26,000
Whole-Home Fiberglass Replacement (10-15 windows)
Full project, installed
What Moves Your Final Number
Insert vs. Full-Frame Replacement
Insert replacement into existing sound frames is the lower-cost option. Full-frame removal is required for rotted frames, size changes, or style changes — adds labor and material cost, but is the right choice when frames are compromised.
Glass Package
Standard Low-E with argon is the baseline. Krypton fill, triple-pane, or decorative glass options increase per-unit cost meaningfully — glass package is typically the second-largest cost driver after frame material.
EverWood® Interior Finish
Upgrading to EverWood adds modest cost per unit but eliminates any interior wood window maintenance for the life of the window — a worthwhile trade for homes with extensive interior woodwork.
Project Volume
Replacing all windows in a single project is more cost-efficient per unit than phased replacements. Our price-match guarantee applies to all qualifying project sizes — bring a competitor's written quote.
Style & Size
Bay, bow, and specialty arch windows require more glass, more material, and more installation time — all itemized clearly in your written quote before ordering begins.
The Right Product Deserves the Right Installer
Six Reasons NJ & PA Homeowners Choose Global Home for Infinity Fiberglass
Infinity by Marvin windows are sold by multiple contractors in our region. What determines the outcome of your investment is the quality and accountability of the installation.
Diamond Partner + Presidents' Circle — Both
Very few installers in NJ or PA hold the Infinity Diamond Partner designation alongside Presidents' Circle recognition simultaneously. These are awarded by Marvin on verified installation performance — not sales agreements. Diamond status gives us direct access to Marvin's technical support for any post-installation product concern.
No Subcontractors — Our Crews Only
Every fiberglass window is installed by our own factory-trained, W-2 employed crews — never handed off to a subcontractor. You will know who is coming to your home before they arrive. Fiberglass requires precise shimming and sealing technique; we do not risk your investment on a subcontractor's judgment.
Dual Warranty Coverage — Product + Workmanship
Infinity's manufacturer lifetime warranty on frames and glass, backed by our Platinum Plus Workmanship Warranty on installation quality. Both are documented in writing before work begins. If anything fails — product or installation — you have a clear written path to resolution without a runaround.
Custom Orders Only — No Stock Inventory
Your Infinity windows are custom-manufactured to the exact dimensions of each opening. We measure every opening to the fraction of an inch before anything is ordered. This is how we ensure the airtight fit that fiberglass demands — and how your manufacturer warranty stays valid from day one through the window's full lifespan.
Price-Match Guarantee + Flexible Financing
Present a qualifying competitor's written quote for a comparable Infinity fiberglass project — we will match it. We also offer 2-year no-interest, no-payment financing on all projects, making the premium material accessible without forcing a budget compromise. See our financing options for full terms.
Local Offices — NJ & PA Community
With offices in Springfield, NJ and Feasterville-Trevose, PA, we are a local business serving homeowners across our region — not a national franchise with distant management. We stand behind every project because we live and work in this community.
Ready to See Infinity Fiberglass in Your Home?
Our consultant visits at no charge — measuring every opening, walking through colors and hardware samples, and providing a written quote with zero obligation to move forward.
Infinity by Marvin - NJ & PA Installer
Fiberglass Replacement Windows Offer Lasting Performance
If improved durability, beauty, and energy efficiency are goals for your window replacement project, consider upgrading to fiberglass replacement windows from Exteriors by Global Home. We source our fiberglass windows from Infinity from Marvin, one of the industry's most reputable manufacturers, so that our customers reap all the benefits they expect to receive from their investment.
Why Fiberglass Windows?
Infinity from Marvin windows feature Ultrex® fiberglass, a premium composite material that is not only eight times stronger than vinyl windows but also more durable and stable than traditional fiberglass windows. Because the fiberglass frames of our replacement windows are so strong, they are less likely to expand and contract through the changing of the seasons, which means a tighter seal and better energy efficiency. In fact, the frames and panes swell and settle at the same rate, minimizing potential damage to the window.
The Ultrex® difference: Fiberglass frames and glass panes expand and contract at nearly the same rate — meaning seals stay airtight through every NJ winter and PA summer without gradual gap creep.
Your In-Home Consultation
Designing Your Fiberglass Replacement Windows
During a no-hassle, in-home consultation, we will help you design your new windows so that they look and function how you want them to. Select from a rich palette of acrylic colors and woodgrain finishes that are three times thicker than the norm for lasting beauty. Our fiberglass windows are low maintenance and require no sanding, scraping, or painting. However, they can be painted should you decide to try a different color in the future. You'll also be able to choose your preferred style, including double-hung, casement, sliding, and more.
Our consultants bring physical color samples, hardware finishes, and glass swatches directly to your home — so every selection is made against your existing trim, flooring, and interior palette before a single order is placed. Explore all available window styles or review our fiberglass pricing guide to plan your investment.
Serving NJ & PA Since Day One
Learn More About Our Replacement Windows
At Exteriors by Global Home, we recommend Infinity from Marvin fiberglass windows because they offer the most value for your investment. You can rest assured that we will install your new windows correctly, as we will back our workmanship with our Platinum Plus lifetime warranty.
To learn more about our fiberglass replacement windows, contact Exteriors by Global Home today. When you do, be sure to ask about our price-match guarantee. We are located in Springfield, New Jersey, and Feasterville-Trevose, Pennsylvania, and serve nearby cities, including Southampton, PA; Bensalem, PA; Holland, PA; Richboro, PA; Warminster, PA; Willow Grove, PA; Langhorne, PA; Summit, NJ; Chatham, NJ; Madison, NJ; and Montclair, NJ.
Springfield, NJ
Summit, NJ
Chatham, NJ
Madison, NJ
Montclair, NJ
Feasterville-Trevose, PA
Southampton, PA
Bensalem, PA
Richboro, PA
Warminster, PA
Langhorne, PA
View All Service Areas
All Infinity fiberglass installations are backed by the Infinity by Marvin manufacturer lifetime warranty plus our own Platinum Plus Workmanship Warranty — both documented in writing before any work begins.
Common Questions
Common Fiberglass Window FAQs
Find out answers to some common fiberglass window questions! Contact us today to learn more about how they'll improve your home!
How do fiberglass windows compare to other window materials?
Fiberglass windows stand out when compared to other materials. Unlike vinyl, they offer superior strength and rigidity. Compared to wood, they require minimal maintenance and won't rot or warp. While aluminum might be more affordable, fiberglass provides better insulation and durability. For a detailed side-by-side breakdown, see our fiberglass pricing and comparison guide.
Are fiberglass windows durable?
Absolutely! Fiberglass windows are renowned for their durability. The composite material is highly resistant to dents, scratches, and impacts. Unlike wood or vinyl, they won't warp or rot, even in harsh weather conditions. This exceptional durability ensures your windows will look great and perform optimally for years to come.
How long do fiberglass windows last?
With proper care, fiberglass windows can last for decades. Their resistance to elements like moisture, sunlight, and extreme temperatures contributes to their longevity. While factors like installation quality and local climate can influence lifespan, fiberglass windows are a long-term investment in your home. Infinity by Marvin Ultrex fiberglass is rated for 30–50 years under normal NJ and PA conditions.
Are fiberglass windows energy efficient?
Yes, fiberglass windows are highly energy efficient. Their excellent insulating properties help to keep your home warm in winter and cool in summer, reducing your energy consumption and utility bills. The tight seals and advanced glass options available for fiberglass windows further enhance their energy performance. Infinity by Marvin achieves U-factors of 0.17–0.22 — meeting or exceeding ENERGY STAR® Northern Climate Zone requirements for NJ and PA.
Do fiberglass windows reduce noise pollution?
Absolutely. Fiberglass windows are effective at reducing noise pollution. The dense material helps to block out unwanted exterior sounds, creating a quieter and more peaceful indoor environment. This is particularly beneficial for homes located in noisy areas or for those seeking a tranquil living space — especially relevant for homes near Route 1, 202, or major NJ transit corridors.
How do fiberglass windows withstand extreme weather conditions?
Fiberglass windows are engineered to withstand extreme weather conditions. Their strength and durability protect against high winds, heavy rain, and hailstorms. Additionally, they offer excellent resistance to temperature fluctuations, preventing warping and cracking. Ultrex® fiberglass specifically is rated to withstand temperatures up to 285°F and expands 87% less than vinyl in cold conditions — directly addressing NJ and PA's freeze-thaw cycles.
How much do fiberglass windows cost?
The cost of fiberglass windows varies depending on factors such as size, style, energy efficiency features, and custom options. While generally more expensive than vinyl, fiberglass windows offer superior long-term value due to their durability, energy efficiency, and low maintenance. In NJ and PA, Infinity by Marvin fiberglass installations typically range from $900–$1,600 per window installed for standard styles. See our full fiberglass pricing guide for detailed ranges and cost drivers, or compare replacement vs. new-construction pricing.